| Subject | Date Asked |
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| Max integer value | 11/20/2009 |
Q: I need to know how to do dynamic program on collatz conjecture. i.e for x = 1 to maxofinteger ...
A: You can use long (instead of int), which has twice as many bits and a much bigger value (big enough ...
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| Java Fundementals Book program 5-4 | 11/19/2009 |
Q: hey the porgram problem i have is this, my AP CS teacher aasked us to try and write a program like ...
A: You need a class Dice. That class has a single field current, it should be private. Add a method to ...
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| Displaying Bitmaps | 11/19/2009 |
Q: I just ran into this previous answer you gave: http://en.allexperts.com/q/Java-1046/java-swing-2.htm ...
A: Its pretty easy to implement your own zoom. You can simply: float scale = ...; Point scaleCenter = ...
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| SCJP | 11/18/2009 |
Q: This program will not compile. Cannot find symbol: variable passengers. /* A program that uses the ...
A: You have: class Vehicle2 { int passengers; // number of passengers int fuelcap; // fuel ...
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| Java Palindrome No. | 11/18/2009 |
Q: please assist me in making a java prog. for checking a palindrome no......and please tell me if the ...
A: To 'peel' off a digit from a number you can: int num = ...; int remaining = num; while(remaining != ...
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| SCJP | 11/17/2009 |
Q: This program will not compile. Cannot find symbol: variable passengers. /* A program that uses the ...
A: You are creating a new instance of Vehicle, not Vehicle2 as you have declared above. The compiler is ...
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| java or C++ security comparison | 11/17/2009 |
Q: I want ot know when it comes to security, that is securing your applications and softwares and ...
A: Java will be a better choice as one of the primary focuses of Java is security. Most exploits in ...
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| Java Programming | 11/17/2009 |
Q: Well I have question than I am curious about. I want to know if it is possible to write a method ...
A: To determine if a number is a power of 2 you can use the trick: if((n & -n) == n) { //power of 2 ...
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| Java DesktopPane | 11/15/2009 |
Q: Sir i m develping desktop application in netbean. first problem is that of ApplicationView ...
A: 1. I'm not sure what the ApplicationView class is. It is not a class in the standard Java API, so I ...
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| Easy Counting Program? | 11/14/2009 |
Q: I need some hints on how to proceed to write the program, specifically on how to set up the ...
A: The first thing you should notice is that if some set is not valid, than all super sets of that set ...
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| Logic circuit | 11/8/2009 |
Q: Sir, plz am jus a beginer in java, i want to write a program using swing gui to build logic circuits ...
A: This problem is best solved by simply doing your own drawing. Nothing in swing will help you much ...
|
| Compare two .CSV | 11/7/2009 |
Q: I Want to compare two .csv file and check..if the entries are equal Well not exactly.equal..with 3% ...
A: This is pretty simple: First create a Reader to read text in: BufferedReader reader1 = new ...
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| javac | 11/6/2009 |
Q: Im currently teaching myself java from different tutorils on the internet. verytime I try compiling ...
A: when you install the Java SDK it does not add the compiler to the PATH, only things on the PATH and ...
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| Big O Notation problem | 11/2/2009 |
Q: I wanted to evaluate an algorithm and my adviser told me to use the Big O notation. I really don't ...
A: Your processor can probably help you better than I can. The Big O of an algorithm is a calculation ...
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| which language to use for developing apps | 10/31/2009 |
Q: I've a strong attitude towards programming, software engineering. I want to develop some cool apps ...
A: I use Java since it runs pretty fast without having many of the pitfalls of c++. The language you ...
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| JLabel in JTable | 10/30/2009 |
Q: Harper I m Nirav Raval Frm India. At now i m develop one Windowbased Application in java ...
A: Set the default renderer (for the Object class) in your JTable (using setDefaultRenderer) to a ...
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| Array assignment | 10/28/2009 |
Q: i am in a beginning level Programming class and we were assigned to basically, from my ...
A: The array classes don't have any special implementation of toString(), you can use: ...
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| socket programming | 10/28/2009 |
Q: I ran simple example of socket programming in Java that caught it from www.sun.com (KnockKnockServer ...
A: You can either debug the application in an IDE (such as eclipse or netbeans) and hit the suspend ...
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| Exception handing | 10/28/2009 |
Q: i've to know what is the difference between PrintStackTrace and Exception and getMessage in ...
A: printStackTrace method prints the message and the stack of the current thread when the exception was ...
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| about database driver connection | 10/24/2009 |
Q: heyy im tryin to connect the database by java program and retrieve the table details but im not able ...
A: You are getting an exception because the version of javac you are using is newer than the version of ...
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| file io | 10/22/2009 |
Q: I was looking at some examples on basic file IO in java, but what i notice is that there are many ...
A: There are various levels of efficiency (hence there are many ways of reading/writing a file). For ...
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| memory efficiency | 10/21/2009 |
Q: let's say I wanna use an object, say an arraylist, several times would this be memory efficient?: ...
A: This depends if you expect the arraylist to have about the same number of elements each time. When ...
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| socket programming | 10/19/2009 |
Q: How can i start socket programing in Java? I must write one program that some devices send and ...
A: Create a ServerSocket object that listens to incoming traffic on the initial receiver of the data, ...
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| Java RTE in IE8 | 10/17/2009 |
Q: In the Java Control Panel (in Vista Control Panel) in the Advanced tab, the fourth setting down is ...
A: You are running the Java control panel as a regular user, therefore you cannot disable Java for ...
|
| javascript popup | 10/16/2009 |
Q: I have a problem with a script, I downloaded this script and I'm trying to use it on my website: ...
A: Just have the address for the hyperlink be the code that opens up the box: e.g. <a ...
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| Java RTE in IE8 | 10/15/2009 |
Q: In the Java Control Panel (in Vista Control Panel) in the Advanced tab, the fourth setting down is ...
A: Java has nothing to do with Flash. If you are having problems installing Flash you are looking in ...
|
| palindrome in java | 10/15/2009 |
Q: import java.io.* public static void main(String arg[]) { String a; System.out.println("Enter your ...
A: You should explicitly state yourHow do I reverse a String? Answer: ... CharSequence reverseString = ...
|
| Print top 2 scores | 10/14/2009 |
Q: I was looking through the program on this website and I have a question .....how can u change the ...
A: You could keep track of the highest score and second highest score as all the names are being ...
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| or statements | 10/10/2009 |
Q: For my programming assignment I have to make a game that is similar to Yahtzee, so the player will ...
A: For a small set of dice you have, not really. The order of the dice doesn't matter, so you could ...
|
| swing component | 10/8/2009 |
Q: advantages of using JTabbedpane and JScrollPane in designing GUI? what is plugable look and feel? ...
A: The JTabbedPane allows multiple windows to be grouped into a single window, selectable with a tab. ...
|
| Decimals in numbers | 10/6/2009 |
Q: import javax.swing.JOptionPane; public class Ljw02mathIoGui { public static void main (String ...
A: First, you need to do floating point division instead of integer division. You can do this by ...
|
| java | 10/6/2009 |
Q: Artemus I've finished some programs using netbeans ide in java it is supposed to be a battleship ...
A: The possible problems are: 1. when you double click on a jar, by default the command that runs is ...
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| J2me | 10/4/2009 |
Q: i am at the 5th year in the informatic faculty i am thinking about graduation project i am thinking ...
A: Doing face reconnection can be a processor intensive task (provided you can interface with the ...
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| need ur help | 10/3/2009 |
Q: what is difference between implicit type casting and explicit type casting?
A: Implicit type casting happens when you assign a value to a variable of a super type. E.g. String s = ...
|
| Java, but not sure what you'd classify this question as. | 10/2/2009 |
Q: Ok, I'm a Computer Programming student (my advisor talked me into changing my major from hardware to ...
A: Typically the way animation is done is by using a Timer (in javax.swing, not java.util), that ...
|
| java | 10/1/2009 |
Q: Artemus I've finished some programs using netbeans ide in java it is supposed to be a battleship ...
A: What you want to do is export your project as a jar file. Once it is a jar file, you should (and ...
|
| editing a specific line in a Table | 10/1/2009 |
Q: Hey Artemus, Hows it going.. im experiencing a problem trying to use the update method in results ...
A: The primary reason this would not work is, that there is no entry with Client_ID=idNo already in the ...
|
| Java programming in grid | 10/1/2009 |
Q: I want to display LAN connected PCs which are in the grid environment.How to display LAN connected ...
A: Getting a list of computers on the LAN is an operating system dependent function. A windows network ...
|
| Classpath Problem | 9/30/2009 |
Q: I was trying to create a new package. My java is saved in C:\Program Files\Java\jdk1.6.0_11. I just ...
A: You should not put your java file in the jdk directory, create another directory somewhere else for ...
|
| block hardware | 9/29/2009 |
Q: I am searching a code in java for disable and enable the MOUSE ,KEYBOARD,CD-ROM ,USBPORT. but i ...
A: These operations are operating system dependent (and would require administrator privs). Why would ...
|
| Communicating two servers | 9/29/2009 |
Q: I need to telnet a destination ip from a source ip through a java program and both the ip are remote ...
A: Using sockets is seprate from telnet. A telnet library will set up and sockets and everything for ...
|
| java,awt.Graphics class error | 9/29/2009 |
Q: I am in the process to create a Game . I want to know , how do we make images move dynamically ...
A: Use the javax.swing.Timer class. You can set up an action that happens every so often. In your ...
|
| Opening a specific page of a .pdf file by click of button in java | 9/29/2009 |
Q: Could you please provide me a method to open a particualr page in a .pdf file. Scenario : I have a ...
A: You can't really do it the way you are trying, since you are basically asking adobe acrobat (or ...
|
| reversing a number using a while loop | 9/27/2009 |
Q: How do I reverse a number using a while loop ? can you help me write the code (not necessarily the ...
A: By using the mod (%) and div (/) operators you can peel off the digits of the number, then you ...
|
| editing a specific line in a Table | 9/26/2009 |
Q: Hey Artemus, Hows it going.. im experiencing a problem trying to use the update method in results ...
A: You can use an update query, provided that WO_Number is unique: PreparedStatement query = ...
|
| Help Please Sir/Madam | 9/25/2009 |
Q: Sir i have a small problem (i guess for you all out there) i have a class as shown below... from ...
A: I'm not sure how the data you get is translated into text. Some of it may be text, but some of it ...
|
| java | 9/24/2009 |
Q: Well so far I have the following code: however I want my program to only print the numbers that when ...
A: In your case, since you are only going up to 10000 you only need primes up to 36 (9999 adds up to ...
|
| interactive website | 9/22/2009 |
Q: How are you? Thanks for taking questions. I would like to write a photo webiste where a user could ...
A: You will probably need to know both Java (for the backend) and Javascript (for the frontend). It is ...
|
| String transformation | 9/19/2009 |
Q: There is a program where I have to put the following in a dat file. Sample Input: 3 ...
A: You can use a StringBuilder to make a modifiable string. First create a BufferedReader that wraps ...
|
| Java Programming | 9/15/2009 |
Q: I was just wondering how to make a program that will input an array of strings, using permutation ...
A: First you would put the words into an array. Then you will need to create another array that ...
|
| Java Printing of JFform | 9/14/2009 |
Q: I am working on a java application which allows the user to prepare and print invoice sheets and ...
A: When you implement the setValueAt, and once a value for both the quantity and unit price is entered ...
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| Java Printing of JFform | 9/12/2009 |
Q: I am working on a java application which allows the user to prepare and print invoice sheets and ...
A: You can use the print() method of JTable to simply print that. Printing something else, will require ...
|
| Java | 9/12/2009 |
Q: I have a question on how to write a program can you help me. I have to write a program that will ...
A: What you have will generate random characters, but it is not optimal for doing so as a String is ...
|
| Testing Efficiency | 9/11/2009 |
Q: I'm trying to re-learn programming, but was wondering what are some ways of testing efficiency & ...
A: effciency and speed are often the last things you test in a program, and you only do that if these ...
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| Solution for a Java Problem | 9/10/2009 |
Q: Respected Sir, Instead of doing: HSSFRow row1 = sheet.createRow((short) 1); HSSFRow ...
A: I think you want to do something like: HSSFRow[] rows = new HSSFRow[4]; for(int r = 0; r < ...
|
| JAVA | 9/10/2009 |
Q: Sir, I am developint one window base application in java and I am using JInternal frame in this ...
A: There are many ways to do this. You need to have some common class that keeps a reference to both ...
|
| Need a solution for coding in Java | 9/9/2009 |
Q: Respected Sir, I have a Java program which reads the cell contents of Ms Excel.I am ...
A: You will have to get an external library if your data really is in Excel format. If possible, you ...
|
| Java | 9/8/2009 |
Q: I am trying to design a program in Java that would block a site and redirect it to a page displaying ...
A: Java is a poor language choice for any application that interacts directly with the operating system ...
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| encoding in client /server using steganography | 9/3/2009 |
Q: could u send me good algorithm codes on java to establish the connection
A: since steganography generally requires some other form of communication to piggy back on, you will ...
|
| Sql Time problem | 9/1/2009 |
Q: I'm experiencing a problem with the toString() method in the java.sql.Time class.. There seems to be ...
A: This is most probably caused due to t1 being null. If t1 is null, then attempting to call toString() ...
|
| advantage of becoming a SCJP | 8/31/2009 |
Q: I am currently studying in BITS Pilani,Pilani campus. I want to know whether i should give SCJP(Sun ...
A: I have not taken the SCJP, nor can I tell you what fees there are in India. What I can tell you is ...
|
| Java troubleshoot | 8/30/2009 |
Q: I recently downloaded the latest JDK, which is version 1.6.0_16. The software is stored at C:Program ...
A: You first need to compile the program, the compiler javac is located at c:\program ...
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| Netbeans 6.0 Java- Installation File Making | 8/26/2009 |
Q: I have just completed a window based java project in Netbeans IDE 6.0. Now I want to distribute this ...
A: JRE is standard software, it is common for computers to have it, and you can get Java installers ...
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| Java- Reports | 8/24/2009 |
Q: I am developing a window based paryroll System in Netbeans IDE 6.0 for a firm. In this project I ...
A: You can use a JTable to display the results of a query. Simply create your own TableModel for the ...
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| JTable using vectors or arrays? | 8/21/2009 |
Q: I am currently trying to make a Table displaying inputted information in the table cells containing ...
A: You should use the DefaultTableModel. Simply create a DefaultTableModel, then create the JTable ...
|
| java | 8/18/2009 |
Q: how does a class accomplish data hiding?
A: Data hiding is done by making a field non-public. When a field is non-public only some code can ...
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| java | 8/18/2009 |
Q: Why is Java known as plateform-neutral language and How is java more secured than other language?
A: Java programs operate under a virtual machine. The virtual machine acts as an intermediary between ...
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| java | 8/18/2009 |
Q: How are Data and Methods organized in an object-oriented Program ?
A: When an instance of a class is created its memory is usually laid out as: fields0 //All the fields ...
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| check the string is intigerformate | 8/18/2009 |
Q: sir,i have one string, String s1="2009081814421284371053060060"; now i have to check inside of s1 ...
A: Integer characters start at '0' and end at '9' Simply do: if(ch < '0' || ch > '9') { //invalid ch ...
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| JDBC date entry error | 8/17/2009 |
Q: I am experiencing a problem with my code, I am trying to enter data into an access database called ...
A: It is possible you are using a reserved word in access. You can avoid this problem by wrapping these ...
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| problem in the outuput of an applet using thread | 8/16/2009 |
Q: import java.applet.*; import java.awt.*; /*<applet code=horse width=200 height=200> </applet>*/ ...
A: The Thread.sleep method is a static method. When you call it only the calling thread pauses. As a ...
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| JDBC date entry error | 8/15/2009 |
Q: I am experiencing a problem with my code, I am trying to enter data into an access database called ...
A: Sorry for the confusion; the date parameter is a java.sql.Date rather than a java.util.Date. You ...
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| JDBC date entry error | 8/13/2009 |
Q: I am experiencing a problem with my code, I am trying to enter data into an access database called ...
A: It is possible that the database doesn't like the date format. To avoid many of these issues you ...
|
| Mac Id using Java | 8/12/2009 |
Q: Sir i want to use mac id in java. prog. for providing security. Can u give me the code. for getting ...
A: You can use the java.net.NetworkInterface to access the mac address. First you need to get the ...
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| java | 8/7/2009 |
Q: what is the function of 'this' keyword? in the command: b.addActionListener(this) what does 'this' ...
A: super is the same as this, except that it is used to call methods in the parent class that have been ...
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| JAVA Media File | 8/7/2009 |
Q: Sir. I want to make a media file in java. SO please tell me how I can i play a songs in java ...
A: This generally depends on what the format of the songs are. For mp3s you will need to get a an extra ...
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| java | 8/7/2009 |
Q: what is the function of 'this' keyword? in the command: b.addActionListener(this) what does 'this' ...
A: I'll assume that b is a JButton. In which case, JButton's class looks like: public class JButton ...
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| java GUI that stimulates ATM | 8/4/2009 |
Q: i need to creat 1 JAVA applet as ATM GUI. Need to put username and pin. Then user balance is ...
A: This depends a lot on how you want your GUI to look. Does it look just like an ATM, or do you assume ...
|
| MS DOS | 8/1/2009 |
Q: how can i make a program using ms dos which you need to enter a letter ,if i type small letter a-z ...
A: In Java you can't just ask for 1 character at a time (not without using code from C/C++). You can ...
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| distributed computing query | 7/31/2009 |
Q: sir,i want to make a project on distributed computing such that i have a large set of data and if i ...
A: Distributed computing is a very large field, there are many ways to implement such a solution. One ...
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| function that returns | 7/26/2009 |
Q: sir, I like to know the function and the object that I need to use to get my present ip ...
A: It is possible that the IP address you are looking at might be in the IPv6 form: x:x:x:x:x:x:x:x ...
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| function that returns "my ip"? | 7/23/2009 |
Q: sir, I like to know the function and the object that I need to use to get my present ip ...
A: What you have works pretty well, provided that the computer is connected to the internet and is not ...
|
| Widgets toolkits in java | 7/22/2009 |
Q: I am currently making a GUI using the Swing package but i am looking for a way to make my windows ...
A: First if you aren't using the native look and feel try that, it is a decent substitution of the ...
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| Report Development | 7/22/2009 |
Q: Harper, I am developing a window based software in Netbeans 6.0 IDE in Java. Now in ...
A: There are various examples on the web that explain how to do this. e.g. ...
|
| JDK 6 | 7/22/2009 |
Q: I'm currently studying Java from http://www.cs.princeton.edu/introcs/home/ I stumbled upon this ...
A: Chances are you have a java (or class) file located in your Java directory called Integer.java which ...
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| java WebcCawler | 7/21/2009 |
Q: did you ever solve the problem at http://en.allexperts.com/q/Java-1046/2008/3/Java-WebCrawler.htm ? ...
A: I think the answer I provided: guessContentTypeFromStream is a best guess about the content type and ...
|
| "clear screen" how in java and java script? | 7/21/2009 |
Q: sir, I like to know the Command used(if not the way) to clear screen when program is running in ...
A: Java doesn't have support for advanced console functions like clear screen. If you need to do ...
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| Java | 7/16/2009 |
Q: I am curious, is it possible to inject client side code into a server side Java Web Application? If ...
A: In general no, although this depends on how the Java server was coded. You can put security holes ...
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| need help imediatly | 7/16/2009 |
Q: heh mate, well i am working on project in which i want that the events fired by internet explorer ...
A: Java components can react to key events and mouse events when the mouse or keys are pressed when the ...
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| project | 7/15/2009 |
Q: i have project(made in java)but i can't know how to open the project because there are no. of class ...
A: class files are compiled files, the source files are java files. The 'project' file depends on the ...
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| upload my pdf partially on my server | 7/15/2009 |
Q: sir ,please tell me how can i partially upload my pdf file on my server so before fully upload first ...
A: I don't know how your server operates, but if you have an open stream from the client while ...
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| upload Zip file | 7/14/2009 |
Q: sir, In my web appliaction i want to upload only pdf file.but if i have EXE or TEXT File its also ...
A: When you have your InputStream for a zip file, just feed it into a ZipInputStream and read from that ...
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| upload pdf file | 7/13/2009 |
Q: sir, In my web appliaction i want to upload only pdf file.but if i have EXE or TEXT File its also ...
A: You have to allow at least a partial pdf upload, as you will have to look inside the file to ...
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| JAVA | 7/1/2009 |
Q: I want to create a java program using a JFile Chooser.Actually I wanted a JFrame containing a JMenu ...
A: If you just want the file names of those in the chosen directory, then you can use String[] ...
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| JAVA | 6/25/2009 |
Q: I am trying to convert a java program into a standalone application.please help with the code of the ...
A: If you want it to run as an Applet you can package your classes in a jar and distribute an html file ...
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| Code of compiling a .java to .class file | 6/24/2009 |
Q: I received the code: Process javacProcess = Runtime.getRuntime().exec("java -cp <location to ...
A: tools.jar has been around for quite a while. If your using windows, you can find it in c:\program ...
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| JAVA | 6/24/2009 |
Q: I am trying to convert a java program into a standalone application.please help with the code of the ...
A: What you need to do is change the extends Applet to extends JFrame (you could just use a normal ...
|
| Compile a .java file to .class within a java application. | 6/23/2009 |
Q: I have a java application that creates a jar file, the manifest file, but doesn't compile to .java ...
A: To do this you need to include the tools.jar in your application. tools.jar is usually located in ...
|
| JAVA | 6/22/2009 |
Q: I want to zoom in & zoom out an image in a JFrame using 2 Jbuttons "+" & "-" respectively.Please ...
A: I think I have a better understanding of what you are trying to do now. Here is a sample piece of ...
|
| Help me | 6/22/2009 |
Q: Java Script is better than other scripting languages for web design ???? plz give me anwer in detail ...
A: For client side scripting you really don't have much choice, as Javascript is the most widely ...
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| JAVA | 6/22/2009 |
Q: I want to zoom in & zoom out an image in a JFrame using 2 Jbuttons "+" & "-" respectively.Please ...
A: What you will need is two variables, one to store the transform, and another to store your zoom ...
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| JAVA | 6/19/2009 |
Q: I want to zoom in & zoom out an image in a JFrame using 2 Jbuttons "+" & "-" respectively.Please ...
A: Use the Graphics2D.drawImage(Image,AffineTransform,ImageObserver) method. For the AffineTransform ...
|
| Java Graphics | 6/18/2009 |
Q: I want to be able to change an image's (gif or jpg) background and foreground color. I also want to ...
A: I'm not sure what you are trying to accomplish. An image such as gif or jpg doesn't have a ...
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| HTTP POST | 6/17/2009 |
Q: What is the best way for sending a ZIP file over HTTP POST from one servlet which just collects it ...
A: Sure you can. See: http://www.theserverside.com/tt/articles/article.tss?l=HttpClient_FileUpload Its ...
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| the frame does not show | 6/17/2009 |
Q: the given code does not show any runtime or compile timne errors.however it only shows a plane frame ...
A: You have a size set for the frame, not a preferred size for the cirarc1 component. I would: 1. ...
|
| How can I see big values defined as BigDecimal | 6/13/2009 |
Q: Let x = 2 to power 20000 Let y = 2 to power 3209 Then z = x multiply y = 2 to power 23309. I ...
A: Chances are that the operation failed, possibly due to running out of memory (are you sure no ...
|
| sockets and thread | 6/12/2009 |
Q: can we have a socket in a class that is not a thread? i want the socket to continually receive ...
A: There is nothing really special with the main thread, you can do anything on any thread. However, ...
|
| stack overflow error | 5/29/2009 |
Q: I am on a course to learn Java and as homework I have too modify an subclass of Account(a bank ...
A: A stack overflow error generally means you have one method calling itself (or one method calling ...
|
| Java | 5/26/2009 |
Q: I have Windows XP and every once in a while a Java Update pops up when I activate my laptop. It's ...
A: You can go into the Java control panel and under the update tab disable automatically checking for ...
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| java swing gridbaglayout | 5/23/2009 |
Q: In GridBagLayout can i assign more then one button in one grid cell??
A: Yes, you could increase the gridwidth or gridheight for the the buttons so they take up multiple ...
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| Arrays as Instance Variables in Java | 5/21/2009 |
Q: I need to store and later use an array in different functions of a class body in Java. In C/C++, I ...
A: All Objects in Java (including arrays) are passed by reference. When one method changes the array, ...
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| electronics-Boolean logical truth tables | 5/19/2009 |
Q: I am studying java programming as a hobby. I indirectly need the answer of this question. What is ...
A: When you distribute NOT over a group you put NOT on each element and change AND to OR and OR to AND. ...
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| Java- JAR File | 5/17/2009 |
Q: Harper I've just completed my project in java. And now i want to make executable JAR file. ...
A: You can try exporting with the generic jar option instead of the executable jar, this will give you ...
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| Java will not start under Vista Home Premium | 5/16/2009 |
Q: I have installed Java (jre6-u13) on a new laptop (Acer Aspire 5520G with AMD Turion dual processor ...
A: Either something is screwed up in the installation, or there is some kind of conflicting component. ...
|
| getting keys from a multimap if the value is specified | 5/15/2009 |
Q: I have a multimap of this format... Code: import java.util.ArrayList; import java.util.HashMap; ...
A: A map is designed to map keys to values. You can iterate over the entrySet in the map and determine ...
|
| Using the break statement in a while loop | 5/14/2009 |
Q: Since using the break statement is considered bad code except for in swithch statements, how could ...
A: One way would be: int i; for(i = 0; i < names.length && !names[i].equals(searchName); i++) ; ...
|
| How to create an executable file for a Java program? | 5/13/2009 |
Q: I have written a Java program using NetBeans IDE and want to send it to my friend such that he can ...
A: Just make sure when you export your program to a jar file you do not export the java files. This is ...
|
| java queue | 5/11/2009 |
Q: ..but it doesnt seem to be working at all ..could you please help me and see what the problem is? ...
A: There are a few problems with this code: 1. emptyQ should check if last is -1, not if the buffer ...
|
| Animated GIF image in Buffered Image | 5/4/2009 |
Q: I want to read an Animated GIF from a file into BufferedImage and then write on a Jlabel in JFrame. ...
A: You can't load all of an animated gif into a buffered image as BufferedImage only supports static ...
|
| java method | 5/4/2009 |
Q: public class Customer { // Instance Variables (you fill in) private Time24Hour arrival; ...
A: I have no idea what Time24Hour class is. You generally don't store the difference in time in a Time ...
|
| java constructor | 5/2/2009 |
Q: i am just wondering, what is the problem with these codes i had? public class Queue { // ...
A: The reason your code doesn't compile is that you are assigning an index of an array which is a Queue ...
|
| User InterfaceDemo | 4/29/2009 |
Q: I am a graduate level computer student. i want to do a online live security project in Java(using ...
A: This may be difficult to do as you probably don't want the camera to trigger on small changes ...
|
| Bigram count | 4/28/2009 |
Q: I am writing a java program that is suppose to read a text and return the 15 most common bigram (th, ...
A: In your while loop you want to keep track of the previous character, then check that and the current ...
|
| Counter/tickers | 4/27/2009 |
Q: I am looking into adding a feature to my website that adds a number by 1 every 11 minutes 7 seconds. ...
A: I'm not an expert on javascript, rather I'm an expert in Java. But to try and answer your question, ...
|
| Help me with static variable | 4/26/2009 |
Q: I need help. Ill go straight to the point: I have 3 classes: [QUOTE][B]public class AssembledPart ...
A: The primary problem is that getAvailForAssembly is static. The only way you can make this non-static ...
|
| Java programming | 4/25/2009 |
Q: First of all is Java the best and most latest programming language? And secondly I'd like to know if ...
A: First of all is Java the best and most latest programming language? There is no best programming ...
|
| java hangman | 4/21/2009 |
Q: I am trying to write a java hangman game but i am very confused. I think the way i need to do it is ...
A: I really don't understand what you mean by which letter is 'shown' first. You can use the Random ...
|
| Question regarding permutations of functions--contd | 4/17/2009 |
Q: Regarding my previous question...I have to use Java Reflection for invoking the functions. "I have ...
A: I would look at the java reflection tutorial: ...
|
| java hangman | 4/16/2009 |
Q: I am trying to write a java hangman game but i am very confused. I think the way i need to do it is ...
A: You can do it with arrays. You will also need a second array that masks what characters you show and ...
|
| Huffman Question | 4/15/2009 |
Q: Hope you are fine and in good health, My questions are: 1. can we make a wizard to a java program, ...
A: Generally the bits are simply ignored you can set them to 0. Note that you do need an EOF symbol ...
|
| Java Swings | 4/15/2009 |
Q: How to dynamically populate the values from the database into JComboBox. Thanks and Regards Vinod
A: If you are repopulating data, first make sure you call removeAllItems() from the JComboBox to start ...
|
| color of buttons | 4/14/2009 |
Q: i'm using CodeWarrior and i'm using applets... i have made buttons but i wish to change the color of ...
A: If you simply want to change the color, you can set the background color of the button to something ...
|
| image | 4/14/2009 |
Q: Can we get an image as output when we give its pixel values as input...please give me the java code ...
A: This somewhat depends on the format of the input, the kind of image you want (e.g. do you need ...
|
| Array | 4/13/2009 |
Q: so I have written a program which reads from a file and does pay,update and info transactions. The ...
A: You are searching though the array, but you are not making sure you don't go outside the bounds of ...
|
| Setup wizards, and registers | 4/12/2009 |
Q: Hope you are fine and in good health, My questions are: 1. can we make a wizard to a java program, ...
A: You can have java do stuff like this by executing native operating system commands. However, by ...
|
| modifying an existing file in java. | 4/9/2009 |
Q: I'm rather new to java and wanna know how to modify an existing file. I have this text file called ...
A: Generally text files have to be rewritten from scratch when changed, simply overwrite the document ...
|
| Java Graphics API | 4/6/2009 |
Q: Hola! I'm making a virtual tour program of our school. I plan to make 3d models of the buildings ...
A: I haven't used wrl files, but it seems that ...
|
| clear screen applet | 4/2/2009 |
Q: sorry i m not specify .. now... when ever click on clear button then it clear the applet screen and ...
A: You should only be using the command prompt in applets for debugging information. If you want, you ...
|
| Java | 4/2/2009 |
Q: need help creating the below java program: Read in an integer and output it in one or more ...
A: Reading in a number is easy, just use: int num = Integer.parseInt(numStr); Writing a number in a ...
|
| Encrypt and Decrypt codes | 4/1/2009 |
Q: I just need to ask a question about encryption and decryption. How could you improve the codes to ...
A: You can store the random instance as a static variable. Or you could create a new random instance ...
|
| Encrypt and Decrypt codes | 3/31/2009 |
Q: I just need to ask a question about encryption and decryption. How could you improve the codes to ...
A: I'm not sure I understand your question. You can use the BigInteger to store very large numbers. ...
|
| allign the string output | 3/30/2009 |
Q: Could you help me with the following please? I am printing(outputting) from a string linkedList both ...
A: You could use tab, which will work fine if you import the text file into a spread sheet program like ...
|
| comparing 2 text files | 3/24/2009 |
Q: Could you provide me with some examples and codes (links or tutorials)on how to compare 2 text ...
A: If you just want to check to see if the files are exactly identical, you can read each file byte by ...
|
| java | 3/19/2009 |
Q: explain java is compile or interpreter language?
A: Java source code is compiled into an intermediate language (bytecode) that is easily translatable ...
|
| JSP login screen | 3/15/2009 |
Q: .can you teach me on how to create login page, when the login is successful, it will redirect to ...
A: Although I don't know much about JSP, you can take some of the code from: ...
|
| Java arrays | 3/11/2009 |
Q: I'm in an algorithm analysis class and in order to show the efficiency of the algorithm that I am ...
A: The maximum value of an int (which is the max value of an array) is 2,147,483,647. If you are using ...
|
| readLine() java | 3/11/2009 |
Q: May I ask what your thesis is for your masters? I am studying CS as well. I can't wait to start my ...
A: Just as you can read in each line of a file you can write it in a similar way you read it. For ...
|
| Mouse clicks | 3/9/2009 |
Q: we are making a hexagon minesweeper game in a java applet, and we wondering how to differentiate ...
A: You can use e.getButton() to determine the button. MouseEvent.BUTTON1 is the left mouse button, ...
|
| Button Shapes | 3/6/2009 |
Q: I was wondering how i can make hexagon shape buttons in java applets, we are using this to make a ...
A: You can't use a JButton for this, as they are square, and even though you can paint less than a ...
|
| Putting pictures into java | 3/5/2009 |
Q: when i put two pictures in java they have white backgrounds even when i take the background out in ...
A: It might be possible that the format you are saving the image in doesn't support transparency, or ...
|
| incomparable types Error! | 3/2/2009 |
Q: I could really use your help :) if you look at the code here: http://rafb.net/p/jkrJXP28.html At ...
A: You can't intermix Strings and chars. You probably just need to change your Stack from having chars ...
|
| incomparable types Error! | 3/2/2009 |
Q: I could really use your help :) if you look at the code here: http://rafb.net/p/jkrJXP28.html At ...
A: You can only use constant values in case statements. You either have to change your switch statement ...
|
| if condition problem | 2/27/2009 |
Q: I have a problem with my code: this code will serve as one of our assignment in our school Pls ...
A: You mean there is no compile time error... You shouldn't use == with Strings or any non-primitive ...
|
| Regarding writing to CSV using Java.io.FileWriter | 2/26/2009 |
Q: I can successfullu write to a CSV File using Java.io.FileWriter using some code that you had posted ...
A: You can use the DecimalFormat class ...
|
| Splash Screen in Swing | 2/26/2009 |
Q: Harper, Thanx for giving answer of my privious question. Now,I want to ask u about to ...
A: When you run the java command you can specify a splash screen (can also be included as an option in ...
|
| Button Click sound | 2/25/2009 |
Q: Harper, I've been working on a swing based project. In which i need ur help. I want to put ...
A: The java sound API is quite advanced and allows for many complex operations. Assuming you want to ...
|
| Java | 2/22/2009 |
Q: I tried to use Trend Houscall to scan my machine, however, it said Java was not installed or ...
A: You probably need to open the Java control panel and ensure that Java is properly associated with ...
|
| report in java | 2/18/2009 |
Q: I want create software like Notepad Or text Editor in java how can i do it it will be nice if you ...
A: If you are displaying the information to the user in a JTable then you can simply call print() on ...
|
| bachelor of computer science | 2/17/2009 |
Q: Artemus I'm halfway towards my bachelor of computer science degree. I just got a question for you ...
A: A general degree leads to a more rounded career which will make it easier to switch professions. A ...
|
| Fill web form - JAVA | 2/14/2009 |
Q: i m Sherzod Hakimov. studying Computer science . i saw ur post in the site filling web form with ...
A: captchas are designed to thwart automatic registration exactly like you are trying. There are ...
|
| Stack | 2/13/2009 |
Q: I'm new to Java. I was wondering if you know some good links or examples on stacks? something like ...
A: As I said you can look at the source code of these for inspiration. I also explained how to ...
|
| Stack | 2/13/2009 |
Q: I'm new to Java. I was wondering if you know some good links or examples on stacks? something like ...
A: The LinkedList class is a good class that can simulate a stack. The push operation is addLast, and ...
|
| Developing SWT Games | 2/10/2009 |
Q: I need help in developing SWT games in java, but I really didin't find a reference for developing ...
A: This depends on what kind of game you are developing. Many games use their own custom interface and ...
|
| detect firewall in the client system while running the web page | 2/10/2009 |
Q: When i am opening the web page, find firewall in the client system whether firewall installed or ...
A: Nearly every computer now days has a firewall installed. That firewall may or may not interrupt with ...
|
| Notpad | 2/7/2009 |
Q: I want create software like Notepad Or text Editor in java how can i do it it will be nice if you ...
A: I'm not sure what process you took to create the exe, but simply telling me it isn't working gives ...
|
| Java - spliting numbers | 2/5/2009 |
Q: I wannna know how to split numbers using java. For example 234 is split into 200,30,4...can you ...
A: You can use the mod operator (%) for this. int n = 234; //input value int d = 10; //start at the 1s ...
|
| Java | 2/3/2009 |
Q: I have created a download manager in java. Now i want to integrate it with web browser.How can i do ...
A: You first have to decide if you want to use applets or java web start. Java web start runs in a ...
|
| Array of Objects | 2/2/2009 |
Q: what would I put in each constructor? MyArray () MyArray (int initCapacity) MyArray (Object[] a) ...
A: You need two data members, an array, and a count that determines how much of the array is in use. ...
|
| Array of Objects | 2/2/2009 |
Q: what would I put in each constructor? MyArray () MyArray (int initCapacity) MyArray (Object[] a) ...
A: What you are trying to do is emulate a class that already exists in Java, java.util.ArrayList. ...
|
| Java | 1/28/2009 |
Q: I have a very general question for you. I have a background in design and am pretty adept at ...
A: Although I haven't used Flash I cannot tell you what shortcomings Flash has. But with Java, its ...
|
| java swing | 1/25/2009 |
Q: The image is in the panel.how to save that image in the file using savedialogbox
A: Step 1: Get the location to save from the save dialog box E.g. JFileChooser fileChooser = new ...
|
| Java | 1/17/2009 |
Q: How to accept input using stream readers in java?
A: Something like this: import java.io.*; ... try { InputStream in = new ...
|
| is it possible | 1/13/2009 |
Q: hai I am running a java application and want to give the focus to a Microsoft word application ...
A: This is difficult since java has very few operations that interact directly with other running ...
|
| Java and JavaScript | 1/9/2009 |
Q: I am learning about Java and JavaScript and kinda understand a little about them. I am just not ...
A: Java is a compiled language like C or C++. It is 'safe' in that it manages computer resources and ...
|
| interpreter & compiler | 1/7/2009 |
Q: i think this is a very basic question.... JVM is an interpreter. Interpreter shows error step by ...
A: I think you are confusing javascript with java. Javascript uses an interpreter to run, while java ...
|
| interpreter & compiler | 1/6/2009 |
Q: i think this is a very basic question.... JVM is an interpreter. Interpreter shows error step by ...
A: The JVM doesn't always run in interpreted mode, it can also run in compiled mode, or mixed. By ...
|
| Graphical simulation, Threads, CPU usage | 1/1/2009 |
Q: Java Problem: Basically my ball collision simulator hogs CPU usage. Description: My class extends ...
A: Don't rely on paint if you want to do continuous updates. Instead start a new thread, put its ...
|
| core java-package | 12/25/2008 |
Q: package mypack; class Balance { String name; double bal; Balance(String n,double b) { name=n; ...
A: You should create a directory and put the source code in there. Then compile from the base ...
|
| Design patterns | 12/24/2008 |
Q: I hope you are fine and in good health, please, I need your help in design patterns, I searched ...
A: There are many design patterns for various purposes. If you were more precise on what you were ...
|
| Applet in Opera | 12/23/2008 |
Q: I developed a Java Applet using Swing. It runs correctly in IE & Firefox. But When it runs in Opera, ...
A: If tooltips are not working for you, you have a few options: 1. You can use Java web start instead ...
|
| Ask about java | 12/21/2008 |
Q: Java is Application Programs or not?
A: Java can be used to design applications that run directly on an end user's computer. Java programs ...
|
| Creating GUI using different classes | 12/14/2008 |
Q: In my java application, I intend to create my GUI, actually an output frame, step by step by adding ...
A: This depends on how reusable you want your components to be. Simply passing your main class as a ...
|
| Notpad | 12/14/2008 |
Q: I want create software like Notepad Or text Editor in java how can i do it it will be nice if you ...
A: Here is an example of a simple text editor. There are various text components, JTextArea is easy to ...
|
| Dragging Vector-made pictures around the Panel | 12/10/2008 |
Q: Im a member of a small team that struggles to write a simulator of a train modell. So far we have 4 ...
A: Although I don't have all your code (missing Punkt and Formeln classes), what you probably want to ...
|
| Math.random() | 12/8/2008 |
Q: I need to dispay a frame that contains 9 lebles which may dispay a cross image icon, a not image ...
A: A simple way to generate a random number between 0 and 2 is: int n = (int) (Math.random() * 3); ...
|
| doubly linked list from C++ to Java | 11/27/2008 |
Q: I have done 1 and a half year in CS and then quit and started working. I'm now continuing where I ...
A: When you install the java SDK, you will find src.zip folder in the install directory. For Windows ...
|
| Java Random Array Numbers Ascending | 11/23/2008 |
Q: You responded saying that you dont answer Homework questions. I am sorry I was not asking for the ...
A: If you can't use the sort method, then you could iterate though the array finding the smallest ...
|
| doubly linked list from C++ to Java | 11/23/2008 |
Q: I have done 1 and a half year in CS and then quit and started working. I'm now continuing where I ...
A: Java already has a linked list class: java.util.LinkedList, you can look at the source code for that ...
|
| Array out of Bounds | 11/21/2008 |
Q: I was wondering if you could help me, I always get an ArrayINdexOutofBounds:0 error and i don't know ...
A: If you get an array index out of bounds 0, it means you have an array of size 0, as you can only ...
|
| Low level rendering | 11/21/2008 |
Q: i wanted to know how rendering works, and if it's not too difficult, i want to build a very ...
A: If you are using Java, you have to use Java classes since many of them access the underlining ...
|
| Database update using a timer | 11/17/2008 |
Q: I need help for the following subject. I have to make an application that saves information in SQL ...
A: Look at the Timer tutorial: http://java.sun.com/docs/books/tutorial/uiswing/misc/timer.html In ...
|
| Downloading Notepad file from Internet | 11/15/2008 |
Q: How can I download a notepad file from internet by using Java code? Can you give me the java code ...
A: Here is a simple tutorial on using URLs: ...
|
| java Snake Game | 11/14/2008 |
Q: I've recently been asked to create a java program that is very similar to the classic mobile phone ...
A: Java has limited functions for using the console, it is not recommended you try to emulate a ...
|
| Thread execution order | 11/13/2008 |
Q: I have a doubt in Threads section. How run() execute when start() invokes ,When we use Runnable ...
A: The details on how start() works is platform dependent. In many cases, start() will return and the ...
|
| new operator | 11/11/2008 |
Q: I am having a hard time understanding why I need to use the new operator in the following code: ...
A: You can't. This is not c++, all objects are allocated on the heap. In actually, the compiler would ...
|
| new operator | 11/11/2008 |
Q: I am having a hard time understanding why I need to use the new operator in the following code: ...
A: The Scanner class is a wrapper around a stream (in this case System.in) that provides additional ...
|
| random() | 11/9/2008 |
Q: how can you get one character at random from a string.is that possible or just random method work ...
A: To get a random character from a String, you simply need to pick a random integer up to the length ...
|
| random method | 11/6/2008 |
Q: how can you generate 6 numbers on range 1 to 49. by using Random nun = new Random() and using ...
A: The nextInt(n) method in Random will return an int at least 0, and less than n. E.g. nun.nextInt(10) ...
|
| How run() execute when start() invokes ,When we use Runnable interface ? | 11/6/2008 |
Q: I have a doubt in Threads section. How run() execute when start() invokes ,When we use Runnable ...
A: The easiest way to do this is to subclass Thread and override the run() method. After that, create ...
|
| multithreading | 11/5/2008 |
Q: does the instances of same thread have different copies of variables and methods?
A: Each thread has its own copy of local variables. Each thread may keep its own copy of fields, and ...
|
| Java code Hyperlink | 11/4/2008 |
Q: I am dessperatly trying to find out how to make a button go to a website in java. It for a chool ...
A: If you make a JButton do this, it will only work on Operating Systems that use Windows. There are a ...
|
| array | 11/3/2008 |
Q: "/*INPUT TWO STRING ARRAYS AND SORT THEM i need to accept two arrays as parameters and sort them ...
A: The reason that line does not work is that your sort method returns a String, but you are assigning ...
|
| How to read finger prints in java | 11/3/2008 |
Q: I want to read finger printing form Nitgen FP devices in my web application
A: This depends on what API there is available to use the device. Chances are the API has a c++ ...
|
| I want to be a good programmer | 10/28/2008 |
Q: I will like to be a good programmer as i have just finished from the University here in Nigeria as a ...
A: You can look at sun's tutorial: http://java.sun.com/docs/books/tutorial/ That will help you get ...
|
| Decryption problem | 10/27/2008 |
Q: I have a problem with a project, I am building a file encryption and decryption application in ...
A: The variable you are talking is never used. You decrypted the data, but you are not doing anything ...
|
| Simulating multiple mice within a drawing application? | 10/27/2008 |
Q: Scenario: 1 - System Mouse 1..9 - Simulated Mice Simulated mice input will be provided by our ...
A: The current system will work fine. Generate synthetic mouse events from the extra devices. This ...
|
| Zip to Exe | 10/23/2008 |
Q: I'm trying to write a program in java that will convert a zip file into a self extracting exe, with ...
A: The primary problem is creating an exe with java. You can look at various free libraries that ...
|
| Prime numbers | 10/14/2008 |
Q: My daughter is 13 and needs to know "Why are Prime Numbers important" Many Thanks
A: they don't seem to have any pattern, but they are easily understood. Today, prime numbers are used ...
|
| Core Java | 10/14/2008 |
Q: How to compare elements of type Long within two HashMaps and Delete the unique elements, in ...
A: There are various ways of doing this. One way is to dump all the elements from the first list into ...
|
| Core Java | 10/13/2008 |
Q: How to compare elements of type Long within two HashMaps and Delete the unique elements, in ...
A: A HashMap is a mapping between two elements. If the Long is a key in the map you can use keySet() ...
|
| Basic If/else statements | 10/10/2008 |
Q: The question I'm asked is: Write a program that asks the user to enter a month (1=January, ...
A: The problem is that getDays method should return the number of days, not print them out. Your main ...
|
| calculate sum in jtable | 10/9/2008 |
Q: i want to ask.Can you teach me how to calculate sum in jtable?For example i got rows of qty,price ...
A: You would do something like this: What you actually do once you get the value that was changed ...
|
| FirePropertyChange | 10/6/2008 |
Q: .. i would like to ask 1. what is the importance of firePropertyChange and the ...
A: 1. firePropertyChange allows listeners to be notified when a property change occurs so that they may ...
|
| binary system | 10/4/2008 |
Q: why binary system is used in data representation in computer?
A: Binary is used in digital computers because under the hood computers are simply a large number of ...
|
| loading images in java | 10/3/2008 |
Q: Artemus Probably the subject says it all. How can I load a .JPEG image in java?? Just the simplest ...
A: The easiest way depends on what you want to do with it. If you just want to display it on the screen ...
|
| enlarge java heapMemory | 10/3/2008 |
Q: and i tried to enlarge the heap by Java -Xmx but it wasn't useful is there other solution to enlarge ...
A: Java will only allow you to allocate as much memory as you have ram. An int is 4 bytes, so ...
|
| regarding threads in java in client-server program based on udp potocal | 9/30/2008 |
Q: server program:import java.io.*; import java.net.*; import java.lang.*; class UServer extends ...
A: This depends on what you mean by access. When you create your thread class you can pass any data ...
|
| java event handling | 9/15/2008 |
Q: I am using netbeans ide.how to focus next text field by pressing enter key in swing programming?
A: See the focus subsystem tutorial: http://java.sun.com/docs/books/tutorial/uiswing/misc/focus.html ...
|
| jdbc | 9/5/2008 |
Q: Artemus i would like to insert into my database a date in the format DD-MON-YYYY so far, i have ...
A: You can use the SimpleDateFormat class (java.text.SimpleDateFormat ) E.g. SimpleDateFormat format = ...
|
| creating an object from Class variable | 9/4/2008 |
Q: artemus I have the following code inside my main method /* code begins here Class personclass = ...
A: You can use (if you are linking with the person class): Person person = (Person) ...
|
| set CLASSPATH | 8/25/2008 |
Q: artemus i'm learning about packages in java i dont get the purpose of set CLASSPATH what is its ...
A: You put your classpath at the base of your working directory, where your package is located. javac ...
|
| set CLASSPATH | 8/25/2008 |
Q: artemus i'm learning about packages in java i dont get the purpose of set CLASSPATH what is its ...
A: The classpath is a list of locations to find java libraries. When you compile with javac you can ...
|
| Opening ,AVI Files From Java | 8/24/2008 |
Q: Hei, I am wondering is there any command or algorithm to open .AVI or any other not txt file Type ...
A: You can have Java launch external programs to handle these types of files. To do this on windows ...
|
| Video recording | 8/20/2008 |
Q: I am from kerala,india. I really like java. Now i want help from you to record video from USB port ...
A: You will have to get the Java Media framework library. Once you have it, you can use ...
|
| JAVA File Save | 8/17/2008 |
Q: Thanx for last answer. Now My Problem is "I want to let users to save the some txt content from a ...
A: You can use the getSelectedFile from the file chooser to get the file the user choose. From there ...
|
| JAVA Image | 8/14/2008 |
Q: I m Nirav from India doing MCA. I m working on a project in Netbeans 6.0. I want to hide one ...
A: You could hide an image in a jpg by adding it as meta data. In order to do this the hidden image ...
|
| java | 8/13/2008 |
Q: I am shukle parnash from Gujarat in India. I am student of MCA(Master In Computer Application) I am ...
A: This depends on what you mean by join. Do you mean append one audio file after another? or Have ...
|
| JAVA FILE OPEN | 8/5/2008 |
Q: Thanx for previous answers. Now I use JFilechooser to open a file from Hard Disk. Here I want to let ...
A: import javax.swing.*; import javax.swing.filechooser.*; import java.io.*; ... JFileChooser ...
|
| java warning messages | 8/2/2008 |
Q: Artemus I use the LinkedList class from java.util.* package in order to create a list of objects ...
A: LinkedList is a generic class and should be typed for the kind of elements you will have in the ...
|
| JAVA Problems | 7/31/2008 |
Q: how can i open a file from file chooser and edit and save it..? ANSWER: Getting the file from the ...
A: In notepad, or in a notepad like interface? To do this in notepad you would (and this only works in ...
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| file IO in java | 7/30/2008 |
Q: Artemus what is the most common way of reading a file (.txt file) and writing to a file in java?? ...
A: You can see the tutorial on reading text files in Java at: ...
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| JAVA Problems | 7/27/2008 |
Q: how can i open a file from file chooser and edit and save it..?
A: Getting the file from the file chooser is as simple as: JFileChooser chooser = new JFileChooser(); ...
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| exit in java | 7/25/2008 |
Q: Artemus I've written a try catch block of code if the catch executes, I want the program to ...
A: You can use: System.exit(0) to terminate the program at any time (assuming you are running an ...
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| java -> SOAP -> COM | 7/24/2008 |
Q: I'm trying to gauge what's involved in calling a COM object from java via SOAP. I can probably ...
A: I'm not sure if there is any good way to do what you want. What I would do is write a COM wrapper ...
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| Please!Please! help me to write this program | 7/18/2008 |
Q: write a program to input the values of three coefficients of a quadratic equation ...
A: Just use the Quadratic equation (http://en.wikipedia.org/wiki/Quadratic_equation) Have a test in ...
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| Custom Java cursor on Linux | 7/15/2008 |
Q: I'm creating a custom cursor using png 16x16 images. The images are rendered perfect as a cursor on ...
A: Thats hard to say as I don't have Linux and it might be an issue with your distro or the version of ...
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| PDF to jar | 7/14/2008 |
Q: is there a way that i can convert PDF files to Jar? so that i can share my ebooks with my friends ...
A: You would need to include a PDF reader in the jar then. If you can find one with an open API then ...
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| java problem (urgent) | 7/14/2008 |
Q: i want to update my database using JTable in swings and jdbc to it... iam using prepared statement ...
A: You could use the default table model, but it is probably more complex as you would have to add ...
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| passing enums as parameters in Java | 7/13/2008 |
Q: My question is about enum types. Is it possible to pass them as parameters in methods and ...
A: In order to import anything it cannot be in the default package. packages are like namespaces, and ...
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| passing enums as parameters in Java | 7/12/2008 |
Q: My question is about enum types. Is it possible to pass them as parameters in methods and ...
A: Enums are classes but with a set of predefined values. As such you must both declare the enum and ...
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| javaw | 7/11/2008 |
Q: One of my application use Javaw , server OS is windows 2003. I am facing a strange problem from last ...
A: javaw is the executable that many java programs use when they do not have a command prompt. If you ...
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| information | 7/9/2008 |
Q: i m nilesh megha, i m doing mca in india, i have to develop websearch engine in core java so please ...
A: You can start by indexing pages. See: ...
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| java problem (urgent) | 7/9/2008 |
Q: i want to update my database using JTable in swings and jdbc to it... iam using prepared statement ...
A: The query you have is fine, but does not work with your current database. This generally happens ...
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| THIS IS SO IMPORTANT | 7/8/2008 |
Q: I was wondering would you please tell me: is it important to update the java for the internet? ...
A: Newer versions of Java may be more secure, faster, and support applets that use the newer ...
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| updating JTable(URGENT) | 7/7/2008 |
Q: i want to edit the cells in JTable which takes its data from a MS-Access database and those edits ...
A: For your first question, I can't really help with that since I don't have your database (or even ...
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| Random Ovals | 7/6/2008 |
Q: What I am trying to do is draw ovals to "erase" the graphic. The ovals should appear randomly when ...
A: You are getting a blob since you are painting 20 ovals, all of which are really close to each other ...
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| updating JTable(URGENT) | 7/5/2008 |
Q: i want to edit the cells in JTable which takes its data from a MS-Access database and those edits ...
A: Not having too much skill with databases, I've made up a simple example of what you want... you can ...
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| updating JTable(URGENT) | 7/2/2008 |
Q: i want to edit the cells in JTable which takes its data from a MS-Access database and those edits ...
A: In your Connection object (assuming you are using the java.sql package) you would first turn off ...
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| If Else statements and ; expected | 7/1/2008 |
Q: I am using If Else statements in a form of repeating Else If statements. If (calculated = 10); { ...
A: The compiler is very confused on what you are trying to do since this has many problems. The ...
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| JNI | 6/26/2008 |
Q: Sir , I want to Access Windows Core (Kernel) DLL's in java program please help with a complete ...
A: You have a couple of options... Java only supports calling native code if the name of the function ...
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| unicode | 6/22/2008 |
Q: i would like to display an Arabic (Unicode) String of characters (enter by user in Jtextarea) from ...
A: In the pre init code of the component you can set the orientation to left to right overriding the ...
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| passing arguments between frames | 6/21/2008 |
Q: I am trying to write a code in java to do the following: i got an interface for the user, it ...
A: When they hit submit you can either hide or dispose of the frame (depending if you plan to use it ...
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| java problem | 6/21/2008 |
Q: i am trying to do internet transaction but when it loads the login page of the bank website i get ...
A: There is a problem with the applet loading. You can open the Java console (under the tools menu) and ...
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| Tomcat error | 6/16/2008 |
Q: I am facing this error and as i am quite new to java i am not sure what error is this. if ...
A: Although I don't have experience with servlets, the error indicates that you are missing a library ...
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| printing a panel | 6/14/2008 |
Q: I am currently writing a piece of software, a sort of database type thing. I have a form which ...
A: I tried your PrintUtilties class with some sample code below: import javax.swing.*; import ...
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| 64bit Windows2003 filtering the entries of regedit when invoking by Runtime.exec() | 6/11/2008 |
Q: I am creating a process and with that process am invoking a batch file. Content of Java program: ...
A: The output of the batch file (and by extension regedit) is not automatically redirected to standard ...
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| progress bar | 6/5/2008 |
Q: i am working on a project called web spider where i am displaying all the hyperlinks of a web ...
A: When you have a URL, you can use getConnection to get a URLConnection. From there you can call ...
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| gui | 6/5/2008 |
Q: my project has an interface, so whenever i execute my program i get that interface itself...but i ...
A: The difficulty of this depends on how you are doing loading. In order to show a progress bar there ...
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| Applet notinited | 6/4/2008 |
Q: I need help over here I made one simulation applet using the NetBeans IDE. When I run my simulation ...
A: Some exception was probably thrown in the init, possibly a security issue or a missing resource. In ...
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| difference between jdbc and ADO | 6/2/2008 |
Q: what is the difference between jdbc and ADO(Active Data Object) . Please explain me in detail.
A: jdbc is generally what java programmers use to access a database, while ado is generally what ...
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| Images | 6/2/2008 |
Q: I am trying to add an image to a swing panel, with the following code... String location = (String) ...
A: If you don't give the proper path of an image no error is thrown, you will simply not get an image. ...
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| Java | 5/31/2008 |
Q: I am writing a program in NetBeans. I need to use the "or" operand and I can't figure out how to ...
A: If you are using a standard American keyboard, you would press SHIFT=\ which should be |. On many ...
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| draw arc | 5/30/2008 |
Q: . i have problem to draw a arc in java.. i want draw a arch from pixel to pixel but not use method ...
A: If you have the coordinates in this format, you can use Path2D.Float (or GeneralPath if you aren't ...
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| string variable, user input | 5/26/2008 |
Q: I'm supposed to ask the user for the manufacturer, model, etc... of an aircraft. The answers to the ...
A: Yes, you can do the same for a model. Then you want to create a class that can keep all of these ...
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| saving in a folder | 5/25/2008 |
Q: I am working on a project web spider. i am storing the web pages selected by user so that user can ...
A: Unless your program is running, there is no way to delete a file after a set period of time. When ...
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| .bat file | 5/25/2008 |
Q: i want to create a .bat file for my project so that i can double click on it and execute it. i tried ...
A: You might have the classpath configured incorrectly, or the batch file is not opening in the correct ...
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| Wont print credit card number | 5/25/2008 |
Q: I am having problems printing the content of my objects that are in my arrayList. What I have now ...
A: You mispelled creditcard in your constructor's paramters, as a result when you assign the value, you ...
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| string variable, user input | 5/24/2008 |
Q: I'm supposed to ask the user for the manufacturer, model, etc... of an aircraft. The answers to the ...
A: When you save something numerically, it is converted from a string to some other kind of data. ...
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| Printing objects from an arrayList | 5/22/2008 |
Q: I am having problems printing the content of my objects that are in my arrayList. What I have now ...
A: If its just printing the customer's address, then you will need to fix the toString() method in the ...
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| .bat file | 5/21/2008 |
Q: i want to create a .bat file for my project so that i can double click on it and execute it. i tried ...
A: The java command does not take the name of the source program as you have suggested, but rather the ...
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| JAVA | 5/20/2008 |
Q: I am shukle parnash from Gujarat in India. I am student of MCA(Master In Computer Application) I am ...
A: I am still not sure what you are trying to accomplish here. The FileLock API is not designed to ...
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| hello | 5/20/2008 |
Q: can you please explain me recursion. also please give me hint to make a program to convert the ...
A: You can find information about recursion on wikipedia: ...
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| Sending a download request through local internet proxy | 5/18/2008 |
Q: My project is about downloading files from internet by specifying direct url. E.g. ...
A: You can define a subclass of ProxySelector and implement the select method that gives a proxy based ...
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| Extract Text With XML | 5/17/2008 |
Q: Harper My question is: I have a .txt file and I would extract some words from this file. To ...
A: If you like using xpath, the class exists in the javax.xml.xpath package. Or if you perfer to ...
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| saving in a folder | 5/17/2008 |
Q: I am working on a project web spider. i am storing the web pages selected by user so that user can ...
A: Simply create a File object that points to the file you want to delete and call delete(). If this is ...
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| saving in a folder | 5/16/2008 |
Q: I am working on a project web spider. i am storing the web pages selected by user so that user can ...
A: Instead of using new FileOutputStream(localFileName)); use: new ...
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| Java | 5/16/2008 |
Q: Sir, I want to create a circular progressbar in my Project.Please provide me the source code for ...
A: There are various exe wrappers available, you can search for them based on your needs. Note that ...
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| Encryption/Decrypt;ion in C via JNI | 5/15/2008 |
Q: I am using openssl des algorithm for encryption and decryption.I have a java program which will send ...
A: Hard to say what is happening. I would suggest that you run java with -Xcheck:jni to enable jni ...
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| java gui | 5/14/2008 |
Q: I have a question about how java GUIs and all GUIs are able to layout objects. I just got into GUIs ...
A: The idea is to swap each card with another card later in the deck (including itself), effectively ...
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| Java Frame | 5/14/2008 |
Q: Sir, Thanks a lot for providing me the answer of my previous question.Now I can easly access the ...
A: It sounds like you are adding components after you display the frame. Make sure that you don't set ...
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| Java | 5/14/2008 |
Q: I am trying to open a PDF file with the dialog box open/save/cancel. The code which i have written ...
A: Stating that you have an attachment is not enough you actually have to upload it. E.g. ...
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| GUI | 5/12/2008 |
Q: I have developed a DAC(download accelerator) ! now , i want a borderless frame containing only an ...
A: If you just want an image you can start java with -splash:<imagepath> to show that image. You can ...
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| JAVA | 5/11/2008 |
Q: First of all thank you very much sir that you are solving my queries thank you very much I am ...
A: The lock is reentrant. Just like other locks, locking on the same thread more than once won't block. ...
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| Execute Java File | 5/6/2008 |
Q: Harper When I execute a Java file into Netbeans IDE, it shows the following message compile: ...
A: It looks like you are running a program as part of the build step. So, in order to run it correctly ...
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| Java program to check drive capacity ! | 4/27/2008 |
Q: I am working on a "Download Accelerator" project. "I have to somehow figure out a way to check my ...
A: If you are using Java 1.6 you can use: getUsableSpace() and getTotalSpace() which are both methods ...
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| accessing file in subfolder | 4/25/2008 |
Q: well I know the name of the file while I'm in the main method, but it exists in a sub folder of ...
A: You can either put a / or a \ between the name of the directory and the file name. E.g. File file = ...
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| TimeZone related problem | 4/24/2008 |
Q: Hope you are doing good. I have a very basic java question related to Timezone apis. When we call ...
A: You could probably get a good matchup by using a combination of getting the system property ...
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| splitting an image | 4/23/2008 |
Q: am marla from brunei. Basically, am a student in computing and currently am doing jigsaw puzzle ...
A: If you have the image as a BufferedImage you can call getSubimage(int x,int y, int width, int ...
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| Reflection api | 4/22/2008 |
Q: Easy way to find what classes are is specified package (in runtime)
A: Simple answer: You can't. The class loader works as a discovery process and classes are not located ...
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| java swings | 4/12/2008 |
Q: how to pass values from one frame to another.consider that a student provides his reg.no in form1 ...
A: how to pass values from one frame to another.consider that a student provides his reg.no in form1 ...
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| Deriving a list of Prime numbers | 4/9/2008 |
Q: i already created my list of prime numbers which is the one bellow public class PrimeNumber { // ...
A: > I'm a bit confused about creating a list of empty prime numbers in an ArrayList. You can create ...
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| Dice Simulation | 4/5/2008 |
Q: My programming teacher gave me thisWrite a program that will simulate the result of throwing of a ...
A: Math.random() will return a double between 0 and 1 (not including 1). So if you want a value between ...
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| java and java script | 3/30/2008 |
Q: what is java and java script?
A: Short answer: Java is a programming language similar to C that allows the developement of advanced ...
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| urgent need " display data in JTable" | 3/29/2008 |
Q: and I work on project which is to display many data "Vector "from diferent source in one Jtable ...
A: I can understand you are having some trouble with JTable, but unless you can state your exact ...
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| get the output of a background process | 3/28/2008 |
Q: I'm trying to use the output of a background process but I just have problem , the file result.txt ...
A: The > operator doesn't work with the exec method, you can only use that to actually execute ...
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| Chat RMI using Java | 3/27/2008 |
Q: hye, i am doing the java RMI chat program and been asking NZ all this while, but somehow she on ...
A: For some reason there was a security policy installed that prevented you from attempting to make ...
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| java | 3/26/2008 |
Q: Hai. Am new to java. I need a java program to search and download video files from local system. Can ...
A: You can use the File API to find out about files on your local system and determine what the ...
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| image processing in java | 3/24/2008 |
Q: can i read images of 600 Mega byte and display them in a window using java.can i also perform some ...
A: If you simply want to display an image you can use the ImageIcon class. Here is a simple piece of ...
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| java.io.BufferedReader | 3/24/2008 |
Q: How do BufferedReader and FileInputStream help in downloading files(txt,audio,video) from internet ? ...
A: If you look at the example code I provided earlier, you will see that you can use it to download any ...
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| about javax package | 3/24/2008 |
Q: actually I,m a student. I,m doing some basic programs in java but I,m facing the problems reguarding ...
A: There is no javax package, there is however javax.swing which is part of the JDK. If you are missing ...
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| image processing in java | 3/23/2008 |
Q: can i read images of 600 Mega byte and display them in a window using java.can i also perform some ...
A: Sure you can, provided you have enough ram on your computer. If you are planning to do use heavy ...
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| Socket Programming: Threading to Listen on Multiple Ports | 3/22/2008 |
Q: I am in the process of writing a server side application that would allow listening on multiple ...
A: The problem is that you have multiple threads going at each port so you could get multiple ...
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| java.io.BufferedReader | 3/21/2008 |
Q: How do BufferedReader and FileInputStream help in downloading files(txt,audio,video) from internet ? ...
A: If you just want to display an image on the net you can use: Image im = ...
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| java.io.BufferedReader | 3/20/2008 |
Q: How do BufferedReader and FileInputStream help in downloading files(txt,audio,video) from internet ? ...
A: FileInputStream will not help in downloads (since its only for local files). The BufferedReader is ...
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| Socket Programming: Threading to Listen on Multiple Ports | 3/18/2008 |
Q: I am in the process of writing a server side application that would allow listening on multiple ...
A: The simplest way of doing this would be to change: String port1024 = ss1.portListen(1024); ...
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| Java WebCrawler | 3/17/2008 |
Q: I have downloaded the code for the webcrawler from the Java website. I have it running except for ...
A: guessContentTypeFromStream is a best guess about the content type and should only be used if ...
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| Manipulating BMP in JAVA | 3/17/2008 |
Q: I am doing a project on Fingerprint recognition..for that i need 2 retreive pixel values from a ...
A: Assuming you have the image in a BufferedImage (ImageIO class gives various ways to load an image ...
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| Hello | 3/16/2008 |
Q: how r u? i hope u r fine, i want to ask how to draw a chess board in the console not GUI and please ...
A: You could draw a chess board like this: ---------------- |R|N|B|K|Q|B|N|R| |P|P|P|P|P|P|P|P| | | | | ...
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| simple dictionary | 3/14/2008 |
Q: could you please help me to make a code to program simple dictionary? please, because I still ...
A: The HashMap class is a dictionary. You could build an implementation on top of that, to make your ...
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| java code | 3/14/2008 |
Q: hai friend, we need java coding to http traffic generation. The program generate series of request ...
A: You can use the URL class to create requests to the server. Once the URL is created you can use ...
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| Java exceptions... | 3/13/2008 |
Q: Exception in thread "main" java.lang.NullPointerException at ...
A: You commented out the initialization of the button: //b2 = new Button("Update"); Thus, b2 remains ...
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| JAVA | 3/8/2008 |
Q: I am shukle parnash from Gujarat in India. I am student of MCA(Master In Computer Application) I am ...
A: For any kind of mobile development you will want to use J2ME. I haven't used J2ME, so I would not ...
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| Lotus Notes session | 3/5/2008 |
Q: Im writing app that connect to Lotus Notes database and retrieves some data.This database is ...
A: You cannot directly connect JNI in .NET to Java code, since JNI methods must be exactly formed in a ...
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| use of finalize() destructor | 3/5/2008 |
Q: I read an answer on how to create a destructor in Java where you said: "To add a destructor use: ...
A: You don't call finalize; it is called for you automatically when the object is garbage collected. ...
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| Reading char from file | 3/4/2008 |
Q: I am trying to read the char with the max frequency in a file but this code seams it doesnt ...
A: Well this will only give the highest occurrence of a character that appeared with a line, not the ...
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| Creating multiple jvm in a single systems | 3/4/2008 |
Q: Can any one give me a simple example for creating and running multiple jvm in a single machine. ...
A: So, the bigger problem is seems to be: how do I attach a java program to an already running jvm. ...
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| Problem changing the color for items on a JComboBox | 3/2/2008 |
Q: I'm trying to make a JComboBox with different colors for each item in the List both when the popup ...
A: The problem is that the JComboBox UI sets the foreground according to the OS stand foreground ...
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| Cannot select JTable Row | 3/2/2008 |
Q: I fill jtable with data from db.now the problem is i cannot select rows in the jtable.what is the ...
A: Assuming that the data is filled in correctly there is no reason that it coming from a database ...
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| Problem changing the color for items on a JComboBox | 2/29/2008 |
Q: I'm trying to make a JComboBox with different colors for each item in the List both when the popup ...
A: Instead of returning your own JLabel, you are probably better off extending the ...
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| JComboBox Selection | 2/28/2008 |
Q: I have added items like(Apple,Orange,Grapes,Banana) in JComboBox and displayed it.It works fine. But ...
A: This is how combo boxes normally work. What happens if someone selects something in the middle? Then ...
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| permutations | 2/28/2008 |
Q: I am not sure how to best do permutations. I have 5 functions (a - e). Every function does something ...
A: Well, it is hard to avoid for loops, but you can limit it to 2. What you do is keep an integer that ...
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| adding binary | 2/28/2008 |
Q: i want to add 2 binary numbers together mostly using string manipulation. i do NOT want to convert ...
A: Well, the problem is that if you read them from left to right, you will need to see the next one, ...
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| append data | 2/26/2008 |
Q: I want to append data to an already existing file.I dont want to lose any data. I did it using ...
A: When you create the outputStream for the file (or filewriter) add a true as an extra parameter to ...
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| Need to generate unique transaction IDs | 2/25/2008 |
Q: In my project I need to generate unique transaction Ids for each request.It has to be 6 digit ...
A: The ID you would use depends on what format you want. If you don't really need random ones, you can ...
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| JAVA | 2/19/2008 |
Q: I am shukle parnash from Gujarat in India. I am student of MCA(Master In Computer Application) I am ...
A: You would only use J2ME if you plan on having the program run on mobile devices. Netbeans is just an ...
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| JTable | 2/19/2008 |
Q: what is a model in jtable.where other swing components doesn't need to follow any model.and how can ...
A: Most swing components use a model, you often use the default one, since it is good enough for what ...
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| about checked exception in anonymous classes | 2/18/2008 |
Q: Please have a look on the following statment... "Initializer expressions in named classes and ...
A: import java.io.*; public class Test { public void foo() throws FileNotFoundException { ...
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| edge detection, RGB, barcode | 2/15/2008 |
Q: Can you or anyone please help me how to use or code of edge detection and also how to adjust the RGB ...
A: If you are reading the barcode not at an angle (or not a large angle). You could start half way ...
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| edge detection, RGB, barcode | 2/14/2008 |
Q: Can you or anyone please help me how to use or code of edge detection and also how to adjust the RGB ...
A: If you have a BufferedImage of the barcode you can use the getRGB and setRGB methods to filter out ...
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| submit a button using swings | 2/13/2008 |
Q: How can i submit my form in a database using submit button? By using java Swings
A: Well... you would create an SQL query based on the input from the form data, open a connection to ...
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| How to read from MS Excell 2007(xlsx) | 2/12/2008 |
Q: actually problem is that. HSSF is the POI Project's pure Java implementation of the Excel '97(-2007) ...
A: You can hook up your java code to C code. Read up on the JNI, or just have a MS application running ...
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| JAVA | 2/9/2008 |
Q: I am shukle parnash from Gujarat in India. I am student of MCA(Master In Computer Application) I am ...
A: You can use a FileInputStream to read bytes from a file. You can use a InputStreamReader to convert ...
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| search code in servlet for search keyword in given file | 2/7/2008 |
Q: i wanna java code for searching particular keyword in given file of given folder. hints-suppose we ...
A: You can use the File.listFiles() method to get a list of all the files. For each file you can use a: ...
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| Retrieve from database | 2/7/2008 |
Q: I have some tables in database. How to retrive it and put it in Hashmap? For Ex: I have Tables like, ...
A: This heavily depends on how your database is setup. For the most part you take your ResultSet that ...
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| Propblem with Runtime.exec() | 2/7/2008 |
Q: I was trying to restore my database using java. I had a problem with backup also,that i have solved. ...
A: You will need to manually pipe in the file. E.g. FileInputStream in = new ...
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| Question about random access files. | 2/6/2008 |
Q: I want an extremely large array of extremely large numbers, so I have this in my code: long N = ...
A: Yes, it will. An example of this would be: import java.io.*; ... File f = ...
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| is string mutable/immutable | 2/6/2008 |
Q: import java.io.*; class string1 { String str; void content(String str) { this.str=str; } ...
A: The class String is immutable, The classes you made called string and string1 are as mutable as you ...
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| long array size | 2/5/2008 |
Q: I want an extremely large array of extremely large numbers, so I have this in my code: long N = ...
A: You do realize that if you want the entire array in memory you will need almost 8 gigs of ram! If ...
|
| Retrieve from database | 2/5/2008 |
Q: I have some tables in database. How to retrive it and put it in Hashmap? For Ex: I have Tables like, ...
A: What you can do is map the key values from the table of each entry as the key of the hashmap and the ...
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| SWT | 2/5/2008 |
Q: how r u? i want to ask what is SWT in GUI and is there any book's which i can read about it thanx ...
A: SWT is the standard widget toolkit. It is an advanced form of the AWT that uses OS GUI components ...
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| Hashmap | 2/3/2008 |
Q: What is the use of Hashmap? Can we use Hashmap to construct a JTree like this.. Ntwk ++Node1 ...
A: You could represent a tree with a HashMap (You could also use a TreeMap if you want to keep stuff ...
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| Plz Help me | 2/2/2008 |
Q: how r u? i hope u r fine i want to ask a question not related to the programming but it's important ...
A: Well it depends on what you mean by 'real' engineer. You could call yourself a software engineer, ...
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| java j2se 1.5 run time error | 2/2/2008 |
Q: i worte a simple prog in java..it compiled but at run time it showed exception in thread "main" ...
A: Chances are there is a problem with the classpath enviromental variable. Assuming you are not using ...
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| how java works | 1/30/2008 |
Q: i wanted to know if there is any book or reference out that will teach how java is able to take a ...
A: There are two parts to what you are asking: 1. Recognizing the syntax. This is the transformation ...
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| How to read from MS Excell 2007(xlsx) | 1/28/2008 |
Q: actually problem is that. HSSF is the POI Project's pure Java implementation of the Excel '97(-2007) ...
A: Probably not any pure java implementations are available at this time. If you are willing to use JNI ...
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| question | 1/28/2008 |
Q: why to introduce encapsulation in java?what is the use of encapsulation? ANSWER: You can find an ...
A: Encapsulation doesn't have rules and regulations. Encapsulation simply hides data, possibly limiting ...
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| java | 1/24/2008 |
Q: My name is Shukla Parnash. I want to know that how I can create jar file and exe file of the java ...
A: To create a jar you can use the jar utility in the SDK, or if you are using an IDE such as Netbeans ...
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| hi | 1/22/2008 |
Q: import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import ...
A: Having not done any JSP code, I may not be able to help you on this. But I really would not have any ...
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| JAVA | 1/16/2008 |
Q: I am developing the Data Encryption Software in java Netbeans 5.5. I want to know that how I open ...
A: To read the text of the File you will want to use a Reader. E.g. to read plain text that has the ...
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| java | 1/14/2008 |
Q: I'm a student and currently using netbeans IDE 6. Can i ask some codes how to communicate with my ...
A: For this you will have to use JMF (see http://java.sun.com/products/java-media/jmf/index.jsp) I ...
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| help me with this exersice | 1/9/2008 |
Q: hey thanks for ur reply.I want to ask u about an exersice in the book here it is with my code: ...
A: The modifications to the loops are good, but you still need to fix the "if( eindex < 9)" line to be ...
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| help me with this exersice | 1/9/2008 |
Q: hey thanks for ur reply.I want to ask u about an exersice in the book here it is with my code: ...
A: There is a problem with the for loop since i is still incremented even if a seat is not assigned. ...
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| reply 4 previous answer | 1/9/2008 |
Q: ya,a lot of expert says that its more easy to using hashmap, but my lecturer want me to using SQL to ...
A: Well using SQL in java is not too difficult, easier than doing it in C, there are vaious tutorials ...
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| how to create a translator using java | 1/8/2008 |
Q: good day sir. im a last year student in my college, and given a project to create a ...
A: You could use SQL to do this, but with only 2000 words you could just as easily use one of Java's ...
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| Java | 1/6/2008 |
Q: I have a computer with windows xp, i am unable to run games from POGO on this computer, it tells me ...
A: If its your computer you probably are an administrator. If you are an administrator you can open the ...
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| Util.Date | 1/4/2008 |
Q: how to find out number of sundays in a year through java program?
A: One way (not the most efficient) using the Calendar class would be: int year = ...; Calendar c = ...
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| JAVA | 1/4/2008 |
Q: What is JAVA and how does a computer technician use it. Please reply in simple language as I am ...
A: Java can refer to 3 related things: 1. A programming language that allows programmers to write ...
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| Socket Programming | 1/3/2008 |
Q: This may be a little long-winded but bare with me. I am trying to write a simple Client Server Java ...
A: I don't know what the error is, but it might be with the parsing of the input into an integer... if ...
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| question | 12/28/2007 |
Q: class Hello{ static { System.out.println("All Experts Group"); System.exit(0); } }
A: No question here, but... Yes, this program will print out "All Experts Group" and then exit even ...
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| question | 12/27/2007 |
Q: i want to find out number of occurance of each character in a given string for example --- Hello , ...
A: This can be done with a simple HashMap: import java.util.*; ... String str = ...; ...
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| java -swings(JTable) | 12/26/2007 |
Q: How to create JTable using Vector class. please give me the example for creating table using Vector ...
A: Although I don't recomend using the JTable constructor using Vectors. All you need is a Vector of ...
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| Java visual program | 12/24/2007 |
Q: I am in need of a program which takes a card design and adds customer input. The resultant card is ...
A: Although I haven't used jsp that much... Lots of websites allow uploading images (e.g. forums to ...
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| Icon | 12/24/2007 |
Q: if i have code like below, can i put an icon into a path. for example i have array 5*5, can i put an ...
A: It depends on what the 'icon' is. If its an instance of the Icon interface then you can simply call ...
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| Regarding to Abstract classes in Java | 12/22/2007 |
Q: An abstract class cannot be instantiated (why?)
A: Abstract classes cannot be instantiated since they can contain abstract methods that do not have ...
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| Package in java???? | 12/19/2007 |
Q: What is package? Why are using package & Which purpose used to package? How are use to package in ...
A: A package is like a namespace. It divides up classes and ensures that name collisions do not happen. ...
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| Interface???? | 12/18/2007 |
Q: What is interface? Why are use interface ? How are use interface ? Why multiple interface allowed ...
A: See http://java.sun.com/docs/books/tutorial/java/concepts/interface.html Multiple inheritance is ...
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| how methods and arguments work | 12/16/2007 |
Q: What is a method and how do arguments work? Like when you print System.out.print("Text") how does ...
A: System.out.println is a bit complex: 'out' is a static field in the system class that is of type ...
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| args[0] | 12/16/2007 |
Q: and i ve faced this problem, and hope to help me to solve it if you don't mind. this is my simple ...
A: This code seems fine. Make sure when you are running the program you add the argument when you run ...
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| java | 12/15/2007 |
Q: what is use of Abstract classes,polymorphism and interface. when we will use in these three aspects? ...
A: The class AbstractList http://java.sun.com/javase/6/docs/api/java/util/AbstractList.html is an ...
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| asking a swing question | 12/13/2007 |
Q: helllo i want a source code for rotating an image inside a thumbnail as like used in facebook.com ...
A: I have not used facebook but, If you have a big enough area to draw the picture in, you can use the ...
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| doubt in SCJP 1.4 | 12/10/2007 |
Q: Given: 1. public class ExceptionTest { 2. class TestException extends Exception {} 3. public void ...
A: The answer is not B, it is A. Since test() calls runTest(), and runTest() throws an Exception that ...
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| String Inversion | 12/7/2007 |
Q: i awnr to ask how to invert a string using recursion recursion is a must? example"Hello to ...
A: Assuming you have String s = "Some interesting string" You can get the first word with: String ...
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| Oop Concept in Core Java | 12/4/2007 |
Q: If we defined constructor(User define construct) in base class & derived class but not define ...
A: There is no problem in doing this, just make sure you make a call to the constructor you want to ...
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| Java Network Traffic Generation | 12/3/2007 |
Q: I want to develop a server program that upon request from client, sends TCP and UDP packets to ...
A: You can probably use datagrams ...
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| BFS | 11/30/2007 |
Q: here i have dfs and idfs code for 9 puzzle solving, but how to use BFS? can u help me to make the ...
A: You cannot use recursion for a bfs. Instead you have to keep a FIFO queue of the puzzles (such as ...
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| overriding | 11/30/2007 |
Q: how is method overriding experienced in java? for example there is no overriding if there are two ...
A: Overriding occurs when one class inherits from another and the subclass defines a method that has ...
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| Exiting Aprogram | 11/29/2007 |
Q: i want to kone how to exit a program if the conditions are not executed in but don't use ...
A: A program can exit normally if all the non-deamon threads end. For example, if you simply have a ...
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| Use of inner classes | 11/29/2007 |
Q: What is the use of "Inner classes". When we will use these classes. ANSWER: Inner classes allow you ...
A: You can do everything you want without inner classes in java. They are there to help make organizing ...
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| Use of inner classes | 11/29/2007 |
Q: What is the use of "Inner classes". When we will use these classes.
A: Inner classes allow you to do several things. 1. Naming, if you have a class whose only purpose is ...
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| file streams | 11/21/2007 |
Q: i want to ask how to (read) data from the console and save it in a txt file (write it) using ...
A: If you want to use some other terminator e.g. user types in "END" you could add a check before ...
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| file streams | 11/21/2007 |
Q: i want to ask how to (read) data from the console and save it in a txt file (write it) using ...
A: Here is a simple example of reading from a stream, and writing it out to the file specified until ...
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| moving | 11/20/2007 |
Q: How do you make a move random of the two dimension array with a 15 * 15 grid
A: You can use the Random class to make random movements. If you are on the edge, you only have 3 ways ...
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| How to find a number a float o not | 11/19/2007 |
Q: i want to knoew how we can know that a number is float or not? please without converting the number ...
A: If you want to know if a number can be represented exactly as an integer you could: double myDouble ...
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| Menu popup with Dynamic Value | 11/15/2007 |
Q: Hell Sir, Can we create menu popup with dynamic value. i.e. we require that user enter the value in ...
A: Sure you can, just use setText on the JMenuItem to change the text of the menu item. You can also ...
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| files | 11/15/2007 |
Q: is there any Statement like S.o.p in java to print into file
A: I am not familiar with S.o.p Usually when a user wants to print to a file they select print and ...
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| connect algorithm | 11/13/2007 |
Q: How are you? I'd like to ask for your opinion regarding a programming obstacle I have. I have a ...
A: If the points are fairly clustered you could create a 2 dimensional array of linked nodes. The first ...
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| help | 11/7/2007 |
Q: good morning ,I'm not well in English but I try to explain you my problem (excuse me) I'm a student ...
A: It is possible (but not simple) to call VB functions from Java (or the other way). To do this you ...
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| puzzle | 11/6/2007 |
Q: can u tell me why this code cannot work?? it said cannot find symbol. can u tell me what the ...
A: You have a constructor that takes in an int[][]. In your main you have to supply that int[][]. ...
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| help | 11/4/2007 |
Q: good morning ,I'm not well in English but I try to explain you my problem (excuse me) I'm a student ...
A: There is no special Java package for Arbic. You do not need to do anything special to display ...
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| java doubt | 11/3/2007 |
Q: I would like to create a textbox, a button and few other swing components and would like to ...
A: For a dynamic UI as you have described the simplest solution would be to not use an IDE editor to ...
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| String | 11/1/2007 |
Q: How can we make a user enter a String from the console as an input thanx Egypt CSD
A: import java.io.*; ... BufferedReader inputReader = new BufferedReader(new ...
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| Help | 10/30/2007 |
Q: 1.Write a program to produce the following form. 1 1 2 1 1 2 3 2 1 1 2 3 4 3 2 1 ...
A: 1. There are various ways of doing this... here is a "clever" solution. You could also use a second ...
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| Notes initialization failure - err 421 | 10/29/2007 |
Q: im working on support tool for out team and I have to use Lotus Notes to send mails and fill ...
A: Instead of changing the path variable, I would simply set the start directory to the location you ...
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| A Judagrali series | 10/26/2007 |
Q: I'm the java student doing web development using servlets and JSP's can you please help me with this ...
A: Yes, the ^ is the bitwise operator in java, but ^ is used as the power operator in many other ...
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| A Judagrali series | 10/25/2007 |
Q: I'm the java student doing web development using servlets and JSP's can you please help me with this ...
A: The requirement of P being prime here is not needed, since any prime in the form 2^p-1 will have p ...
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| java | 10/21/2007 |
Q: i am going to make a simple DFS, from the coding below, is it right? and can u help me if i want to ...
A: The program you have does not properly solve mazes, it will back up once, and assume the area below ...
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| how to access winamp controls(buttons like play etc ) through java program | 10/10/2007 |
Q: sir t want to control winamp buttons through java program. e.g if any command like play is invoked ...
A: Since winamp doesn't have a java interface, you would either need to make one yourself (very ...
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| java random character | 10/8/2007 |
Q: hey! just wanna ask how will i randomize my set of questions? like if i have 3 sets of questions ...
A: You can use the Random class in java.util to get random numbers... for 'shuffling' things what you ...
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| Polymorphism definition | 10/6/2007 |
Q: Can you please give me a definition of polymorphism in Java ? I do have a vague idea but ...
A: Polymorphism allows you to create a subclass of an existing class and redefine how a method works, ...
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| method overriding | 10/4/2007 |
Q: For method overriding, whether the return types and the number of arguments in both super and sub ...
A: The method parameters need to match in order to override the method. However (in java 5) the return ...
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| abt to start a project | 9/27/2007 |
Q: sir i am abt to start my work upon a project which serves as a part of my college curriculam. but i ...
A: There are various interesting projects you could start, but this largely depends on the amount of ...
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| java | 9/25/2007 |
Q: what is the difference between hashcode and reference number in java?
A: The hashcode for each java object can be overriden by the implementing class and may not be unique ...
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| Cloning | 9/20/2007 |
Q: can u explain me a java program that uses clone
A: The clone method (in object) will create a new instance of the class with all the values of the ...
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| getch() in JAVA | 9/12/2007 |
Q: please could you tell me how to replace the c instruction getch() with something else in Java but ...
A: For console input java doesn't have any equivalent to getch. If you really need that function you ...
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| write result set to diffrent format(csv,xml,pdf,html) | 9/11/2007 |
Q: How to write jdbc result set in to diffrent formats based on user selection(csv,html,pdf,xml) and ...
A: This depends on the data and must be done differently for each format. csv would be fairly simple ...
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| Java + Linux + Remote Boot = Focus problem | 9/6/2007 |
Q: this is the first time I ask a question at AllExperts and looking at your profile I saw that you had ...
A: My best guess would be that a component (possibly invisible) that is loaded post boot is taking ...
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| write into csv file | 8/29/2007 |
Q: I want to write some data into a csv file fetched from the database using java. Can you please help ...
A: import java.io.FileWriter; //add to import list import java.io.Writer; ... String fileName = ...
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| write into csv file | 8/29/2007 |
Q: I want to write some data into a csv file fetched from the database using java. Can you please help ...
A: Writing a csv file is very easy. e.g. import java.io.*; ... try { FileWriter writer = new ...
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| problem with swing delay | 8/28/2007 |
Q: Im currently working on small tool which should help us in our work and I found very interesting ...
A: If you are not updating the JList on the gui thread, updates may not happen properly. Use: ...
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| bit representation | 8/26/2007 |
Q: PLease can you give me a detailed explanation about why range of byte datatype is -128 to 127. Since ...
A: The first bit is used for the sign the other 7 are for the value. Languages that have a max value of ...
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| Host Access Class Library X Host Access Beans | 8/14/2007 |
Q: autECLPS...) to do this. But package (the only I was able to found) com.ibm.eNetwork.ECL contains ...
A: I haven't used this library myself. If the method is missing from the java library (trying looking ...
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| math in computer science | 7/21/2007 |
Q: i would like to know why is math such an important subject in computer science i would like to know ...
A: Computer science is used to solve problems using computers. Computers are not smart, you have to ...
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| Java messenger program | 7/20/2007 |
Q: i am currently constructing a java messenger program that makes use of applets-servlets ...
A: Yea, I don't think that there are much in the way of java IRC servlets, and if there were it would ...
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| Java messenger program | 7/20/2007 |
Q: i am currently constructing a java messenger program that makes use of applets-servlets ...
A: I would just use one of the IRC servers as the back end. There are plenty of IRC java clients (and ...
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| Servlet | 7/18/2007 |
Q: I want the source code to upload a file using http post method using servlet. I want to post my file ...
A: I don't have experience with servlets. If I were doing this with a simple standalone java ...
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| Java doesn't work | 7/12/2007 |
Q: I downloaded the free version of Java, then went to Internet Options and under Advanced checked ...
A: The java console is not necessary to run java, however if the option appears in your browser java is ...
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| java not working!!!! | 6/30/2007 |
Q: ok now my java is not working ... as u can tell.. i have dowloaded several java .. applets .. i ...
A: If you still can't uninstall the previous versions, you will simply have to live with the stale ...
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| java not working!!!! | 6/29/2007 |
Q: ok now my java is not working ... as u can tell.. i have dowloaded several java .. applets .. i ...
A: Seems like you have stale entries in the add remove programs. If you don't want java you can ...
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| Programming with sound input | 6/25/2007 |
Q: I am interested in 'reinventing the wheel' of speech recognition. Would Java be an appropriate tool ...
A: Java has the capabilities to read sound from a microphone, and output sound though a speaker. Java ...
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| Flash Frontend to Java App | 6/25/2007 |
Q: I've written an application in Java, doesn't do much and interaction is limited to entering numbers ...
A: If you use a client server model you can have Java on the back end while flash is on the front end. ...
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| not getting correct output | 6/20/2007 |
Q: i m working on image processing. i have two classes GrayImage and Thresholdf. The problem is once ...
A: This is the expected behavior. You are creating an image with a filter, any changes to the image ...
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| System Date | 6/12/2007 |
Q: I want to write a Java program to capture the system date on everyday. I want to capture the system ...
A: You can use System.currentTimeMillis() to get the current system time (as the number of miliseconds ...
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| JTree with Checkbox, separating node highligth and checkbox tick/untick operation | 6/9/2007 |
Q: I want to make a JTree with checkboxes. The checkbox selection should be independent of the node ...
A: Making a tree with check boxes has been done before and doing a web search will reveal several ...
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| removeAll java program | 6/7/2007 |
Q: Can you assist with a problem I'm trying to solve; I have to write a removeAll java program that ...
A: The length of the array parameter is really not needed since you can simply say: myArray.length to ...
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| Question | 6/6/2007 |
Q: I am trying to make a java code (using TEXTPAD) and having some difficulty. Right now in the program ...
A: When you receive the number the user enters, you get it as a String. So all you have to do is ...
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| GUI Program Assistance | 6/3/2007 |
Q: can you pls help me with a project I'm workig on? I need help writting a GUI program that convert ...
A: You cannot compile on the commandline like that. You first create a file Uppercase.java and save ...
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| GUI Program Assistance | 6/3/2007 |
Q: can you pls help me with a project I'm workig on? I need help writting a GUI program that convert ...
A: You need that in a method. If you want to display it you will also need to output it to the console. ...
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| convert urdu text to unicode | 6/3/2007 |
Q: I could not find a converter, to translate urdu text to unicode. Could you please show me where is ...
A: Unicode is an encoding. Urdu is a language. If the text is encoded in a non-unicode encoding that ...
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| Java | 5/30/2007 |
Q: How can i pass result values from one page to other page when you click on hyperlink and the ...
A: I can't help you with this too much since I am not not familiar with jsp. On a side note, do not ...
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| unicode block in java textbox | 5/29/2007 |
Q: setInitialInputMode("UCB_GREEK");this is a method in java textbox.(1)please tell me what its ...
A: I assume that method is used to provide a hint as to what input locale to use. Not all devices will ...
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| Javac and JDK--Elementary Question | 5/28/2007 |
Q: I just began learning Java, and I am trying to use the "javac" compiler. I have downloaded three ...
A: javac is in the bin folder of the sdk. On windows it is located at: c:\program files\java\<jdk ...
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| some automation | 5/28/2007 |
Q: Can java help me do these things? posting a keyword into the query box of some forum(web-based) ...
A: Java doesn't really support the manipulation of web controls. You could however bypass this by doing ...
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| highscores | 5/23/2007 |
Q: Sir, I am new to java and i want a code for storing five scores usaing files and vector?
A: A vector is just a data structure that works like a resizable array. If you are going to use exactly ...
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| Problem on retrieving Unicode Data | 5/23/2007 |
Q: I have entered data in the following manner in the Database String Encoder = ...
A: Data Type Mismatch means that the value entered in does not match the value type of the column. If ...
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| Replacing \\ with \ | 5/22/2007 |
Q: I want to replace the following string with single slash. String s = ...
A: the single slash doesn't exist outside the java source code. It merely tells java to use the unicode ...
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| Unicode not transformed to Urdu | 5/22/2007 |
Q: Its Tariq Again... :) I have not yet successfully transformed Unicode to Urdu in Swing's JTextArea. ...
A: If you are having problems with using NVARCHAR, you could encode the string into UTF-8 before ...
|
| Unicode not transforming | 5/18/2007 |
Q: I have successfully generated the Unicode of my Local language(Urdu) and saved that in DB. But when ...
A: What do you mean by it shows unicode? Unicode includes Urdu characters. You may want to check that ...
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| print in java | 5/15/2007 |
Q: plese give me a solution to the following Question. How to print a bulk of data automatically in ...
A: You should look at the printing tutorial: ...
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| JFrame and Urdu | 5/14/2007 |
Q: I have a Unicode String. Its a Urdu name (USMAN) String text = "\u0639\u062b\u0645\u0627\u0646"; ...
A: Assuming the database can handle the Unicode string it should work, assuming the font can handle it. ...
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| Urdu Language Display in Swing | 5/14/2007 |
Q: I have developed a Swing application. Application is a Testing application which shows MCQs ...
A: If the database is using a unicode string to store the questions you can easily retrieve them as ...
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| Urdu Language Display in Swing | 5/14/2007 |
Q: I have developed a Swing application. Application is a Testing application which shows MCQs ...
A: I guess I don't understand your problem. You can dynamically change the text in a JLabel by just ...
|
| Question on overriding | 5/13/2007 |
Q: as we all know that the legal path for overriding a method with a different access type: private -> ...
A: When you access the method though a reference to the superclass you have to make sure the method is ...
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| Urdu Language Display in Swing | 5/11/2007 |
Q: I have developed a Swing application. Application is a Testing application which shows MCQs ...
A: This depends on how the application was implemented. Are you sure you want to display English and ...
|
| images in javaswing | 5/8/2007 |
Q: i want to diplay an image in JFRAMES,but i am unable to do it,can u plz help me
A: The easiest way to display an image is to use a label that has no text, and uses an ImageIcon as its ...
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| java--edit the hour in a clock. | 4/23/2007 |
Q: I am working with this program: http://users.erols.com/ziring/java-samp.html#clock ...
A: What you need is a local variable to keep track of the time difference (keep it in the ClockLabel ...
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| java--edit the hour in a clock. | 4/22/2007 |
Q: I am working with this program: http://users.erols.com/ziring/java-samp.html#clock ...
A: Your current clock is a label that mirrors the current system time. What you could do is display an ...
|
| reading multiple numbers from one line | 4/18/2007 |
Q: I intend to paste data (non-int numbers, multiple columns) from excel to my text pane, and have the ...
A: 1: String[] numbers = myString.split("\\t"); for(int i = 0; i < numbers.length; i++) { //add the ...
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| tables | 4/17/2007 |
Q: for example, the lobbys in yahoo games there is a scrollable table with buttons and text and lines ...
A: If you are using swing you can use JScrollPane to accomplish this. E.g. if you had: JFrame frame = ...
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| make java to be application file | 4/15/2007 |
Q: i have a java file with class file..how can i convert all my file to be application file(.exe)?
A: Before you do, you should consider that creating a jar will work just like an exe, in that clicking ...
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| java swing | 4/13/2007 |
Q: I am new to java swing and GUI creation in general; can you tell me how I can "pass" along an event ...
A: The easiest way to accomplish this is to simply have a reference in your login page to the main ...
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| core java | 4/7/2007 |
Q: main method belongs to which package, or are we overriding main method in our class, and what is the ...
A: main method can be in any package, in any named class. Main is a static method, there is no ...
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| Creation of Object | 4/6/2007 |
Q: I m learning core java..and wanna ask u that EXCEPTION is an object..which always make at ...
A: static methods and variables are independent of any object. Static methods cannot call instance ...
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| Package | 4/4/2007 |
Q: .I m a beginner in java..And want to ask u that how to link several user made packages to one ...
A: well if the source files are together or they are compiled in a jar, you can simply import them. ...
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| Creation of Object | 4/4/2007 |
Q: I m learning core java..and wanna ask u that EXCEPTION is an object..which always make at ...
A: There are no compile time exceptions. The ClassNotFoundException (and others) are thrown when you ...
|
| does blue j support generics | 4/3/2007 |
Q: 4 public class EqualityTest { public static < T extends Comparable<T>> isEqualTo(T x, T ...
A: Hrm... the source switch for the compiler probably got set somehow. My bess guess is to check the ...
|
| Java assignment | 3/30/2007 |
Q: I am just writing to ask if you are familliar with arrays and methods. I have an assignment due, and ...
A: you can declare arrays using the [] syntax. E.g. To create an array of 5 elements (all initially set ...
|
| java | 3/28/2007 |
Q: this is geeta. my question is 1. how to run java in linux operating system because i know only on ...
A: 1. You can go to http://java.sun.com for the sdk and the runtime for the platform of your choice. ...
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| problem in xtremepc2 source code | 3/26/2007 |
Q: i've read in one of your posts that you worked with xtremepc 2.0. the link to that page is : ...
A: Well its probably only with one \ not two. Since in java strings you must escape out the \. e.g. ...
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| java help !! | 3/24/2007 |
Q: Assume that there are two machines A and B where A will provide the public key for RSA (i.e. ...
A: The easiest way of doing this is to use the isProbablePrime method in BigInteger. E.g. BigInteger ...
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| file matching | 3/23/2007 |
Q: I created two files, one that contains account number and balance and the other account number and ...
A: NullPointerException is a very common error that arrises when you try and call a method (or access a ...
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| monitoring system | 3/22/2007 |
Q: .i hope u can help me..i am a new user java programming.so lot of thing that i still cant ...
A: Once you got the proxy up and running, you just do a lookup into the data base when a connection to ...
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| Trying to write to text file but it just ends up erased. | 3/8/2007 |
Q: My need is to update a text file by inserting a line of text at a line number determined at run ...
A: The problem is there is no way to insert data into a file. You can append or overwrite, but if you ...
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| JNI & local references passed from native code to JVM | 3/6/2007 |
Q: I'm trying to get clarification on what i've read about local references. I have some native code ...
A: The jvm keeps track of all references, the JVM simply removes all local references when native code ...
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| JAVA RTE switches | 2/28/2007 |
Q: I am running: jre-1_5_0_11- Windows i586-p-ifw-Xmx768M.exe by Sun Microsystems. Inc. version ...
A: You can use 'java -help' to get a list of standard commands. You can use 'java -X' to get a list of ...
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| slidehow | 2/25/2007 |
Q: I've been working on an image viewer/editor for the last couple weeks. Now I want to add a slide ...
A: The problem is that you are trying to do a slide show on the event thread. Anything you do on the ...
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| java applet | 2/23/2007 |
Q: How can i load the information shown by an applet on the browser into a text file??
A: If the text file is located in the same place as the .clas file for the applet (or application) you ...
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| program languages and their use | 2/23/2007 |
Q: i know that among the most popular computer languages there is C++ and java. i would like to know ...
A: The biggest influnence when choosing a programming language for a product, is to determine what ...
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| arraylist | 2/20/2007 |
Q: I need the following code to firstly look at a value that is stored within a combo box, take this ...
A: 1. classes in java are case sensitive. You must use String not string. 2. You cannot reuse variable ...
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| components in swing | 1/7/2007 |
Q: i have a simple question how do you remove a component (such as a button or even a panel) from ...
A: just call remove(component) on the jframe/jpanel to remove a component. If a component is already ...
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| Java compile error package does not exist | 12/29/2006 |
Q: This should be an easy error to fix but I must be doing something stupid. I am using the Java3D ...
A: Chances are the Java3D library does not exist on the other person's computer. All extension ...
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| i really wanan hack runescape.. | 12/24/2006 |
Q: please can you teach me how to hack runescape (i havnt ever hacked a game before..) is it possible ...
A: When I made a program way back in the day, I had 3 years of java experience, and it took me a couple ...
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| Generics in Java 1.5 | 12/17/2006 |
Q: I've tried searching the web for 2 days without answer. I have a ApplicationHelper.java that ...
A: Well the code itself would not case the problem. It is possible that when the jar is created some ...
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| SCJP | 12/8/2006 |
Q: Question No 52 Exhibit: 1. public class test { 2. public static string output = “” 3. 4. public ...
A: 52: If an exception is thrown in a try block and caught in a finally block, the rest of the try ...
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| SCJP | 12/8/2006 |
Q: Exhibit: 1. interface foo { 2. int k = 0; 3. ] 4. 5. public class test implements Foo ( 6. public ...
A: For the first one, the answer is not A. There are a lot of compiler errors. A is the only incorrect ...
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| runescape bot creation | 12/8/2006 |
Q: i was wondering if you could tell me how to create a bot to increase all my stats in Runescape 2
A: Creating a bot requires you are able to implement a program that gets past all the anti cheating ...
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| SCJP | 12/5/2006 |
Q: QUESTION NO: 135 Given: 11. String a = “ABCD”; 12. String b = a.toLowerCase(); 13. b.replace(‘a’, ...
A: The replace method in String does not modify the String, rather it returns a new string with those ...
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| SCJP | 12/5/2006 |
Q: QUESTION NO: 124 Given: 1. public class Test { 2. private static int[] x; 3. public static void ...
A: 124: x is never assigned a value so it is null. Trying to index a null value will result in a ...
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| SCJP | 12/5/2006 |
Q: QUESTION NO: 117 Given: 1. public class X implements Runnable { 2. private int x; 3. private int y; ...
A: B can be elimited since the increment of x and y are in a synchronized block, thus nothing can ...
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| SCJP | 12/4/2006 |
Q: QUESTION NO: 52 Given: 1. class Super { 2. public int getLenght() { return 4; } 3. } 4. 5. public ...
A: The method getLength in Class Sub is overriding its super class method, but has a different return ...
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| SCJP | 12/4/2006 |
Q: QUESTION NO: 70 Given: 1. public class X { 2. public X aMethod() { return this;} 3. } 1. public ...
A: A: Cannot be added since it matches the name and parameters of an existing method, but the return ...
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| SCJP | 12/2/2006 |
Q: QUESTION NO: 107 Which three demonstrate an “is a” relationship? (Choose three) A. public class X { ...
A: The "is a" relationship is the same as the instanceof operator. A. X y = new Y(); //valid B. Shape ...
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| SCJP | 12/2/2006 |
Q: QUESTION NO: 106 Given: 11. try { 12. if ((new Object))(.equals((new Object()))) { 13. ...
A: Line 12 has a few problems. When you create a new object you need to use the constructor syntax, ...
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| SCJP | 12/1/2006 |
Q: QUESTION NO: 31 Given: 1. public class Alpha1 { 2. public static void main( String[] args ) { 3. ...
A: The answer is B, although each number is on a different line. i starts at 0 outside the loop. i is ...
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| SCJP | 12/1/2006 |
Q: QUESTION NO: 22 Which statement is true? A. catch(X x) can catch subclasses of X. B. The Error class ...
A: A: try { //code to try } catch (Exception e) { //exception to catch. } if any subclass of ...
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| SCJP | 12/1/2006 |
Q: QUESTION NO: 1 Given: 1. public class Test { 2. public static void main(String args[]) { 3. class ...
A: line 6 is assigning a new instance of Foo to an Object reference, the cast here is not needed. ...
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| runescape account hacking/cheats | 11/30/2006 |
Q: ok what do you mean by key logger and how would i do this, laso is there any cheats at all for free ...
A: A keylogger is a back door in a victims computer that records keystrokes as they type them. These ...
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| SCJPJAVA | 11/29/2006 |
Q: QUESTION 24 Given: 1. package foo; 2. 3. import java.util.Vector; 4. 5. private class MyVector ...
A: Outer classes cannot be private, they can only be public and "pacakage" (no access modifier). In ...
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| SCJP JAVA | 11/29/2006 |
Q: QUESTION 19 Given: 1. public class Test { 2. public int aMethod() { 3. static int i = 0; 4. i++; 5. ...
A: Line 3 of Test has a static variable in a method which is not allowed. The following 'alternatives' ...
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| SCJPJAVA | 11/29/2006 |
Q: QUESTION 15 Given: 1. class A { 2. protected int method1(int a, int b) { return 0; } 3. } Which two ...
A: C is ok, since the second parameter is not the same type as the second parameter in A's method1. If ...
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| Mandar(JAVA) | 11/28/2006 |
Q: ClassOne.java: 1. package com.abe.pkg1; 2. public class ClassOne { 3. private char var = 'a'; 4. ...
A: There is a compiler error on line 5 and 6 of ClassTest.java. The method getVar() in class ClassOne ...
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| runescape account hacking/cheats | 11/27/2006 |
Q: i was wondering what are the go about on hacking runescape accounts . i know it can be done because ...
A: hacking accounts generally is related to having a keylogger installed on someones system that ...
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| runescape hack | 11/25/2006 |
Q: I read the article you had answered about hacking into runescape and making bots that would run ...
A: Unless you have a good amount of knowledge of java, I'm probably not going to be able to help you ...
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| how to add a hyperlink to a dialog | 11/24/2006 |
Q: I want to add a hyperlink on a JDialog box, which on clicking will open a file. I simply added ...
A: If you want to anything more than basic HTML you should use the JEditorPane class instead of a ...
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| How to get a class in another classloader? | 11/24/2006 |
Q: I know there are 3 classloaders in tomcat server, one is for server application the classpath of ...
A: This depends on how the classloaders are organized. If classloader A is an ancestor of classloader C ...
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| Java Project | 11/23/2006 |
Q: Do you know how to create a class? Yes Do you know how to make a method? Yes, but not sure how it ...
A: Since the issueBook method for each sub class will be different, you can declare it abstract, and ...
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| Java Constuctors | 11/23/2006 |
Q: What are Java Constructors? Please explain with detail and exampes. Also show me some Java programs ...
A: A constructor is the method that is called to create an instance of a class. If you do not provide a ...
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| javaw versus java -jar | 11/17/2006 |
Q: So, I wrote a java application that runs on my own machine by either double-clicking the JAR file ...
A: If you look in the file accoication the jar you should see exactly what is run. Jar files use the ...
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| group by in java | 11/7/2006 |
Q: Is there any "group by" function like SQL group by in java? Thanks, lzzzz
A: Not really, but its not to hard to do in a few lines of code. Although this depends on the data type ...
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| Need Comments plz | 11/6/2006 |
Q: Harper, I am a 1st year student at university and was wondering if you can be of any help. I have ...
A: I'm more of a Java person, but I will do my best here. Note that this code should never be used in ...
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| JTable to XML and XML to JTable | 10/31/2006 |
Q: How do I convert a JTable to a XML file and a XML file to a JTable? I searched a lot on the ...
A: Please see: http://java.sun.com/products/jfc/tsc/articles/persistence4 Depending on the content of ...
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| getting processor id | 10/30/2006 |
Q: sir, I wanted to have a unique aunthentication procedure based on processor id. regards, ...
A: I don't think there is anyway of getting what you want. There are probably some tricks you can pull ...
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| java | 10/24/2006 |
Q: 1.what is the use of tagged interfaces in java? explain me with an eg taking SingleThreadDemo ...
A: 1. Tagged interfaces are used to denote a class or instances of a class specially. Serializable is ...
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| getting processor id | 10/21/2006 |
Q: sir, In Java, is there any OS independent way to get the processor/CPU id. regards, sreekanth.
A: What do you mean by id? You can determine the architecture of the system by using: ...
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| desktop file search | 10/19/2006 |
Q: sir, for traversing through directories, i am using the following code. but its not able to compile ...
A: The code segement is somewhat incomplete. I did not recieve any compiler warnings when I tried to ...
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| desktop file search | 10/16/2006 |
Q: sir, 1. i am using core java. i want to find the path of a particular file in my system. is there ...
A: When java installs it should be in the path for most systems. 1. There is no good way to do file ...
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| Question | 10/4/2006 |
Q: I am a senior in high school and have been asking many people to help me answer a question but I ...
A: Runescape was created by a small set of developers, it would take a very long time for an individual ...
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| Executing a java program from another directory | 10/2/2006 |
Q: Sir, My problem is: I have one java program in the current directory "C:\Current" by name ...
A: First, java.exe does not take a directory structure to start, rather it takes the name of the class. ...
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| asking for tutorials | 10/2/2006 |
Q: im a programmer but of different language,im reading right now about mobile application in Java ...
A: I haven't really done much with mobile devices, but http://java.sun.com/developer/onlineTraining/ is ...
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| jar file | 9/26/2006 |
Q: I am using JCreator to code a simple GUI program. Now, what I'd like to do is to convert the java ...
A: I haven't used JCreater, so I can't help you much. The problem you are running into however is that ...
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| query on interfaces and abstract classes | 9/21/2006 |
Q: i have a small query regarding when to use interface and when to use abstract classes.... i have a ...
A: Interfaces cannot have fields, and do not define constructors, and all methods have the same ...
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| transfering data between swing components | 9/20/2006 |
Q: Artemus, I have a program that has the main container. Inside, it will have 4 panels named panel1, ...
A: If you are not using a layout manager the component can resize itself, after doing so you can ...
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| printing | 9/19/2006 |
Q: How can i print out the output of the data program? And how can create a data file that i could see ...
A: What is "the data program"? If your running an external process you can use the ProcessBuilder ...
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| Executing a java program from another java program with platform independence | 9/18/2006 |
Q: Sir, You have mentioned in the answer of my previous question that for platform independence we need ...
A: If you want to wait until the process is finished you can read from the processes stdout and write ...
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| Regarding Java IDE creation in java | 9/18/2006 |
Q: ------------------------- Followup To Artemus Harper Dear Sir, Thanks a lot for taking concern to ...
A: Syntax highlighting is not easy, but its considered basic by may IDEs. See: Read: ...
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| Regarding Java IDE creation in java | 9/16/2006 |
Q: ------------------------- Followup To Artemus Harper Dear Sir , Thanks for ur reply.I created a ...
A: Basic features for an IDE: Synatx highlighting Goto line number Multiple files open at once. ...
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| Running java program using RunTime.getRunTime().exec() | 9/15/2006 |
Q: Sir, can u tell me how to ececute a java program which is already compiled using another java ...
A: Runtime.exec method does not do shell commands. If you want to execute shell commands use cmd.exe /C ...
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| Regarding Dialogs in java | 9/12/2006 |
Q: ------------------------- Followup To Mr.Artemus Harper Thanks for ur reply.Sir How to get the ...
A: I haven't used swt. Using swt is not trivial. You can download swt from www.eclipse.org/swt/ The ...
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| Create a window in Java with 2 circles ramdomly move in the window | 9/10/2006 |
Q: 1st, I'd like to thank you. 2nd, how can I draw the 2 lines from the top corner to each of the ...
A: In order to draw a line to the corner of a circle you will have to calculate where that is ...
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| Create a window in Java with 2 circles ramdomly move in the window | 9/7/2006 |
Q: I am new with GUI Java. I try to write a program which will create a window (which I did) with 2 ...
A: What you want it to have a timer object that updates the the variables on where the circles and ...
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| application memory space | 8/30/2006 |
Q: I have three questions about application memory management, 1.does an application run within its ...
A: 1. It depends on the OS, but usually yes. 2. Again, depends on the OS, but most desktop OSs handle ...
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| Dictionary | 8/28/2006 |
Q: I saw your explanation about helping creating a dictionary...and I want to ask ...
A: MSWord is a bit complicated, since there is no easy way to get at the format. What you can do is ...
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| applet signed certificate | 8/28/2006 |
Q: i signed my applet and i got six months free certificate,but now my problem is can i get certificate ...
A: No, you have to resign and redeploy your applet every six months. This is designed as a security ...
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| getting images from remote machine using applets | 8/23/2006 |
Q: iam woring in larsen and toubro mysore,india. iam new to core java. in my project i compleated ...
A: 1. You can communicate with the server the applet is located on. For other computers you will have ...
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| What is Its Purpose of Java? | 8/22/2006 |
Q: What purpose does Java, Java Script, etc. really serve? The latest Java, or Script downloaded into ...
A: First: Java and java script are two different enties, you can have one without the other. Java is ...
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| log information and log level | 8/11/2006 |
Q: A Logger such as Log4j has several logging levels -- debug, info, warn, error, fatal, I wonder what ...
A: Its mostly up to you. The idea is that someone may only want to look at warn logs and higher to see ...
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| Buttons are not shown when drawImage() method is used | 8/1/2006 |
Q: Sir I replaced paint() method with paintComponent() but the result is same as before.Sir ...
A: When you say getImage the image retured is not always fully loaded, trying to paint the image before ...
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| Buttons are not shown when drawImage() method is used | 7/31/2006 |
Q: Sir In my swing window, I am using two buttons and an image. I am using fillRect() method to ...
A: When you are using swing you should not use the paint method. Since that method also paints the ...
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| project Titels | 7/28/2006 |
Q: Respected Sir, i m doing Bachelor of IT Engg. from RSCOE (Pune university) and i m in final ...
A: Java has a rather large scope on what it can do, focusing on what you studied is best. Java is good ...
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| makin dictionary in java | 7/24/2006 |
Q: Followup To Question - Well i want to make an English dictionary in java, but i couldnt get any ...
A: If you just want a dictionary for spell checking you can use a HashSet instead. E.g. ...
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| makin dictionary in java | 7/21/2006 |
Q: Well i want to make an English dictionary in java, but i couldnt get any idea dat how i will do ...
A: As I said this is why you would use a HashMap. E.g. import java.util.*; HashMap<String,String> ...
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| Java | 7/21/2006 |
Q: I am having a String object s= "7/21/06"; i want ot change the string object to date object. ...
A: You should use the DateFormat to read in and write out dates. E.g. DateFormat myDateFormat = new ...
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| makin dictionary in java | 7/19/2006 |
Q: Well i want to make an English dictionary in java, but i couldnt get any idea dat how i will do ...
A: You can use a HashMap to store all the words to their definations. If the Dictionary is large it ...
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| java | 7/19/2006 |
Q: what is static?why we use static?
A: static means that the field/method is independent of instances of the class its declared in. All of ...
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| Simple java applet problem | 7/17/2006 |
Q: Okay, First off, I'm an experienced programmer, looking to get into coding applets. I have coded ...
A: I believe that gcj generates executable code, not code that is run in the java vm. This error means ...
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| Synchronization | 7/17/2006 |
Q: What synchronization constructs does java provide ? How do they work?
A: When you synchronize on an object your thread gains exclusive use of that object until ...
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| How can I know weather a printer is on/off? | 7/11/2006 |
Q: I understand, So what does PrinterStateReasons and printerState objects should provide if not a ...
A: The PrinterStateReason is any possible known states the printer is in. It might be none of these, ...
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| java -cp resourcedir;lib.jar -jar main.jar | 7/10/2006 |
Q: I encounter a problem with "java -cp resourcedir;lib.jar -jar main.jar", is java looking for ...
A: Although I have not tried this myself. It is possible classes loaded via the -jar flag will only ...
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| Help on Static Inner Class | 7/10/2006 |
Q: What is the difference between the static class and static inner class in Java?
A: static classes have to inner classes. Differences between static classes and non-static classes: ...
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| How can I know weather a printer is on/off? | 7/9/2006 |
Q: The PrintServiceLookup.lookupPrintServices method returns a list of all the installed printers. of ...
A: Its not really possible to determine if the printer is on or off, the printer might be a network ...
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| JAVA | 7/8/2006 |
Q: I created a form with a button in java. How can I open an application e.g. (Microsoft calculator) ...
A: Warning: Executing external applications may fail on different operating systems. ...
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| Calendar in Java | 7/8/2006 |
Q: I want to write a code in java that constructs a gegorian calendar, where the months are represented ...
A: Why write code for a gregorian calendar when one already exists (java.util.GregorianCalendar)? See ...
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| Where is Iterator Interface Implemented? | 7/6/2006 |
Q: I am using the java.util.HashSet class, which has an Iterator method that returns an Iterator. I ...
A: Each class in java.util implements its own iterator. These iterators are private classes, and ...
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| Drag and Drop audio and video files from windows explorer to Applet? | 6/24/2006 |
Q: ...... Can u help me out to how to Drag and Drop audio and video files from windows explorer to ...
A: In order to allow drag and drop to do anything usefull with Applets it must be trusted by the user. ...
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| Swings Applets | 6/23/2006 |
Q: sir i have problem with swing applet.when i call repaint() in swings it will not clear back ...
A: When repaint it called, then at some latter time (generally within .5 seconds) the paint rotunie is ...
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| FTP | 6/22/2006 |
Q: i have some source code to make a FTP. but i'm not sure how to make my FTP can block all data ...
A: The term copyright material is rather undefined. Copyrighted by who? Do you mean registered by US ...
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| get the user names from Active Directory domain | 6/20/2006 |
Q: Currently i am working on weblogic portal regarding the SSO(single Sign on).I just wanted to know ...
A: You can use System.getenv(String) method to get various enviromental variables, some of which ...
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| JTextArea and caret postion | 6/18/2006 |
Q: Sir, I was making one application which has 2 JTextArea's and 1 button. When i enter some text in ...
A: The problem is that when you clear the text the enter key is still being processed by the text area, ...
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| Regarding Browser plugin in JAVA | 6/18/2006 |
Q: "Hi, I want to develop a plugin for browser (for IE,Mozilla,safari...). Can i do it in java? If yes ...
A: Each browser uses different technonlogy for plugins, so some customization for each browser would be ...
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| JTextPane and mouse disabling | 6/14/2006 |
Q: Sir, Can u tell me how to disable mouse right click and left click buttons when put on a JTextPane. ...
A: If you subclass the JTextPane you can override the processMouseEvent(MouseEvent) method, and simply ...
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| What is the machanism of super() | 6/13/2006 |
Q: What is the machanism of super() (algorithim or code used in implementing in Super()). How it dicide ...
A: When you use super each class above yours is checked to see if it has that method or constructor ...
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| Java Virtual Machine Launcher | 6/3/2006 |
Q: When I log in I get a box appear on my desktop which says Java Virtual Machine Launcher Could not ...
A: There is something set to startup when you log in that is a .jar file. The jar file for some reason ...
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| Java Question | 5/31/2006 |
Q: I am preparing for my java final exam and i came across 2 questions: a) Rank the following ...
A: a) Determining what grows the fastest depends on what is going to produce the biggest number for a ...
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| Bitwise operators in Java | 5/20/2006 |
Q: Good morining sir, Could please tell me about Bitwise Operators in Java, what is the use of those ...
A: > Could please tell me about Bitwise Operators in Java The bitwise operators: << shift left >> shift ...
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| Swings and date, time | 5/13/2006 |
Q: Can u please tell me how to change time after every 1 minute, which displayed on a label. That is, i ...
A: You can use the Timer class (use the one in javax.swing not java.util). E.g. import ...
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| Swings and desktop | 5/13/2006 |
Q: Can u solve my following problem: I have to simulate the desktop environment of windows using Java. ...
A: You can do this, the amount of work required depends on how funcational you want it to look. E.g. A ...
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| manipulate the super class attribute in its sub classes? | 5/12/2006 |
Q: I have a abstract super class and its two sub classes, the super class have a protected attribute, ...
A: You cannot manipulate the access level of fields. You can manipulate the access level of methods so ...
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| Swings and winamp application opening | 5/12/2006 |
Q: Can u please tell how to open Winamp, if we click a button in the form developed. Means, i developed ...
A: The main problem is determine where winamp is located. If you know (or assume some default location) ...
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| related to tabbedpane in java | 5/12/2006 |
Q: how we use the textfields,labels and buttons in the tabbedpane....please explain the coding in java ...
A: What you do is create a JPanel for each tab you want. In the JPanel put your JTextFields and JLabels ...
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| How to hack into runescape? | 5/11/2006 |
Q: Im wanting to know how to hack into www.runescape.com i dont know how long ago you hacked into it ...
A: I don't think anyone has actually hacked into runescape. Bots have been created, exploits have been ...
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| JVMPI & JNI | 5/10/2006 |
Q: I'm using the attached piece of code as reference for a class project, but I have never seen the ...
A: 1. If there is no access modifier then the method/field/class has package access. Every class in the ...
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| Images in Game Applets - Pong | 5/8/2006 |
Q: Harper, I have been working on this Java version of pong for a few weeks now. As far as the game ...
A: You could try buffering your image. Keep an Image field around as a buffer, create it using ...
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| Referencing Files | 5/4/2006 |
Q: Heyas, Yeah I did wonder if really this was meant to be in the registry or, at least, the ...
A: I've been using Eclipse for some time, and the version I am using supports java 1.5 (still a few ...
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| Referencing Files | 5/2/2006 |
Q: Hey again, That approach worked perfectly for reading files, but as the preference file stores the ...
A: Its rather rare to actually write to a jar file. If the file was online doing this would be simply ...
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| Batch File in Java | 5/2/2006 |
Q: Hi i have one java file and i hav to run batch file for running cd command and then java commmand so ...
A: Instead of changing the directory and running java you could do: java -classpath ...
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| seach string in web browser | 4/30/2006 |
Q: I am trying to make the following program: Program checks the html web page seachs for the specific ...
A: What you would do is open a stream to the URL, wrap a Reader around the InputStream, and dump it to ...
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| Referencing Files | 4/29/2006 |
Q: Heyas, I've got a program that stores user variables in a file called preferences.ini at the root ...
A: If you jar, its rather difficult to actually write to it, so if your fine in just reading you can: ...
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| displaying the content of HTML File | 4/23/2006 |
Q: I am doing my project in Java Swing.I am having a program to get the input from the user as URL in a ...
A: You are probably getting an EOFException because there is an empty or malformed file at C:\Documents ...
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| integration of modules | 4/22/2006 |
Q: sir, I have sent the following question before some day and I tried according to your answer.But ...
A: So the labels in the popup menu of f1, f2, and f3 are not showing when you call their main method, ...
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| displaying a web page | 4/22/2006 |
Q: We are students of an engineering college.We are doing our project in Java Swing.Our problem is need ...
A: You may need to configure your firewall to allow java access to the internet. The new version of ...
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| Viewable windows | 4/21/2006 |
Q: Heyas, I've written a card game with a GUI, and just implemented options to change the resolution ...
A: Either: A: The frame needs to be invalidated, use frame.invalidate(). B: All component changes ...
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| Building a website | 4/20/2006 |
Q: Even i could not complete them well, but i am fine with that assignment. I really appreciate that. ...
A: I do not recall what tools you are using for your web site. If you mean what parts of a site should ...
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| Java swing | 4/18/2006 |
Q: I am a student at a high school in Belgium, I have to make a multiplayer-over-network game on ...
A: There are several drawImage methods. The one you probably want to use is: drawImage(Image image,int ...
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| Java swing | 4/16/2006 |
Q: I am a student at a high school in Belgium, I have to make a multiplayer-over-network game on ...
A: 1. The getImage() method gives back an Image not a BufferedImage. 2. Directly refering a file on ...
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| sir,
I have three java files... | 4/14/2006 |
Q: sir, I have three java files f1.java,f2.java and f3.java.one for detecting remote os.secnd one for ...
A: If f1.java has a main method you can call it from f4. E.g. public void actionPerformed(ActionEvent ...
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| Array | 4/10/2006 |
Q: Is it possible to create an array which will store any type of data, such as integer, float, or ...
A: You can create an array of Object which will store any non-primative. For primatives you can use ...
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| Java | 4/9/2006 |
Q: When I go into a card site,it says my computer doesn't support java. How do I download java so I ...
A: You can download the newest version of Java from java.sun.com. When you run a java applet from the ...
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| Thumb Impression and Photo Scan using java | 4/4/2006 |
Q: In my project i need to take thumb impression and photo scan using java application , i came to know ...
A: This depends on what format the thumb impressions and photo scans are using. You can use JNI to ...
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| Integrating two java applications | 4/4/2006 |
Q: I was wondering... what would be an efficient way of integrating two Java applications written by ...
A: > I understand that RunProcess has an exec() method that allows a user to do this. But what are the ...
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| Pannels of images, or what? Thanks | 3/29/2006 |
Q: Good morning/Afternoon/Evening name is Tim Dunning. I'm trying to create a message board using java ...
A: I would swap images. Spefically I would create a JLabel containing that has no text and an icon of ...
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| Pannels of images, or what? Thanks | 3/28/2006 |
Q: Good morning/Afternoon/Evening name is Tim Dunning. I'm trying to create a message board using java ...
A: This somewhat depends on if you are displaying each panel in its own frame or in one big frame (or ...
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| How to arrange the Layout? | 3/28/2006 |
Q: I try to learn from the link that you provided me, but i still cannot get my layout done as what i ...
A: If you have to you can simply not use a layout and put the components in the location with the size ...
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| Converting pixels into cm | 3/27/2006 |
Q: The code below is in regards to pixels, how would I convert the pixels into Centimetres? ...
A: assuming you are using the jgoodies API... you can convert Centimeters into pixels, so if you want ...
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| How to arrange the Layout? | 3/26/2006 |
Q: I am a Java beginner and now i need to create a ChattingRoom application for my assignment. I try to ...
A: I would look at the tutorial for layout managers: ...
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| Rectangles and Ovals | 3/25/2006 |
Q: i have created this code, i would like random amounts of rectangles to appear between 0 and 3 and ...
A: well you are drawing several rectangles in the corner in your loop. You probably want them in random ...
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| I would like a random shape size to appear | 3/25/2006 |
Q: I would like random number of rectangles to appear between 0-2 and also random size each time of ...
A: You can use the Random class for that... e.g. import java.util.Random; public class RandNumbers { ...
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| Listening For Window Size in Java | 3/23/2006 |
Q: I am using Java 4 to create a drawing. My drawing has to be abble to resize if the window is ...
A: You don't want a WindowListener, rather you want a ComponentListener. You can use getWith and ...
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| Backtracking | 3/22/2006 |
Q: Most humbly, it si requested that i am developing an URDU(national language of Pakistan) Parser, for ...
A: I'm not entirly sure what you want to do, but you might want to see if using javacc will do you any ...
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| UDP based file transfer | 3/20/2006 |
Q: I am doing my academic project in this area. I want to transfer all filetypes of files using udp.I ...
A: Well to read and write files you can use a FileInputStream and a FileOutputStream. But for transfer ...
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| Disable Tristate check box node in a Jtree | 3/17/2006 |
Q: I am using Tristae check boxes as nodes of a JTree. I wantto disable a few nodes. But it is not ...
A: A shared component is generally used to render each item in the JTree. If you disable one node, you ...
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| java.io | 3/15/2006 |
Q: Basically, i have a script to copy a complete file and produce an output file containing an exact ...
A: Well you just need to change your while loop a bit... CopyFile: while ((c = in.read()) != -1) { ...
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| on multiple jvm's | 3/14/2006 |
Q: what happens if we install multiple JVM's in a single system
A: You have multiple JVM's on your system then. What happends depends on what you are doing. Generally ...
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| Cpu | 3/13/2006 |
Q: sir sorry for further bothering u..actually am not really clear with the java code for cpu ...
A: If you download the commandline process viewer from ...
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| GUI Pauses | 3/11/2006 |
Q: Heyas, I'm making a graphical card game where one human player plays against 3 computer opponents. ...
A: You do want to create another thread for this. But you may need to repaint after the thread is ...
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| Adding a program to batch file | 3/11/2006 |
Q: Another question to ask. I tried adding another program into the folder of a program that executes ...
A: Its only copying the Service.class and the Server_Stub.class to the client directory. I would ...
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| Cpu | 3/11/2006 |
Q: Sir, I used the following code (Obtained from all experts.com) to calculate CPU Utilization for a ...
A: This above code will only guess at the CPU cycles, in most cases it will not work. If you can find a ...
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| Java | 3/8/2006 |
Q: Is there any way to make a java program runs whenever the computer is turned on? Thanks
A: This very much depends on the operating system of the computer. You could put the java program in ...
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| JAVA | 3/8/2006 |
Q: i created a simple window panele and added some buttons and a textbox. my question is how can i ...
A: I would recomend the replaceSelection(String) method, which performs the same function as if the ...
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| java.awt | 3/7/2006 |
Q: I am trying to do a program, that when the mouse points to the task bar(depending on its color) to ...
A: your problem is your import statements. none of the package names are upper case. Color is a class ...
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| java swing | 3/4/2006 |
Q: i am doing project on java awing. i have to display an image on the JFrame object. on the image, the ...
A: Example: /* * JZoom.java * * Created on March 5, 2006, 2:06 PM */ import javax.swing.*; import ...
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| Prime numbers | 3/1/2006 |
Q: I have been trying to find the suitable source code to find the prime numbers, I was able to get ...
A: Your program does not test if a number is prime, rather it tests to see if the number is a multiple ...
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| barcode ttf install | 2/23/2006 |
Q: Running AIX 5.2. Have Java14 installed. We have a java app that needs to print out barcode. We ...
A: I would recomend just reading in the font at runtime, you can use the Font.createFont method for ...
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| write thread on the button | 2/22/2006 |
Q: i have a button, already made in swing can u tell me how to write the thread on that button.
A: I assume you mean execute a thread when the button is pressed. For the button you either have an ...
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| Java/Email Conflict? | 2/19/2006 |
Q: I have a problem with my Dell Inspiron 600m Laptop finding a conflict with Java. For some odd ...
A: Chances are you had an older version of java installed on the system, when you installed the newer ...
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| dynamic array/ array list of arraylists | 2/10/2006 |
Q: well i'm new to java. i need to read stuff from a file and store in some data structure. say i have ...
A: If your using java 1.5 you can use generics... e.g. ArrayList<ArrayList<String>> myList = new ...
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| Why isn't this generic class declaration working? | 2/7/2006 |
Q: I have, essentially, the following class declarations: class Foo { } class Bar<F extends Foo> { } ...
A: F is not defined, all new types have to appear in the template list. A "correct" way of doing this ...
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| java | 2/6/2006 |
Q: my question is what circumstances would you use abstract classes and interface plz answer me with ...
A: You use abstract methods and interfaces when you want to declare a functionality without actually ...
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| Servlet Code - JSP form submit | 1/26/2006 |
Q: Need Help: Posting data to a servlet from a jsp form? hi experts, I'm trying to find logic and ...
A: You would need a Map (Hashtable or HashMap) with keys of line_x values, and values of Lists ...
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| Table with expanding row | 1/25/2006 |
Q: Actually, the display model is a list of Results. This list is displayed in a JTable. Let's ...
A: Well you can't really use a JTreeTable anyways since you want one row to expand across multiple ...
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| Strinbg to IP address | 1/25/2006 |
Q: I encountered problem with the following statements. CommandParser cp = new ...
A: import java.net.*; ... InetAddress address = InetAddress.getByName(client_ip); byte[] dot_address = ...
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| Table with expanding row | 1/24/2006 |
Q: I want to display search results in a table. The feature I am puzzled about is the ability to show ...
A: It sounds like the first column in the table is not connected to the other columns (if that is when ...
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| JNI | 1/23/2006 |
Q: I am trying to access a data member of a class I defined in java through JNI, for example: public ...
A: Just perform a cast on jobject to jobjectArray. All of the JNI classes that represent java objects ...
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| java book or website | 1/21/2006 |
Q: i am goinn to do project in grid computing.we choose java as aprogramming language. i am a beginner ...
A: To learn the basics on java, start at java.sun.com, they include a lot of basic tutorials. The area ...
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| Java not working in one of my brousers | 1/19/2006 |
Q: I have IE and Netscape that I use. The reason I loaded Netscape is that my IE would not open any ...
A: Java does have a plugin for IE. One thing you could try is to go into the java control panel, and ...
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| string | 1/18/2006 |
Q: I am attempting to build program in which a program would prompt the user to enter the name of a ...
A: If you want to send and recieve text you should use a Writer. e.g. BufferedWriter toRecomtepc = new ...
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| Comments needed for Code | 1/13/2006 |
Q: Can you please help me with commenting on this code. I got the code working but need to comment the ...
A: /* * We need stdafx.h in order to do user input/output. */ #include "stdafx.h" /* * Entry point for ...
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| paint image | 1/11/2006 |
Q: Followup To Question - ------------------------- Hi!Thanks for answering my previous question..I ...
A: For whatever component your background is in (e.g. a JDesktopPane) you need to subclass the ...
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| Java Problem | 1/9/2006 |
Q: im doing an aplete for a company im working for who are working on an ecological study on newt ...
A: This depends on the component you are using. Most text componenets you can use the getText() method ...
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| Java | 1/7/2006 |
Q: What is the difference between checked exception and unchecked Exception. ...
A: If a checked exception is thrown, or you call a method that declares that a checked exception may be ...
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| paint image | 1/7/2006 |
Q: .I wud like to ask about another thing..will u please give me some codes on dumping a database.I'm ...
A: There are shell commands to dump and restore a database. If you want to do it just using sql then I ...
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| Java | 12/25/2005 |
Q: I run your example and it did work very fine thank you. As you know it only search for the queens ...
A: Well instead of replacing x and y with 0 and 0, instead get an x and y from the user (you can ask ...
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| Java | 12/24/2005 |
Q: I cam up with a very long solution which is about checking all 8 directions to see if there is ...
A: No, what I ment was to use a for loop to check each direction, not each space... e.g. ...
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| Resource-friendly timer | 12/23/2005 |
Q: Heyas, I'm considering making a very simple program which will run in the background all the time, ...
A: You can use the java.util.Timer to schedule an event to occur at a speficied time (the ...
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| Java | 12/23/2005 |
Q: I'm a beginner in java and im building an 8 queen chess puzzle using java text console no graphics. ...
A: If you want to disallow the user from putting a queen in a position that would "attack" another ...
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| java project | 12/22/2005 |
Q: please i am about to write my final project in java programming before i graduate please can you ...
A: What you pick mainly depends on your experence. For example: Build a gui for sorting and keeping ...
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| component generated events | 12/22/2005 |
Q: i came across this question in a multiple choice past exam paper whilst revising and am not sure of ...
A: 1. This doesn't make any sence at all. 2. This is generally how it is done. 3. This is wrong. 4. ...
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| java | 12/20/2005 |
Q: Iv got a second question. In my main menu are three options as you know from the previous1.Display ...
A: When printing out your matrix the line that determins what mark to use: String ...
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| java | 12/18/2005 |
Q: im a beginner in java and i found ur answer a bit difficult 2 understand could u pleas show me some ...
A: Ok here is a solution. It assumes you are using java 1.5. So if you get a compiler error you are ...
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| java event conflict | 12/18/2005 |
Q: I have made a simple "scribble paint" program in Java in which you drag your mouse over a Frame to ...
A: The problem is you are combining java 1.0 functionality with java 1.2 functionality. the mouseDown ...
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| java | 12/17/2005 |
Q: I made a simple choice program that displays arrays using java text console no visuals in blueJ ...
A: First: You mean adding a value to an array, not adding an array. In order to add values we first ...
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| Command | 12/14/2005 |
Q: It is me again. I found a piece of code from the Internet one of whose functions is enabling the ...
A: I would try printing out the exact command that you are using in exec. You could pipe out the output ...
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| Core Java | 12/11/2005 |
Q: Can We declare a constructor as protected,public or Private. If no then will it lead to ...
A: Yes, you can give any access modifier to a constructor (including none). Also note that constructors ...
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| How to a private method outside a class | 12/6/2005 |
Q: actually what my question is i want to test a private method outside that class in JUnit. for ex: i ...
A: You would either need to somehow tunnel the method to make it accessible, or use reflection. ...
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| paint image | 12/4/2005 |
Q: ------------------------- Hi!Thanks for answering my previous question..Just a follow-up,does the ...
A: Yes, if you use JDesktopPane instead of JPanel you will paint the background of the desktop pane. ...
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| paint image | 11/30/2005 |
Q: ------------------------- Hi! Please give me some sample code of yours on how to paint a background ...
A: If you want a custom background for a JFrame just set a JPanel with the custom background as the ...
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| java gui | 11/29/2005 |
Q: currently the user plays the game in a terminal window and game events are printed as ...
A: Well you probably want to use a BoarderLayout for the Frame. Putting the Text component you want to ...
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| Java | 11/28/2005 |
Q: There are couple of questions which i would like to ask. 1. I downloaded a piece of code from the ...
A: 1. since the lock is released just after it is created, you wouldn't see anything happen. 2. It ...
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| Java | 11/18/2005 |
Q: I encountered some problems with some of the sample codes that i downloaded from the Internet and ...
A: 1. Well from the error message, when you run the application it doesn't have access to the desktop. ...
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| counting character in a file | 11/11/2005 |
Q: I need some help in counting the occurences of characters in a file. I got the code to open the file ...
A: you can keep them in an int[], where the index into the array is the count of that letter. E.g. ...
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| Java Script Pop | 11/9/2005 |
Q: I understand they are different - I have have checked my browser settings and they appear correct. ...
A: Its hard to say what the problem is, but as I mentioned, java and javascript and different things. ...
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| closing/ending JFrame applications | 10/27/2005 |
Q: my question is simple and straightforward i have seen two methods for closing/ending JFrames, those ...
A: For the most part if you use dispose, the application may continue to run if there is other Frames ...
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| Jar Files | 10/27/2005 |
Q: Mr. Harper, I am a high school student learning Java, and I have a good feel for object-oriented ...
A: First by "opening" the archive you are actually asking java to launch the application in side. If ...
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| items | 10/25/2005 |
Q: i want rooms to contain an item. i currently have a class called item looks like this. import ...
A: It seems rooms have items, you probably just need to add something like getItemString method to ...
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| Developer's Productivity | 10/25/2005 |
Q: I am a dotnet developer, I was working in a good company but the only problem there was the ...
A: This is something that comes with experence. If the job is expecting you to complete a task that ...
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| Compile java program from the console | 10/25/2005 |
Q: I have done just what you said but now when i run command prompt and type the command ipconfig to ...
A: the path enviromental variable is mearly a semicolon seprated list of paths to look for applications ...
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| splash screen | 10/20/2005 |
Q: How do I use a layout manager and gridbag layout to add a splash screen to a program, that displays ...
A: I don't see what a layout manager has to do with a splash screen. To show a splash screen just ...
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| java swing | 10/19/2005 |
Q: am a java swing developer and one of many maniacs in java all around the world am crazy about java ...
A: From my experence when dealing with a small database both java and .NET are about equal in ...
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| Since ++ has higher precedence than =, why does the following code print 1 ? | 10/18/2005 |
Q: Since ++ has higher precedence than =, why does the following code print 1 ? ---------------------- ...
A: The reason is that you are using the post increment as opposed to the pre increment. The post ...
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| Compile java program from the console | 10/17/2005 |
Q: I am using Window Xp. There is a java program that needs to be compiled and run from the console but ...
A: Assuming that you have installed the SDK, you would: right-click on My Computer and select ...
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| FIFO | 10/11/2005 |
Q: I am writing a program that enforces the FIFO rule. I am planning to use the Queue class with an ...
A: Queue (java.util.Queue) is an interface that defines simple operations for a Queue. If you want to ...
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| Jtree | 10/8/2005 |
Q: I have Three questions 1. as alaways, an applet shows Applet droped down menu on top left corner to ...
A: 1. I do not know what you are talking about 2. Not very easily, but messing with the graphics can ...
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| Transfering an ActionListener variable's values from a Panel to a class and back again | 10/8/2005 |
Q: I am currently working on a project which requires me to translate text submitted by a user via a ...
A: Well assuming that the Frame class has access to the translator and the JPanel (which would have a ...
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| random from a set of character | 10/6/2005 |
Q: Is there another way to do this without using the array? ThanksHello, I am just wondering how you ...
A: Well you could use a String (which is a char[] underneath) e.g. String chars = "+-/*"; int r = ...
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| random from a set of character | 10/5/2005 |
Q: I am just wondering how you would generate a random character from a set of characters. For example, ...
A: First you would need a random number generator: import java.util.Random; ... Random random = new ...
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| jframes and show()/setvisible(true) methods | 9/27/2005 |
Q: my question is simple, but i was unable to find an answer in my java books what is the difference ...
A: the setVisible method replaces the hide and show methods. The old method names are still there so ...
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| DateTime Convertion | 9/27/2005 |
Q: Good day. From the following is my question, please kindly take a look to help. String ...
A: Most of this can be performed in the DateFormat class and the Date class. See the parse and format ...
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| Java Palindrome Program | 9/26/2005 |
Q: I have a Palindrome program, but it won't compile without errors, can you look at the program? // ...
A: The method looks fine... Perhaps you just need to wrap it in a class to have it function correctly. ...
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| gui design | 9/24/2005 |
Q: iam just wondering about a layout, iam using grid layout and border layout to show my GUI, but when ...
A: You can set the maximum size of the components using the setMaximumSize method, but I am not sure ...
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| toString() | 9/23/2005 |
Q: I am writing a program, displaying this matrix 1 2 3 4 | 10 1 2 3 4 | 10 1 2 3 4 | 10 - - - - - - 3 ...
A: The code in your toString method will simply return the output instead of using System.out.println, ...
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| Java Beginner Program | 9/22/2005 |
Q: i am a beginner at java and I am taking an AP computer course this year. My teacher gave us an ...
A: This is too general for me tog correctly answer. The program requirments are too vague, also I do ...
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| jtogglebutton and actions | 9/21/2005 |
Q: I have an action assigned to a jtogglebutton, but also to an inputmap key binding. The problem is ...
A: The problem is that the action reacts to the selection or deselection of the toggle button, it does ...
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| Add fraction | 9/20/2005 |
Q: I am new to Java 2 and I wonder if you can help me out or point me to a tutorial on any web sites ...
A: Well you would do it the same way you would in math: public Fraction add(Fractaion f) { int gcd ...
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| left alignment grid layout | 9/19/2005 |
Q: .. Just to followup - I'm not using the gridbag layout, just the grid layout, which is where I'm ...
A: you can use: label.setHorizontalTextPosition(SwingConstants.LEFT) to tell the label to show its text ...
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| java question | 9/16/2005 |
Q: i got so many compile errors. the code is not working. will you please remove the errors. regardsi ...
A: I meant this to be an example, not somthing that was fully functional. Also there are not very many ...
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| BorderLayout | 9/15/2005 |
Q: i have a problem that i haven't found a solution yet. It's a part of my project i've been doing in, ...
A: The border layout does exactly what is says it does, don't change that. Instead you can add a JPanel ...
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| concatenation in Textfield | 9/15/2005 |
Q: I have designed a scientific calculator in java with one text field. When i enter 2nd digit in the ...
A: This is probably a design of the calculator. You cannot for instance just set the text. Since you ...
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| Random number | 9/14/2005 |
Q: Now i am not sure I understand "Random random = new Random(357);" Could you elaborate on that. When ...
A: If you just want a "random" number then just use the no argument constructor. Using new Random(357) ...
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| Random number | 9/14/2005 |
Q: I am new to Java and what I try to accomplish is to have my program create a random number between 1 ...
A: The first place I would look is the java API: http://java.sun.com/j2se/1.5.0/docs/api/index.html Oh ...
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| java | 9/10/2005 |
Q: I am so stumped! I am a student and we were given this assignment to finish. it is a program that ...
A: You need a for loop over the word, getting each character and checking if it is a vowl. When you ...
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| java programming | 9/10/2005 |
Q: I am learning java programming and I have been stuck on this program for days! Could you please tell ...
A: Your regDate in SmallBoat class is never initilized, if you want to have the regDate be the time ...
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| java and java swing | 9/9/2005 |
Q: if i create a page with password and login and Ok Button. how can i go to next page if i click Ok ...
A: I have given you code, you just need to assemble it. Also "next page" does not mean anything in ...
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| Java Swings | 9/8/2005 |
Q: ------------------------- Question - Hi harper, In swings if i click a button called submit ...
A: This depends on wether you have the pages in a JPanel or a JFrame. If you have them in a JPanel, ...
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| Java and Sound Editing | 9/7/2005 |
Q: I want to make a program which take humann voice or any other sound as input and changes its ...
A: I haven't delt with java sound much. I know that you can record any play back sound on a mic, I ...
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| GUI wrappers | 9/6/2005 |
Q: I was wondering if you had any resources or any tips on how to design and create gui wrappers for ...
A: I'm not sure what you mean by "wrappers for unix functions". Do you mean creating buttons that have ...
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| Java Swings | 9/3/2005 |
Q: In swings if i click a button called submit then it should take me to next page. How do i do this ...
A: I have no idea what it means to "take you to the next page" but if you have a button you can attach ...
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| record the time | 9/2/2005 |
Q: I am trying to write a program where I can time how long I type the sentence. For example, if I type ...
A: The simplest way of doing this is to compare the time from when they started to when they ended. You ...
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| java (arrays) | 9/2/2005 |
Q: i have a computer science problem that i'm not being able to solve. i have a test and i'm doing ...
A: If this was not a test, then I would just use the sort method in Arrays: int[] array = ...; ...
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| problems with desktoppane and internal frames | 8/31/2005 |
Q: I have 6 classes which are different GUI windows. Now what Iwant to do is create a desktop and add ...
A: For the most part you can treat a JInternalPane as if it were a Window (or Frame or Dialog). For ...
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| Hacking | 8/27/2005 |
Q: Thats is the exact game i want to hack! Could you tell me how? And when you hacked it what did you ...
A: The first thing you have to relise is the only hacking that really can be done is client hacking. ...
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| Web Application Development | 8/11/2005 |
Q: My question is: I have a web site and I would like to add a link to it, so by pressing on it, a ...
A: You could write an active x web application which should be easy to port from a standalone c++ ...
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| java swing | 8/9/2005 |
Q: how to insert values of a text box in a database?
A: Well first you want to get the text e.g. String text = textBox.getText(); String text2 = ...; Then ...
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| cursor | 8/9/2005 |
Q: In Some portion of my java applet i want cursor to be invisible and disable. How Is it possible in ...
A: Best shown by example: import java.awt.image.*; import javax.swing.*; import java.awt.*; public ...
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| copy java data to C structure | 8/2/2005 |
Q: i m facing a problem that i have to copy java structure to C structure and C structure back to Java. ...
A: Well lets first look at possible incompadibilities: 1. char[] in C is ASCII while java's String is ...
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| swing and other java stuff | 8/1/2005 |
Q: i have the following questions i´ve been trying to answer on my own, but was unable to do so. these ...
A: 1. The code for creating your applet is roughly: public void run() { YourApplet applet = new ...
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| Java Link | 7/29/2005 |
Q: I would like to create a button in my java program, such that a pdf-document will open in acrobat ...
A: Runtime.getRuntime().exec("cmd start /c "+file); This is the simplest solution. It also will only ...
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| Regarding a pure java application | 7/28/2005 |
Q: I have a java application. My current question is in particular about two different classes. One is ...
A: Compare what you have to JFileChooser. Since that is using a model dialog the setVisible(true) ...
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| Chat system in java and php | 7/26/2005 |
Q: . I am doing my last year in Bsc(Hons)Software Engineering. For my final year project, i'm ...
A: Since your using php I assume you will be using a server that uses PHP, and the client will be java. ...
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| Executing with java vs javaw | 7/25/2005 |
Q: Platform: j2sdk1.4.2_04 on Wimdows XP Pro Spk2 I have a java desktop application using JTabbedPane ...
A: I can't really say what the issue is. Is might be related to the command window being visible or ...
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| Roman Letters to Numerical Value | 7/23/2005 |
Q: I have a project to do. I am not asking you to give me the whole answer. I want some tips and hints ...
A: Java is used in a wide range of areas. Many jobs require experence in J2EE or J2ME. There are also ...
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| Related to Java main arguments | 7/21/2005 |
Q: I was developing a gui for my java application, so that user can enter the input(arguments) in the ...
A: Im not entirly sure what you are trying to do. Does the program run without a gui, on say the ...
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| plz explain oops concepts... | 7/20/2005 |
Q: plz explain oops concepts in detail.are they not in c?
A: c can have oop, but it is not easy to do (c++ has oop). The fundemential idea o oop is that you ...
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| Reverse number | 7/19/2005 |
Q: i'm kinda new in Java. Im supposed to write a program that will reverse a given number using modulo. ...
A: You will need a while loop. when you % a number by 10 you get the last digit. E.g. int a = 1234 int ...
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| how is use userdefined package | 7/14/2005 |
Q: how to use userdefined package in a pregram
A: If you mean how do you declare packages, just use the package keyword e.g.: package mylib.mypackage; ...
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| Rotating Numbers | 7/10/2005 |
Q: I'm trying to rotate the inputted word.. there seems to be an error that i don't really understand. ...
A: Your program seem to be written not to expect a space between the word and the number. What happens ...
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| java reverse prog | 7/7/2005 |
Q: i have to do a programming in java that will reverse a given number, for eg. 1 2 3 will become 3 2 1 ...
A: well if you mod 10 a number you get its last digit. If you divide a number by 10 you cut off the ...
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| adjacent repeating letters | 7/3/2005 |
Q: Some words have adjacent repeating letters. For example, the word “tomorrow” has a double ‘r'. In ...
A: Well it sounds fairly simple, just iterate though the characters, keep the last character stored, ...
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| call toanotherprogram | 6/27/2005 |
Q: I made 4 programs in java(p1.java p2.java p.java and p4.java) the first ones shows the option to ...
A: You generally don't call one program from another (although you can) instead you generally call a ...
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| hello | 6/21/2005 |
Q: So maybe you are suggesting that C++ would be a better language to work with? What I am doing is I ...
A: Its not really the language, rather its whatever API you find that will handle the video. If you ...
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| hello | 6/19/2005 |
Q: I want to devise an application in Java that is feed video from my camera through the firewire port ...
A: Java cannot do it by its self, there might exist some library that would assist you in this. You ...
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| Java | 6/19/2005 |
Q: I think Java is installed on my pc but do I really need it ? What can it do for me ? I'm 76 and get ...
A: Java is not really a program, rather it is a tool required for some applications to run, espically ...
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| Java Question - How to | 6/9/2005 |
Q: How would I write this program with a for loop? public class PenniesForPay { public static void ...
A: Since your program calls System.exit in the while loop, I do not understand what you are doing. ...
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| Delete of a record in a pgm j2se | 6/7/2005 |
Q: I made a programa in Java. The query, insert and Update work ok. The delete opcion have the ...
A: Your delete needs a from e.g.: Delete From Empleados where IdEmpleado=3 Also you should not use ...
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| entering a given .class file!! | 6/2/2005 |
Q: ! i would like to ask a simple (probably) question, but i really don't know what to do with that! i ...
A: You must make sure that the .class file is in your classpath. E.g. If you run javac on the ...
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| chars and strings | 6/1/2005 |
Q: i have the following question that seems very simple but actually i was unable to answer ok, a ...
A: String var = ""+ch1+ch2; This works since this statements resolves to: String var = (""+ch1)+ch2; ...
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| Changing the working directory in Java? | 6/1/2005 |
Q: I know that the following changes the the "user.dir" property of the Java program, but through my ...
A: You don't, changing user.dir is not supported in the java platform. You should consider writing your ...
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| ; expected. Why?? | 5/29/2005 |
Q: i'm writing a program in java, everything is correct but the compiler hits wrong at the following ...
A: You should declare totalarea up front instead of redeclaring it in the for loop. Also (assuming ...
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| cloning in java | 5/25/2005 |
Q: what is cloning in java & types of cloning in java.
A: cloning is the copying of an object to create an identical object. The method clone() in Object ...
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| Calling outside programs and commands in Java? | 5/22/2005 |
Q: In Java how do I call programs/processes (.exe,.bat,.pl, etc.) that are located elsewhere on the ...
A: To execute external programs you would use: Process someAppProcess; //Handle to the process, you can ...
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| I want to learn JAVA in a month | 5/22/2005 |
Q: How are u? I am working in a QA(testing)environment. I want to shift my career to Development ...
A: 30 days is somewhat hard to learn java in unless you are already quite versed in a language like ...
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| String vars and input classes | 5/21/2005 |
Q: i have two questions for you: when i write some code like the following: string stringVar; ...
A: Question 1: "hello" doesn't go anywhere. stringVar is mearly a reference to "hello". If there are ...
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| exception handling | 5/19/2005 |
Q: Here's the basic structure of my program import stuff; ...
A: 1st do not have file operations in your paint method, you do not want to reparse the file every time ...
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| java | 5/19/2005 |
Q: why java does not support multilple inheritence? what is c.v.s?
A: see an answer about multiple inheritence: ...
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| displaying letters | 5/17/2005 |
Q: im currently making a game of hangman whilst learning java my current problem is that if i have a ...
A: It does not appear you are actually changing display. Strings cannot be modified, calling ...
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| hashcode() !!!!!!!!! | 5/17/2005 |
Q: I dont know how to implement hashcode, and i need it urgently. can u please tell me the code for it ...
A: Just borrow the hashcodes from addrBookName and emaList. E.g. public int hashcode() { return ...
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| applet keep loading but not run | 5/16/2005 |
Q: I have created an applet which is run by number of .class files which i have zipped and inclusing ...
A: There are a couple of options you can use. 1st you can use the appletviewer to run the applet ...
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| Query takes Logger time to Execute | 5/15/2005 |
Q: i am doing the development in the J2ee arch.(ejb and struts frame work). will it work by doing like ...
A: Since I only have experence with J2SE, I don't think I can help you all that much. But I think ...
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| java code helppppppppp | 5/13/2005 |
Q: How are u Plz help me I want to ask about java code on how to get the value from multiple choice ...
A: Im not entirly sure what you are stuck on. If you are using radio buttons then you must be using ...
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| Constructor and destructor | 5/13/2005 |
Q: Does Java has destructor? If yes, how do I code them in my program? Thanks in advance. Good day... ...
A: Yes, the finalize() method is called before the object is to gced. Note that the invocation of ...
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| Query takes Logger time to Execute | 5/10/2005 |
Q: I have a query which takes a logger time to execute( In EJB gets timeout). Query is almost tunned . ...
A: By background task, you probably mean Thread. E.g. if you have a JButton that you are excuting a ...
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| random disguise | 5/7/2005 |
Q: im currently making a game of hangman and i would like to be able to print out a random word from my ...
A: you could try using the random class: import java.util.Random; ... Random random = new Random(); ...
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| Serialization | 5/3/2005 |
Q: I want to know what is Serialization.What is the meaning of the serialized state.What is the meaning ...
A: Serialization is the process of transforming an object to binary data that can be stored on say a ...
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| wordlist hangman | 4/22/2005 |
Q: im trying to make my word list for hangman using an array. I want to be able to add more words to ...
A: First you should put your words into a file. If you format your file if return delmited you can use ...
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| Data files outside of jar files | 4/21/2005 |
Q: I am making a spaceshooter game in java. This game has a highscores list that is saved in a txt ...
A: First you cannot use getResource to get a writable file. You can only read from these resources. ...
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| compile .java code in Unix environment | 4/20/2005 |
Q: I've taken over a Java project but don't know the basics of compiling .java code into .class ...
A: javac will use the newer of .java or .class files when compiling. If the code depends on any ...
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| objects and equality | 4/18/2005 |
Q: my question is simple and straightforward: how do you compare objects for equality? to make my ...
A: Labels are Components, they are only equal to themselves. If you want to see if they have the same ...
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| java | 4/17/2005 |
Q: I would like to ask about a Java homework assignment I can't solve. : Develop a Java application ...
A: Well this depends on what you are having trouble on. 1st if its reading in the data, you can use a ...
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| Reading and Writing Serializable objects | 4/14/2005 |
Q: I have a file called "messageFile.dat". This is a binary file of objects, It was written using ...
A: For the most part you read them back in the same way you wrote them: ObjectInputStream inputStream ...
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| Java question | 4/14/2005 |
Q: i have a question about java,please hel with this; These are the tasks • To multiply two positive ...
A: Aside from doing multiple subtractions, additions, shift operators (i.e. emulating what is already ...
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| Priority Queue | 4/13/2005 |
Q: I want to create a queue. Elements are added to the queue in order of priority (High priority ...
A: I am not entirly sure what you want. Elements are added into a data structure in any order. The ...
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| pdf & web data manip and extraction | 4/11/2005 |
Q: I am a novice and would appreciate any path you light that may assist in future programming tasks I ...
A: 1. I have tried various java APIs for pdf documents (the free ones). I have found that for any ...
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| Internet | 4/11/2005 |
Q: Is it possible to dial modem or connect to internet from a java application? If possible please tell ...
A: Java has many operations once connected to the internet (or intranet). There might be a library that ...
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| Java programming | 4/11/2005 |
Q: I am working on building a Java program for a database.That holds names, address, city , etc I have ...
A: "where a window will open and not to have to use the DOS prompt" Use javaw to startup an application ...
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| gui/swing | 4/9/2005 |
Q: i am a self-taught computer science student i've been studying for about 3 months the java ...
A: The Swing library is a gui library that is written entirly in java using an object oriented model. ...
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| toString(int i) method of converting an int to a string | 4/8/2005 |
Q: First off thanks for answering my question before, had figured out the toString method...But this ...
A: You should probably make a class to store an integer and a String. Then just have an array of that ...
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| Java Technology Architecture | 4/8/2005 |
Q: I would like to know what are the Background methods happening in JVM when a Java Program works from ...
A: This depends on what your program is doing. If you are using the gui then there will be an event ...
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| Overwriting/Deletion in a text file | 4/6/2005 |
Q: Heyas, I'm making a project for a PDA using Java (a mix of Java versions not exceding 1.3). I ...
A: I don't really have experence with J2ME (if thats what your using). But I know in J2SE you can use ...
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| Probably trivial for you but... | 4/6/2005 |
Q: Sir, Below is a copy / paste from part of my program. A class contains the following methods to use ...
A: Im not entirly sure what you are asking, but it does seem that you are not converting bytes to ...
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| Hash Tables | 4/1/2005 |
Q: Hey again, I think that's the right answer, but it leaves me with a problem still. I want to ...
A: You can store the value as a Vector (or ArrayList). Just pull out the Vector and add a value. As for ...
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| Hash Tables | 3/31/2005 |
Q: Heyas, I need to store a bunch of objects i've made in some sort of data structure. My objects ...
A: You don't need a two dimensional hashtable. You can put Points into a hashtable, and that will work ...
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| JTable handling | 3/31/2005 |
Q: I have a jTable with columns "date_from", "date_to", "description". I would like to protect the ...
A: Here is a sample I made that, if the user selects a cell in which the value in the first collumn of ...
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| drag and drop animation | 3/25/2005 |
Q: I still can't get it to work, here's the code import java.awt.*; import java.awt.event.*; import ...
A: There are various problems with this code, like a missing } for the end of your mouseDragged method. ...
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| Java I/O and Char variables followup | 3/23/2005 |
Q: and sorry about not being clear. I actually meant char variables as in the primitive type, e.g. ...
A: You can use the read function of the reader. The return value is int though so you will need to cast ...
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| Java I/O and Char variables | 3/23/2005 |
Q: I hope this question isn't too simplistic, but I was wondering how you write to a char type using ...
A: Im not entirly sure what you mean by "write to a char type". If you mean using different character ...
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| RTFEditorKit with JEditorPane | 3/22/2005 |
Q: The RTF that is doigg this is as follows: CARLISLE DOES NOT WARRANT PRODUCTS UTILIZED IN THIS ...
A: I guess Im not sure how you are setting your your editor pane. I tried this code: import ...
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| Character By Character Input In Java 2 | 3/20/2005 |
Q: First Of All Thankyou For Answerring my previous query about java character by character input. You ...
A: I'll assume you know how to do this in c++. first make a private native static function in your ...
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| drag and drop animation | 3/19/2005 |
Q: It is much appreciated! I just have a few simple questions in regards to what you sent; 1 - In your ...
A: 1. This code is overriding the method processMouseEvent, just add it to your panel's code. 2. What ...
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| Character By Character Input In Java | 3/17/2005 |
Q: I want to take input form user character by character (that is user enter a single character and it ...
A: Doing this would require JNI. The command prompt is really meant as a simple way of communicating ...
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| drag and drop animation | 3/16/2005 |
Q: I was just wondering if you could help me out, I am a bit stuck. I am trying to create an interface ...
A: What you want to do is to store and playback the mouseEvents In your DragBallPanel override the ...
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| JAVA2 RUNTIME | 3/10/2005 |
Q: I have 3 versions of Java2Runtime in my list of program files.Until recently, I did'nt know they ...
A: There is not too many reasons to have multiple java2s. A few might be: 1. If there is a bug that ...
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| parrallel array's | 3/10/2005 |
Q: If the colours are sorted it will be from the top red, green then blue. The search method should ...
A: well in that case you can use the int value of the rgb to compare colors with. E.g. import ...
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| parrallel array's | 3/7/2005 |
Q: well, the search method is so the user can input a search colour. i will call the search from the ...
A: If you sort the colors red blue green purple, which one is first, last? How is the user going to ...
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| error with Java applet | 3/4/2005 |
Q: WidgetApplet.java:13: WidgetApplet is not abstract and does not override abstract method ...
A: The first error is due to not correctly declaring a method that is called itemStateChanged that ...
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| parrallel array's | 3/4/2005 |
Q: I am currently trying to write a program that allows me to set up three parrallel array structure in ...
A: normally you would not use parallel arrays for this. There are some considerations you have to ...
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| Input from Scanner. | 3/2/2005 |
Q: I hope you are doing fine. Actually, i working on a project. I have one difficulty in that. I want ...
A: Since there is no universial scanner interface, using any library that allows access to a scanner ...
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| Control scrolling in text area of Swings | 3/1/2005 |
Q: How to control scrollbar of a text area using a button?i.e.,I want like when the user clicks on that ...
A: First off text areas don't have scroll buttons. Instead they are placed in scroll panes. Then you ...
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| member variable scope | 2/28/2005 |
Q: (see end of message below) : Hi, I'm learning Java and have following SIMPLE code snippet. ...
A: You would need an instance of class X. There can be more than one. So when you create the button ...
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| java | 2/27/2005 |
Q: I am writing a Java program in which the user enter the quantity of each fruit to be purchased. It ...
A: int change = ... int dollars = change / 100; change %= 100; int quarters = change / 25; change %= ...
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| Swing-Frames | 2/25/2005 |
Q: 1) How to make frames of different shapes, i.e; round,ellipse etc. shaped frames in swing? 2) ...
A: 1. Since this is not supported on all platforms you are limited to square frames/windows. If you ...
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| how to create a random question? | 2/25/2005 |
Q: i have a problem creating a random question for each user who logins, i mean i'm creating a desktop ...
A: To generate a random number you can either: 1. use Math.random() to get a double and use that e.g. ...
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| Java applets | 2/24/2005 |
Q: I recently installed a program called Video Ads Blocker, then I uninstalled it on the same day. Now, ...
A: This depends on a couple of things. 1st what vendor are you using java from. If you are using/want ...
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| hashCode method | 2/23/2005 |
Q: 1) In which cases hashCode method is used? 2) How to get a string back from the hashcode obtained ...
A: 1. Hashcode is used in various places, more spefically in classes that rely on hashing objects such ...
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| package | 2/23/2005 |
Q: whenever I am trying to make some packages outside the bin directory.I am able to makes them, as I ...
A: You are not making any sence: packages in java are part of a class name they allow declaring a ...
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| "Final Year Project Ideas" | 2/23/2005 |
Q: i m doing Bachelor of s/w Engg. and i m in final year.I need some final year project ideas using ...
A: First java has three main areas of development: J2ME for cellphone applications J2EE for server ...
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| compiler | 2/23/2005 |
Q: one is likely to find different compilers made by software houses. One factor of comparison, for ...
A: Your question is not clear? You are not making any sence. In any case there really are not that many ...
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| Software development in java | 2/15/2005 |
Q: I have one more niggling doubt.You said that java code can be easily reverse engineered,so is it not ...
A: Users will still have to put in a good effort to reverse engineered java programs (espically if ...
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| hi | 2/15/2005 |
Q: I am not really sure is this the right topic but here goes... I would like to know what is the main ...
A: 3rd gen languages interact directly with the machine, you can tell the computer exactly what to do. ...
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| Software development in java | 2/15/2005 |
Q: I am a newcomer to Java though I know programming in C.I am interested in learning to develop my own ...
A: There is no one language that works for everything, otherwise there would be only one language. ...
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| java | 2/7/2005 |
Q: can u explain security problem in applets
A: you are being a bit vague... but: In order to ensure that an applet does not take over the system ...
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| Use of JNDI for getting database conn | 2/4/2005 |
Q: Harper.. I added this exception clause in the main clause /* public static void main (String args ...
A: I prodived you not with a way of getting your code to compile. If you want a less debug way of doing ...
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| Find the greatest sum with moving cursor | 2/2/2005 |
Q: This is an interesting programming question that I would like your help to solve. Though the ...
A: Lets say you have a MxN grid. Then initilize N states which include the current progress and N new ...
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| split method not apparent in earlier version of JDK? | 2/1/2005 |
Q: Ive stumbled upon a little bit of a problem here, im programming a financial package as part of my ...
A: Yea its pretty easy using StringTokenizer: StringTokenizer tokenizer = new ...
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| core java | 1/31/2005 |
Q: 1)Can U Just Explain the OOPs concept with general example and how to implement tese concept in ...
A: 2. The act of either throwing a checked exception or calling a method which declares a checked ...
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| troubleshooting | 1/30/2005 |
Q: I'm trying to open Geocities Page Builder. Go to www.geocities.com and page builder link is there. ...
A: Well Im not sure exactly where the problem is happening. It could be a popup blocker is preventing ...
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| Java and cellphones | 1/30/2005 |
Q: I have a WAP cellphone and it lets me download and play java games. Is it possible for me to write ...
A: Sure its possible to do that. Writing games or any complex program takes quite a while to do. For ...
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| Question | 1/26/2005 |
Q: Sir, I have a topic, Please give me some potential comments on this topic so anyone can read, easily ...
A: My experences with extreme programming is that it can be used to quickly implement a feature since ...
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| socket programming : chat program | 1/20/2005 |
Q: How to create the chat program where one server can chat with multiple client at the same time. For ...
A: This can be a big undertaking. A few pointers: Classes you want to look at: java.net.ServerSocket ...
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| Image to Buffered Image | 1/19/2005 |
Q: I hope you are doing fine. I have a question regarding saving an image. i want to introduce the ...
A: 1. Simply draw the image to the buffer. 2. ImageIO class is the only class in the standard api which ...
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| garbage collector | 1/18/2005 |
Q: i read in boooks that we can demand garbagecollector by using Runtime.gc() is it true? can we ...
A: When control has returned from gc as much garbage has been collected as possible. Although you are ...
|
| I want to know:
1. How is... | 1/17/2005 |
Q: I want to know: 1. How is the tab control implemented in Java? 2. Is there any provision for ...
A: 1. JTabbedPane is a gui class that simulates (does not use!) a "tab control," it does not actually ...
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| java programming | 1/17/2005 |
Q: java programme for moving an image alongwith the mouse movement
A: Lettts see here. I could pull up a piece of code I have, but it is a bit complex. So I'll just make ...
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| Why does the following code print nothing? | 1/16/2005 |
Q: Why does the following code print nothing? --------------------------------- public class Test{ ...
A: well it should print out "true", but not "Equal". This is because Strings can only be equal to ...
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| java / animation | 1/15/2005 |
Q: my name is Naoufal Kassari and i studie java programation, i want to create many animation with ...
A: Animation is fairly easy. Simply parametrize your drawing rotinue, and have a Timer that changes it. ...
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| How to calculate and show the remaining time left in a JProgressBar | 1/11/2005 |
Q: i have created a JProgressBar, that shows me the progress of my task in terms of ...
A: Well there are various formules you can use. A simple one is: time diff*bytes copied/bytes remaining ...
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| Classes | 12/17/2004 |
Q: ! the "wrap" is declared as follows at the bottom of JTextArea.java public class JTextArea extends ...
A: You will notice that the only place that wrap is "used" is in: public boolean ...
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| about security | 12/13/2004 |
Q: i know some generators can decode the .class file to source code... is there anyway i can prevent? ...
A: There are obfusicators that can make it more difficult to decompile class files. Making .class files ...
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| improving java | 12/10/2004 |
Q: java doesn't accept writing a function inside another function(nested subprograms).I want to add ...
A: Although java does not permit functions in functions, you can put classes in functions and functions ...
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| Picture show program | 12/3/2004 |
Q: I have a HW . it is about displaying a picture in a frame and there are 4 buttons to do the ...
A: I don't do entire problems (genarlly) espically not homework, since its your class and your ...
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| .net service to java service | 12/3/2004 |
Q: We have .net command line service that we use internally. This service can do the following ...
A: There are sevelal ways of doing this. using Runtime.exec(...) you can run any appication, get its ...
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| Classes | 12/3/2004 |
Q: ! i have overridden the getScrollableTracksViewportWidth() method and made it to return true, which ...
A: I just haven't had enough time to determine what the appropiate solution is. Fundimentally what you ...
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| Classes | 12/1/2004 |
Q: ! i tried but i don't get the expected results. I tried getting the method from JTextArea, but it ...
A: If you override the method and return true, Then word wrap is off. However when you return false, ...
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| core java | 11/29/2004 |
Q: Is it possile to write a java program without main,createobjcts ,call the methods?
A: Yes it is possible to have a fully functional java program without a main, however it is a hack to ...
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| Java Calculator | 11/23/2004 |
Q: Im currently designing a calculator using java. I have designed the GUI and it seems to be ok, ...
A: You can use replaceSelection to either insert text where the users cursor is or replace text if it ...
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| convert from int to byte | 11/22/2004 |
Q: i am trying to convert an array from integer to byte but i don't know how would you plz help me, ...
A: First, createImage accepts either png, gif, or jpeg format, not raw. For using raw rgb data use ...
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| Classes | 11/21/2004 |
Q: ! actually, i found out a way to find out the button click of a tab. I used the mouse motion ...
A: This is (again) the responsibility of the UI. You could probably override the calculateTabHeight to ...
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| Jvm & threads | 11/21/2004 |
Q: sir, 1>how many minimum threads willl run when u launch ur class with main method only. how many ...
A: This depends on JVM version, platform and java options. On my system (win xp) running jVM 1.5, I ...
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| Classes | 11/17/2004 |
Q: ! what you said i understood. Actually for my text editor, i'm using a vector to hold filenames for ...
A: You can add a ContainerListener to recieve events when a component is added or removed, this however ...
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| Classes | 11/17/2004 |
Q: ! just now after the previous reply, i understood everything. But now, im facing a new problem. How ...
A: Well in my example I record the index of the tab in the CloseButtonAction class. You can ask the ...
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| Java Question | 11/17/2004 |
Q: What would the code be to create a class that returns the smallest set of unit-length closed ...
A: Let me see if I understand this correctly: If your input is: 1, 1.3, 3.2,3.3, 3.5, 4.5. So you would ...
|
| hi,
A simple question,... | 11/16/2004 |
Q: A simple question, but i m tired of searching. I am talking about the signed jar, what's LEGAL ...
A: Signing a jar mearly means that you are asserting that this jar came from you and it is unmodified. ...
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| Classes | 11/15/2004 |
Q: ! i tried the following code, but the button is added to the main tab area and not to the tab title. ...
A: As I said, whatever you add must implement UIResource. This means you need to extend JButton and ...
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| Classes | 11/13/2004 |
Q: ! but in what way does implementing UIResource for the class CloseButton prevents it from creating ...
A: 1. The method implementation of addComponent in JTabbedPane goes like this: public void ...
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| Classes | 11/12/2004 |
Q: ! the reply you gave is working perfectly. But i need some more clariffication. I understood all the ...
A: Insets are the buffer around a component. If you increase the buffer it allows for more white space ...
|
| java | 11/11/2004 |
Q: "i have developed a console based chat program. there is n client's and one server. server has to ...
A: you cannot use goto since java does not support it. You cannot really allow someone type a message ...
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| java | 11/11/2004 |
Q: "i have developed a console based chat program. there is n client's and one server. server has to ...
A: Its hard to say whats wrong. A few guesses though: 1. make sure you spell quit correctly (it looks ...
|
| Classes | 11/10/2004 |
Q: ! I have currently extended JTabbedPane class to my own class (NewTabbedPane) which contains methods ...
A: Doing this is not easy, but I spent the time and wrote up a simple example of how to have close ...
|
| Classes | 11/9/2004 |
Q: Or have u noticed netscape browser? They have a small 'X' button at the end of the tab bar. Is it ...
A: The netbeans source is there. When you choose to download, just scroll down to "Other distributions, ...
|
| objects(in java) | 11/8/2004 |
Q: Can an object have more than one type?
A: Depending on your defination of type... An object can be referenced as its class or one of the ...
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| Classes | 11/7/2004 |
Q: ! i couldn't fully understand what you mean. Could you plz explain in detail?Hi!! actually what im ...
A: Every swing component has a ui class that is responsible for rendering it, and deciding how the user ...
|
| Hi Mr. Harper,
I want to... | 11/7/2004 |
Q: Harper, I want to create a program in Java (an applet) that, adds, subtracts, multiplies and ...
A: To determine if a fraction is in lowest form, just determine if the gcd if the numerator and ...
|
| object factories | 11/4/2004 |
Q: I have been trying to understand the idea behind object factories in Java, but I only have access to ...
A: A factory is basicly a dispatcher to retrive an object that follows the citeria that is given. The ...
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| Classes | 11/4/2004 |
Q: ! i still get the StringIndexOutOfBoundsException. I already told you that im making an editor for ...
A: You are either going to have to use a library that already does that. Or you have to override the ...
|
| changing content inside a tag in a HTML file using Java | 11/2/2004 |
Q: Your answer wouldnt help me, because I dont have any attribute inside the tag. Its just the text ...
A: well just use addAttribute, except use the special IMPLIED attribute. E.g. ...
|
| Converting to Gray-Image and display it | 11/1/2004 |
Q: I am trying to Convert an TYPE_INT_RGB into a gray scale image, by the ...
A: Here is a sample that works, although it does not use the ColorConvertOp. My intial guess is that ...
|
| Non-static variable and static context | 10/30/2004 |
Q: I need to print the database's data on a TextArea of a standalone application . I used ...
A: The easiest solution (but not the best) is mearly to declare the area as static. I would first try ...
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| Classes | 10/29/2004 |
Q: ! im trying your previous reply. Is there a way to find the Charset of a file through java?Hi!! the ...
A: There is no way to "find" a charset, instead you can guess the format given some of the characters. ...
|
| Linked Binary Tree | 10/28/2004 |
Q: I am trying to figure out a different method to find the height of a linked binary tree other than ...
A: Fundementally you can express anything without using recursion. Just use a stack to simulate ...
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| Classes | 10/28/2004 |
Q: ! the solution you gave works out. But there is one problem. When i open the "jdkhome.reg" using ...
A: The reg file is in unicode. You would use something like: import java.nio.charset.*; BufferedReader ...
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| Classes | 10/27/2004 |
Q: ! thanks for being very cool with me. You r absolutely right. Im looking for the path of javac. ...
A: This is a horrible hack, but it *should* work on a windows platform. Use Runtime.exec("regedit /e ...
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| Classes | 10/26/2004 |
Q: I tried getting the properties dump. But no property is having its value as "C:\J2SDK142" or ...
A: Let me make this clear: Without using JNI (on windows only!) there is no way to determine the ...
|
| core java | 10/26/2004 |
Q: sir my question is 1> whats the difference betwen Reflexion& Introspection. 2>how many maximum ...
A: Introspection is a spefic kind of Reflection, in that it only tries to determine information at ...
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| Classes | 10/25/2004 |
Q: Actually java is installed at "C:\J2SDK142" and its JRE at "C:\Program ...
A: Since there can be many or none jdk installations, there is no clean way to determine the path to ...
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| Classes | 10/23/2004 |
Q: ! that was a wonderful answer. It worked perfectly. Actually, im trying to do a small ide for java ...
A: The java.home varible should be (unless you change it using setProperty) the directory of the ...
|
| About Enumeratoion | 10/22/2004 |
Q: how are you I want to know about Enumeration what is that and about hasecode and hashmap ...
A: An emumeration simply is a list that you can enumerate though, that is get one value at a time from ...
|
| Error Message from a Serialization Project | 10/22/2004 |
Q: Artemus, Thank you for your timely response. Actually, I tried different ways either change the ...
A: oh right you also need to switch the arguments you are using... Your constructor has String,float ...
|
| Classes | 10/21/2004 |
Q: ! java is installed in my system and it is working perfectly. But i want to find the installation ...
A: Let me get this straight: you want to determine the location of the java install directory from a ...
|
| Set Font in JEditorPane | 10/21/2004 |
Q: I am able to set font in JTextField but somehow am not able to set font in JEditorPane. I have ...
A: Since you are writing a chat program, you probably want to allow different fonts in your program. ...
|
| Classes | 10/19/2004 |
Q: ! i have the following problems: 1. There is a main class called "note". This class "note" is used ...
A: 1. Its not clear what you want to do. If you wish to access stuff outside a package it must be ...
|
| Send image over network | 10/19/2004 |
Q: I would like to load an image in 1 of a chat clients and the rest of the other clients that is ...
A: One possible problem is that the read method of filestream doesn't necessarly read the entire file, ...
|
| java | 10/16/2004 |
Q: what is the difference between interface and abstruct class, expalin in detail
A: An interface is just like an abstract class except: 1. interfaces cannot contain non-static fields ...
|
| building a mail server | 10/13/2004 |
Q: i am planning to build a small mail server that will collate all the different mails people have ...
A: First, before you start you should consider any legal implications this may involve. Creating/using ...
|
| mediatracker | 10/12/2004 |
Q: sir can u plz tell me what is basically use of mediatracker class in our prgms.i m not getting for ...
A: In order to streamline the effectiveness of loading images, most operations which create an image ...
|
| ImageIcon and getPath() | 10/12/2004 |
Q: i'm am doing a prgram that display's a digital image in it by a JLabel and you can choosing it by a ...
A: you should not have to worry about slashes at all. Chances are the image is not valid or is ...
|
| How to determine if an application has bound a socket | 10/7/2004 |
Q: I need to know if Sun Java System Message Queue is running (in order to start an application that ...
A: I really have not used JSM, but if it is a system wide app, there is probably a way to determine if ...
|
| reverse the file contents | 10/6/2004 |
Q: I want to reverse the contents of a text file and store it in another file.Means the content of ...
A: Well first, what do you mean by reverse? It can mean: 1. reverse every character so that the first ...
|
| java applets (circle) | 10/5/2004 |
Q: I have the following coding using java applets, my aim is to create a circle, which when clicked on, ...
A: well in the init method (make one if you don't have one), you create a mouse listener for the app. ...
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| java swing/gui dialog box | 10/1/2004 |
Q: Do you know of any way to close a dialog box automatically or have it refresh automatically to keep ...
A: Im not entirly sure what you want. Dialog boxes can be closed at anytime by using setVisible(false) ...
|
| Hi, Mr.Harper,
Thanks for... | 10/1/2004 |
Q: Mr.Harper, Thanks for your great help! I tried the first solution by using following command: javaw ...
A: 1. Its not common to require a lot of memory to run the VM. I think the default size is 90M 2. If ...
|
| Internatinalization | 9/30/2004 |
Q: I am doing the multilingual system (in Thai). Technologies used are JAVA and Oracle9i. The question ...
A: Its hard to say. How are you getting the information from the user? It might be the interface the ...
|
| java ann dist ributed client/server | 9/25/2004 |
Q: Please I need to know the difference between java and a distributed client/server
A: A distributed client/server acts together to give content to the user. The client is the gateway for ...
|
| Doubts -reg[Applet and Swing] | 9/23/2004 |
Q: sir i am a final year Computer Engineering Student in South India.i started learning java for past ...
A: 1) if you are going to have it on the web use an Applet, otherwise use swing. 2) consider use a ...
|
| array problem | 9/23/2004 |
Q: i create an array to allow user to enter their 5 favourite numbers.then from the 5 numbers, this ...
A: You need to pass in the array of ints to the compare function i.e. public static int compare(int[] ...
|
| about exception while running the program | 9/22/2004 |
Q: when i compile the program ,it gets compiled.but after running the program it gives me ...
A: if you want to run an applet that does not have a main function, you must create an html file for it ...
|
| Swing Layout | 9/20/2004 |
Q: My JFrame has a BorderLayout. I am placing a JTabbedPane at the North. I want that when the user ...
A: well the JTabbedPane is a combination of the tabs and the container that holds each item that the ...
|
| JAR encryption | 9/20/2004 |
Q: I got an applet. How can I prevent anyone from downloading it & decompiling the class file? Can I ...
A: Although you cannot prevent anyone from decompiling or downloading it (the jar has to be downloaded ...
|
| File Choosers | 9/18/2004 |
Q: i'm making an image-only FileChooser and made the main JFrame that has a Button to display the file ...
A: Its hard to determine what is happening... 1st are you puting out debug statements to determine if ...
|
| When I try to run a game at... | 9/18/2004 |
Q: When I try to run a game at Pogo.com it won't start. I think it has something to do with javascript
A: I would check the help section of pogo and see if you meet the system and sofware requirments. Since ...
|
| Interfacing with other apps | 9/14/2004 |
Q: I want to interface another application thru a java program. Something like - type a character in a ...
A: I suggest you get clever, a commandline program which allows you to control winamp, and run that ...
|
| Flash background colour | 9/7/2004 |
Q: I am trying to get the background on a Java Panel to flash from one colour, to another, and back ...
A: My guess is that your doing these operations on the Event Thread, usually happens when you respond ...
|
| query | 9/5/2004 |
Q: I am going to begin on a project called 'Back up Servers'. The only thinh i know about the project ...
A: Once you know more about the project you should look for libraries which fit the needs of the ...
|
| filestream | 8/27/2004 |
Q: could I get the basic syntax for opening a random access file, appending a one-byte value to it, ...
A: import java.io.*; public class AppendByte { public static void Main(String[] args) throws ...
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| Files' MetaData extraction | 8/27/2004 |
Q: I am wring a java class to be embeded within a webpage to display a table of files within a folder. ...
A: Nope, even if I was just using c++ I wouldn't have a clue on how to expose this information. I know ...
|
| Developing Rule Engine in Java | 8/21/2004 |
Q: Sir, Me & my friends have decided to develope a small rule engine at our level. We r currently ...
A: The only rule based lanuage I've had any experence with is OWL (and DAML). For that I used the jena ...
|
| Client/Server - Distributed Applications | 8/19/2004 |
Q: I am going to implement a project in a month but don't have the required knowledge for that, that ...
A: there are two direct apporaches to this: 1. use Sockets, with these you can send bytes over a stream ...
|
| Interfaces | 8/19/2004 |
Q: Interfaces have method declarations. My interface has five methods. I want to implement my interface ...
A: Here is an example: public interface Interface1 { void method1(); String method2(); int ...
|
| Swing drag and drop | 8/16/2004 |
Q: Environment : JDK : 1.4.2 Requirement: Would like drag/drop between apps as copy by default without ...
A: Example: import javax.swing.*; import javax.swing.event.*; import java.awt.datatransfer.*; import ...
|
| problem with painting the jcombobox value | 8/11/2004 |
Q: for your info, i've already added the repaint() but it didnt help except making things worst. if i ...
A: OK I took a closer look at your code (was a bit busy) First: Don't use getGraphics, unless your ...
|
| problem with painting the jcombobox value | 8/7/2004 |
Q: i'm using a 'for loop' to paint the chosen values of the jcombobox upon pressing a jbutton. the idea ...
A: The only thing I can think of is to call the super paint method first before you start painting. ...
|
| How to use Runtime.exec to invoke cmd.exe in windows? | 8/5/2004 |
Q: its quite right but its not complete, sorry if i'm saying that, how my Runtime.exec or javac and ...
A: First I will assume that you have a default directory set up to use. This also assumes that you want ...
|
| Convertion of C++ program in to Java | 8/4/2004 |
Q: Sir, In our Java WebBased project some functionality is written in C++ program as a supporting ...
A: There isn't tool I'm aware of that does this. And even if there were it wouldn't be perfect, aside ...
|
| How to use Runtime.exec to invoke cmd.exe in windows? | 8/4/2004 |
Q: i have no idea of how to invoke or calling the cmd.exe in my application with javac and ...
A: I think what your asking is how to get the output from javac.exe and java.exe. When you use ...
|
| Interfacing java, Ms Access and Ms Excel | 8/3/2004 |
Q: How do I interface java 2.1, ms access and ms excel.
A: What do you mean by interface? Run java code as a macro in ms access and ms excel or read and modify ...
|
| java table cell won't redraw automaticall | 7/31/2004 |
Q: I wrote a java program for stock market trading. The stock quotes are fed through internet from my ...
A: Since I do not have all the code: SampleFrame.java, my guess is that your not changing that data ...
|
| Could you please let me know what event is associated with JMenuItem accelerator key in swing? | 7/30/2004 |
Q: Could you please let me know what event is associated with JMenuItem accelerator key in swing? The ...
A: Well either its: 1: a focus problem, if something is grabbing the keyevent before the menu can react ...
|
| help please with handler(chain of responsibility) | 7/28/2004 |
Q: temperature < 0 degress, temperature > 40 degress it will store in either a Bin, Shelf or aisle. i ...
A: Well I see two problems with this code: 1. you are calling super.CheckCriteria, but this class only ...
|
| Changing an Image | 7/26/2004 |
Q: I'm sorry, I realized that after I had already sent it. Image Icon = ...
A: You cannot change the image once you make it. If you are drawing this image or if it is part of an ...
|
| Can you use a JList within a JTable column? | 7/26/2004 |
Q: I have very limited knowledge of Java Swing and have been assigned the responsibility of updating an ...
A: This depends on your current tableModel you are using for the table. If you are just using the ...
|
| Java GUI | 7/23/2004 |
Q: Sir,Is it possible to provide "Minimize" functionality to a JWindow?
A: No, a JWindow does not show up in the Taskbar. You can hide a JWindow, but not minimize it. You can ...
|
| Activating wav file | 7/20/2004 |
Q: I'm developing a Java 3D application and need it to play some audio (say for example to play a ...
A: Here is an example (wav format works): import javax.sound.sampled.*; import java.io.*; public class ...
|
| Question | 7/19/2004 |
Q: Sir I want to ask some detail about the topic. The topic is, "What in your opinion, is ...
A: Native Assembly will always be necessary, as java bytecode and MSIL (Microsoft Intermediate ...
|
| Java Swing Tool bar | 7/14/2004 |
Q: I can move the toolbar in my application but cant get the current changes made. i want to keep the ...
A: I have no good clean solution... but this example (although a bit buggy) shows how to get and set ...
|
| Application using LDAP | 7/11/2004 |
Q: I am working on LDAP (Lightweight Directory Access Protocol) and have to create an application in ...
A: I do have some extra time to help in projects like this. I cannot however guarantee a set amout of ...
|
| deprecated API | 7/11/2004 |
Q: well thank you for the answer, i solve it already, the problem is in the setting of Data ...
A: As the documentation states the reason that getText() in JPasswordField is depracated is that it ...
|
| error in JDBC driver | 7/9/2004 |
Q: i have this problem, i'm using the JdbcOdbc driver for MS Access, and it's work but it's produce ...
A: I've never use JdbcOdbc before so its hard to determine the problem. It is possible but unlikely ...
|
| about swing and awt | 7/8/2004 |
Q: what is the basic difference between awt and swing. is awt is peer base? if so how's that work ? ...
A: AWT is peer based. In the AWT framework the operating system provides the controls. And all of the ...
|
| Saving a linked list | 7/4/2004 |
Q: i have two linked lists, called patient and doctor. I want to save the data in the linked list to a ...
A: If you want a simple way of storing objects you can use the ObjectOutputStream and OBjectInputStream ...
|
| What is the difference between ActionListener and MouseListener? | 7/1/2004 |
Q: What is the difference between ActionListener and MouseListener? I want to know wether ...
A: The actionListener is called when an action is performed. I.e. a button is clicked or the components ...
|
| closing a frame with a JButton | 6/29/2004 |
Q: i am writing a program that simulates a hospital. in that the user is presented with a screen that ...
A: when the button is pressed simply call setVisible(false) then dispose() on the Frame. No need for ...
|
| Unloading and Loading another window? | 6/24/2004 |
Q: first, i'm just a begginer in Java so i'm not sure if my my question would be exact has i want to ...
A: To show a splash screen use a JWindow, since a JWindow has no borders or title bars. You can add an ...
|
| Java: How to access a java file | 6/4/2004 |
Q: I am making a game which is similar to "Who Wants to be a Millionaire" and I am wondering how I ...
A: If I understand your question correctly: You want to load a file that has the next question so you ...
|
| Help with Java | 5/30/2004 |
Q: I am trying the following, a client app will take an image and send it via tcp to a server. The ...
A: Well its not very hard: import java.net.*; import java.awt.*; import javax.swing.*; ... final ...
|
| JAVA | 5/29/2004 |
Q: about java bean, why we write the static key word in main function , and why we write the key word ...
A: main is static since its a more minimal starting point. If main was not static then the class that ...
|
| Data Encryption | 5/26/2004 |
Q: May i ask is there any data encryption technique in JAVA? and what is the method/technique do JAVA ...
A: Yes there is enncryptions rotinues in the java sdk. Look at the documentation for java security ...
|
| java input | 5/24/2004 |
Q: How can i input (strings,values)from key boad using JAVA.& How can i creat simple interface for ...
A: well for gui apps, you have to make a text field and say a button for the user to click when they ...
|
| java | 5/21/2004 |
Q: 1)when we are using vector? vector is thred safe it contain all methods are synchronized?when will ...
A: 1) I would have to look at the source code. If it isn't then you can synchronize on the vector to ...
|
| java coding | 5/17/2004 |
Q: respected sir my final year project is image compression.in that i want to create archieve ...
A: Your question is unclear. Do you want to use a local directory on the harddrive or not? What files ...
|
| About Java | 5/15/2004 |
Q: When I go to play games on yahoo or pogo or any other web site it tells me i don't have java ...
A: just because you have windows XP doesn't mean you have java installed. goto ...
|
| JAVA | 5/11/2004 |
Q: hey i really appreciated your help, i've been voting for you and nominating as well! its helping me ...
A: Something like this: int hit = 0; for(int i = 0; i < 3;i++) { char userChar = ...
|
| JAVA | 5/9/2004 |
Q: hey man, so far im progressing good with my program. i've been able to easily create 3 random ...
A: Although your approach would work preferably you don't want to simply "retry until you get it". The ...
|
| help | 5/7/2004 |
Q: just need a basic code of drawing a map.hi, help me with a code for drawing a map of a country, i.e ...
A: Well if you have the gif, jpeg, or png of the map you can create an Image using ToolKit.getImage(URL ...
|
| image | 5/7/2004 |
Q: In coding how can we identify image is grayscale or color? plz tell me
A: Although there are spefic techniques depending on the format of the image, if you want a general ...
|
| Programming Project - Need Assistance | 5/6/2004 |
Q: I'm having some difficulty writing a program. The requirements are listed below. Basically the ...
A: Well I don't really have the time to look though your code, but for say average you simply sum up ...
|
| BLUEJ | 5/4/2004 |
Q: I have Windows Me on my System.Where can I use these commands then? Please suggest. -pl.Hello Sir, ...
A: If you cannot find the command prompt, then you can make a batch file with those commands. Just ...
|
| BLUEJ | 5/3/2004 |
Q: .. My problem is ....... I have recently installed Bluej from a CD , on my system.Installation was ...
A: well I tried it and it works for me... try using this command in this command in the commandprompt: ...
|
| Other aproach i took | 5/2/2004 |
Q: this is how i tried making the images work ... but my applet does not initialize :( maybe you can ...
A: Double check where the images are trying to be loaded from. You should never assume the location of ...
|
| JAVA APPLET... making a game | 5/2/2004 |
Q: i have this war card game to write and i was so stuck on it that i did it the simplest way i could ...
A: The most common mistake in loading images is that they are dynamically loaded, so multiple images ...
|
| Touchgraph link browser right click won't work in linux jre 1.4.2 | 5/1/2004 |
Q: Wanted to mention that the touchgraph link browser(java client) client starts correctly in Redhat 9, ...
A: Im probably a bit out of my league on this one, but my best guess is that right-clicking is not ...
|
| java objects | 4/25/2004 |
Q: How can we know number of objects in java?Give me example code?
A: First consider if profiling is what you need, if you need this look at the documentation for the ...
|
| interaction of Java with C | 4/24/2004 |
Q: I have a program in c which takes in command line arguments and process them. Now, I need to make a ...
A: You aren't 100% clear on what you want. You can execute the java virtual machine and pass it the ...
|
| Hi Artemus,
How can I remove... | 4/23/2004 |
Q: How can I remove (not disable) the closing button on the right top corner of a JFrame? If can't ...
A: The closest answer I have is to use setUndecorated(true) on the frame. Unfortunally this also ...
|
| java | 4/21/2004 |
Q: How we can swing an applet?
A: well the same way you would upgrade an application into Swing. Go though and change the various ...
|
| java | 4/21/2004 |
Q: What is the purpose of applet programming?
A: Applet programming allow the creation of applets which can be automaticly downloaded and run in the ...
|
| File filters | 4/18/2004 |
Q: ! im using jdk1.4.1. I want to know how to extend the "javax.swing.filechooser.FileFilter" class so ...
A: Well its fairly simple: there are two methods that are needed to be implemented: accept(File f) ...
|
| java banner | 4/16/2004 |
Q: I am attempting to place a rotating banner system on my web site. I use coffee cup fro HTML and ...
A: well it looks a bit confusing, but try continuing the pattern by adding more of the same statements. ...
|
| java | 4/15/2004 |
Q: What is a byte code? What is the difference between .exe file and byte code?
A: well an exe is a program that can run on a Windows machine. byte code is the compiled code, but it ...
|
| get a Class path | 4/15/2004 |
Q: Sorry, this is not exactly my question. What I really need is that I have a java class, let's say ...
A: oh thats easy: In your example: java.net.URL url = Test.class.getResource("Test.class"); would get ...
|
| get a Class path | 4/13/2004 |
Q: How can I get a Java Class file path for a non-Servlet class? Thanks a lot! Zhenwu
A: Well first I ask why do you need the class path, since you very rarely need it directly. to get the ...
|
| java | 4/7/2004 |
Q: Why AWT components are called as heavy weight components and SWING components are called as light ...
A: Heavy weight since they are pinned down to the window, for example if you try and draw over the ...
|
| java | 4/6/2004 |
Q: How does thread synchronization occur in a monitor?
A: well simply put when you synchronize on an object or declare a (non-static) method to be ...
|
| background image of Applet | 4/4/2004 |
Q: How to make background image (with .gif or .jpeg) of an Applet? Best of all, refer me some sample ...
A: if your not using swing then add (possibly create) a call to paint a paticular image e.g. import ...
|
| java | 4/4/2004 |
Q: Which is the base class for all swing components?
A: You really should find this out yourself. But JComponent is the base class for all swing components ...
|
| java | 4/2/2004 |
Q: what is a JAR file?
A: a JAR file is just like a zip file except that it uses '/' as the directory sperator instead of '\'. ...
|
| java | 4/2/2004 |
Q: what is the function of garbage collector?
A: The garbage collector is responsible for unallocating unused memory. In that every time you create a ...
|
| java | 4/1/2004 |
Q: I am working on project IMAGE COMPRESSION.I want to make new archive means new file &then add the ...
A: If your going to be doing your own compression algrothim then simply create a subclass of ...
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| Java | 3/31/2004 |
Q: I am a new programmer in Java. Could U please Help me on how to do Core Programming. As such How Do ...
A: lets see here first make sure you have the following: 1. Java SDK J2SE (from java.sun.com) 2. An ide ...
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| Java VM graphics | 3/30/2004 |
Q: What is the simplest bytecode program for Java Virtual Machine to draw on a screen using I J K M ...
A: well even in java byte code calls to kernal methods take up space. But java code is compiled, and I ...
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| Java VM graphics | 3/29/2004 |
Q: What is the simplest bytecode program for Java Virtual Machine to draw on a screen using I J K M ...
A: ouch thats a bit rough with only 128 bytes. I mean to do any gui work requires you have to use java ...
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| Can't get japanese character using request.getParameter() in jsp | 3/28/2004 |
Q: I am trying to pass japanese characters from my html page to jsp . but when I am getting characrs ...
A: Its hard to say what the problem is but perhaps the display of the String is not correct... double ...
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| creating a program macro to fill in web forms? | 3/27/2004 |
Q: I have a question. I would wondering if you know if it is possible to create a program that can ...
A: The biggest problem in this is the controling web browser. Java can contact the web page and log in ...
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| ImageCompression in java | 3/24/2004 |
Q: heelo!sir, I study in IT Engineering in Gujarat(INDIA).I am final year student.And I select my ...
A: Your question is a bit hard to understand, but if all your asking is how to mimic the behaviour of ...
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... | 3/22/2004 |
Q: But Sir I am using version 1.3 of JDK. I guess there is no such method setDragEnabled in JTable for ...
A: Well the awt version of drag and drop is not simple. I would suggest looking at a tutorial if you ...
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| java:GUI,Networking | 3/20/2004 |
Q: We try to write a client program that should display the stock values of some companies. How could ...
A: well if your remotly connecting to a web site and parsing out the html on that page. Then you can ...
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| Using JPanel | 3/15/2004 |
Q: I am having a problem with a class that i created, a class that extends JPanel and i want to add it ...
A: well when you add it it is visible by default. And the default layoutmanager for JPanel should ...
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| java nio | 3/13/2004 |
Q: please help me as i am stuck, i am working on a server to convert it from using java io to nio in ...
A: well the only solution I can think of is to make an InputStream that reads from a ByteBuffer (or a ...
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| Mouse Entered event in Swing | 3/11/2004 |
Q: I am creating a calculator in Java using Swing and I would like a message to appear when they pass ...
A: just add a mouse motion listener to the button: e.g. import java.awt.event.*; ... ...
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| convert Word document to pdf, rtf,or html | 3/11/2004 |
Q: I want to remove the metadata-"last saved by", from a Word document,through an application. It seems ...
A: Since word documents are a closed format, its somewhat difficult to help. The only suggestion is to ...
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| how to substract time values in java | 3/9/2004 |
Q: i am new to programming and I would like to ask your help with simple java. How can I substract two ...
A: well your going to have to first parse out the string: String time; //get the value of time ... int ...
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| JTable | 3/9/2004 |
Q: I am writing a swing application that has a JTable. The JTable is supposed to be loaded with data ...
A: well thats tough... Here is an example of a split table, one that has two split views: import ...
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| JTable and XML file | 3/6/2004 |
Q: I would like to know how to translate a JTable data into a XML document(*.xml)? I would like to know ...
A: Since java 1.4 doesn't really have much support for xml, your probably going to have to use a ...
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| separate the string | 3/2/2004 |
Q: my question is i want to separate the string .ex:- if i entered in command line Prashant.Naik the ...
A: Just use the regular expression: This will replace all characters except for a..z,A..Z, and 0..9 ...
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| Exceptions | 2/28/2004 |
Q: Throwable class has constructors. When we can use that constructor? can we create an object as ...
A: public String unimplementedMethod() throws Throwable { Throwable t = new Throwable(); throw t; ...
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| method overriding in java | 2/28/2004 |
Q: I want to ask you a intresting question regarding method overriding. What is the difference ...
A: If you have the same methods in two classes, but the sub class declares it private it is know as ...
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| dictionary | 2/27/2004 |
Q: how can we make a dictionary program in java which sort just 10 words? example if i give ...
A: You can use the Arrays class e.g. import java.util.*; ... Vector people = new Vector(); ...
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| Java | 2/26/2004 |
Q: when i try to compile the java file, this message appear "java uses or overrrides a deprecated API, ...
A: You are using some method in the java library that is not recommend you use since it is out of date. ...
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| Swing +DB + JNI | 2/26/2004 |
Q: i'm new in Java2 and particularly i'm interesting on JFC Swing. Could you indicate me a good web ...
A: Well I got all my tutorials direct from the java developers site (http://java.sun.com) ...
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| comparison | 2/25/2004 |
Q: What should programming language I will use, Visual Basic or Java? Please tell me the advances of ...
A: VB is an easier to learn lanuage, but is more limited. You can do many simple things in VB, while ...
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| about swings | 2/25/2004 |
Q: please give me the importance of swings over applets. thanking u sir
A: swing is a java renderer components. Advantages: 1. Crossplatform look so your applet look the same ...
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| JList rendering | 2/24/2004 |
Q: FollowupThank you so much for taking your time to answer my question, Mr. Harper! In the 1st part ...
A: Well that partially depends on how you are making your ListCellRenderer. if you are making it as an ...
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| JList rendering | 2/24/2004 |
Q: 1.I am using Java SDK 1.4.2 on a Linux platform. 2.I have developed an application where it is ...
A: Your question is a bit confusing, but... If you have to you can just keep a reference to the first ...
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| reading input | 2/23/2004 |
Q: what is the command line for reading in a file (Standard input) into an array that one can ...
A: Well what you ask for is a bit vague. Do you want to manipulate the file, or just the array that has ...
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| user interface | 2/17/2004 |
Q: Cheers for the help but i am having problems getting it to work. I tried to install it which runs ...
A: Hrm it seem that the target environment doesn't contain a functional JVM. In netbeans you can ...
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| JAVA Project | 2/15/2004 |
Q: I'm having some difficulty with the below project. We are supposed to have three classes (Book.java, ...
A: Lets see here: first you will need some data structure to keep the patrons and the books, you can ...
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| Keypresses and Key events | 2/15/2004 |
Q: Hey, I appreciate your help in this. I'm just about low intermediate or higher beginner in my skill ...
A: what you want to do is have events for key pressed and key released, You can't change the key typed ...
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| gui | 2/14/2004 |
Q: 1- i need a container that can display images , text , flashes , applets at the same time , this ...
A: Well a basic container will do. For awt just subclass Container, for swing subclass JComponent, or ...
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| Java Applet | 2/13/2004 |
Q: I am desperatlety stuck on how to implement a situation where you get a square to move around the ...
A: This moves a square in a clockwise fashion, Im sure you can figure out how to change this to do ...
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| question on thread | 2/12/2004 |
Q: i am not undertstanding some concepts of java-multithreading. i have someQ1. method stop() has ...
A: 1. stop and yield are completly different. Yield simply temporarly stops to allow other threads to ...
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| whst is the code for implementing... | 2/11/2004 |
Q: whst is the code for implementing a change in colour of a button. For example instead of the grey, ...
A: well if you just want to change the button when it is unpressed, you can set the background color to ...
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| what is advantage of using... | 2/11/2004 |
Q: what is advantage of using java swings
A: Platform independinace, using swing you can ensure that all users will be looking at the same "look" ...
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| Java Applet | 2/9/2004 |
Q: I am trying to implement a situation where a user clicks a button on the applet to change the shape ...
A: Only rectangular object are supported in Java and html. You can resize an applet by using ...
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| Java | 1/5/2004 |
Q: I am required to do a final project in my java class which includes creating a game with at least ...
A: start by designing a class Card. The card should have two private fields, denomination (int) and ...
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| knowing cpu load information in java. | 12/29/2003 |
Q: can i write an application that is similar to resource meter in windows in java language.why means, ...
A: You cannot learn any of this information without using JNI. Java is not designed to monitor or ...
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| Online games site | 12/25/2003 |
Q: Online games site --- I want to make an online games web site similar to Yahoo! Games and MSN Games. ...
A: Wow your really asking for a lot. For most online gaming java applets are the way to go as they do ...
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| Cannot draw image | 12/18/2003 |
Q: I have the following lines in my program: Image image = ...
A: The toolkit creates the image, but it hasn't finished loading the image when you are drawing it. You ...
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| Java EditorPane class | 12/14/2003 |
Q: My school project is to write web browser in java. ALL is working fine for now, except one thing: I ...
A: Well not easily. The way that the api does it is by setting various attributes in the style sheet. ...
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| I am confused with file IO APIs in java.io.*, could you tell me a general principle when we shoudl use buffered or stream etc.? | 12/13/2003 |
Q: I am confused with file IO APIs in java.io.*, could you tell me a general principle when we shoudl ...
A: The stream you use depends on how you want to interpret or write the data. If you are using plain ...
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