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About Neal Ziring
(Top Expert on this page)

Expertise
Almost anything about the core Java platform, with an emphasis on networking. Not familiar with JDBC or the new Java graphics APIs. [Sun Certified Java Programmer, JDK 1.1]

Experience
Certified Java Programmer for JDK 1.1 and 2.0.

You are here: Experts > Computing/Technology > Focus on Java > Java

Questions Answered By Expert Neal Ziring
In Category Java

Subject	Date Asked

dictionary in java	11/14/2009
Q: i want to make a dictionary in java.can you give me a code? A: Shovon, > > i want to make a dictionary in java.can you give me a code? > I'm sorry, but your ...
Easy Counting Program?	11/14/2009
Q: Can you please tell me how to write the following program? I would greatly appreciate it! I dont ... A: Ryan, This is not a trivial program to write, especially if you want to be reasonably efficient ...
java	11/12/2009
Q: sir, Tell me how to save the output in textpad. for example, for(int i=0;i<9;i++) { ... A: Sri, > sir, > Tell me how to save the output in notepad. for example, > for(int i=0;i<9;i++) > ...
j2ee	11/12/2009
Q: I wrote dis program…its working fine but i want to store encrypted data in seperate .txt file and ... A: Sujatha, > i stored encrypted data in one file and i am decrypting dat file but it > giving error ...
Packet sniffing	10/31/2009
Q: I was testing my home network and I used a packet sniffer to capture packets on my network, but the ... A: Tony, It depends on what protocol was used for the encryption. I'm afraid you haven't given me ...
maze problem	10/30/2009
Q: I have read your instructions about finding the all paths in the maze at ... A: John, Actually, the link you gave was a response by Ziv Ben-Eliahu talking about how to extend my ...
calling c++ namespaces and objects from java	10/30/2009
Q: i need lot of help in JNI with c++.i have a source code for which i will have to make .so file and ... A: Sitaram, Okay, I understand what you are trying to do. Using JNI is not very hard, but it ...
j2ee	10/26/2009
Q: Please I need a a code of how to encrypt and decrypt files in Java with RSA algorithm. Thanks in ... A: Sujatha, There are several good examples available out on the web, and I'll list some for you ...
help required regarding java speech synthesizer	10/24/2009
Q: Sir i want to develop typing tutor for visually impared people fow this i want to build sound files ... A: Saba, The Java speech API (JSAPI) is standardized by the packages javax.speech, ...
java classes	9/26/2009
Q: if i have two different project in java [A.java] and [B.java] can i call A.java from B.java , if yes ... A: Ahmed, There are a couple of ways you can call Java program A from Java program B. 1. Call a ...
RMI concept in JAVA	9/26/2009
Q: Please give the line by line execution of RMI program in JAVA. I run the program in JDK1.6..I t ... A: VVV - First, you should probably look at the RMI tutorial, here: ...
arrays	9/25/2009
Q: What does new String[] do ? Is its purpose to initialize the array ? A: Binga, The expression new String[7] returns an array of seven object references, each ...
java	9/23/2009
Q: Sir, I am develop one window base application in java so I want to know that how to insert data ... A: Shukla, I think your problem is right here: ps.executeBatch(); The executeBatch() method only ...
Writing to a file:The Parsed out content from the file Using SAX Parser	9/22/2009
Q: xml file using a sax parser and getting is the exact output.Below is the code for that.the problem ... A: Ms. Ranjan, > the problem is I am not able to write it to file. I think the problem is being ...
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: Andres, > > I would like to write a photo website where a user could search for photos with ...
searching for a word	9/21/2009
Q: i have a database with two columns of string type.i have a text file with a set of words.i am ... A: Vatsala, Well, this is not very difficult, but you haven't given me all the information necessary ...
java	9/19/2009
Q: what is the defferense between struts 1.3 and struts2? A: Deeraj, Struts 2 changed a great many details of how you write Struts code. There is an excellent ...
Getting Oracle Apps Password using Java Script	9/17/2009
Q: I want to know if there is a way to execute a Unix command from Java script. In particular I want to ... A: Mrugesh, Yes, if your Java program is running on a Unix system, you can run a Unix command and use ...
Making dictionary application	9/14/2009
Q: I want to make the application of the Arabic-Indonesian dictionary, Where I have to start from in ... A: Damar, > > I want to make the application of the Arabic-Indonesian dictionary, > Where I have to ...
j2se	9/1/2009
Q: why we are writing java multithreading code inside the try block A: Pratap - > > why we are writing java multithreading code inside the try block? > Not all ...
call the class at the tomcat start	9/1/2009
Q: sir i have only one class Start public class Start extends HttpServlet { protected void ... A: Naval - If you want some code in your servlet class to be invoked when the server starts up, then ...
What do i need to learn in order to make Email Server in JAVA	8/22/2009
Q: I have selected my B.E. project as JAVA email server, which could send and receive emails along with ... A: Jay, This is a complicated question, because there are several meanings for the term "mail server". ...
changeListner for a recorder	8/21/2009
Q: Hope you will be fine.I have a recorder which record and play sound. I limit the record time to 3 ... A: Basit, You have asked a complicated question. Let's look at recording first. When your code is ...
cobol to java and back	8/20/2009
Q: I have a situation where I will be calling java from my cobol program and after doing some task in ... A: Suresh, > > Now, is there a way in java to intrepret the received string as the structure > above. ...
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: Jessica, I don't understand what you mean by "using ms dos". In the year 2009, I cannot believe ...
calling a function after every 10 min.	7/31/2009
Q: sir i have two class like class A and class B and from class A i want to call funB()inside of class ... A: Navalgupta, Calling a function every 10 minutes is not difficult. You can use the class ...
my java action class should call every 10 min automatically	7/30/2009
Q: sir, i have one java class (PushXMLInToURL.java) and i have one database table SMS_VENDOR and ... A: Naval, I think I sent you an answer just recently about how to call a method every 10 minutes. I ...
Using graph(chart2D) in Java application	7/29/2009
Q: I am trying to use Chart2D package in my application to draw graphs.I am specifically interested in ... A: Ms.Ranjan, I think that LLChart2D is automatically hiding the labels when it does not have ...
Genetrate XML file throughh Database table	7/28/2009
Q: sir, i have one database table and i want to create XML file whatever in the databse table. ... A: Naval, You can do all this in Java. First, you will need a JDBC driver that can talk to Oracle ...
INTERFACE	7/28/2009
Q: normally we can not create a object to interface,but i see one program that create object to ... A: Venkatesh, > normally we can not create a object to interface, but i see one program > that create ...
java looping	7/27/2009
Q: can you please give me an example on how will I create a program that will let the user enter a ... A: Nadja, This is not a difficult Java program, but the tricky part is actually reading the password. ...
Genetrate XML file throughh Database table	7/27/2009
Q: sir, i have one database table and i want to create XML file whatever in the databse table. A: Naval, > > i have one database table and i want to create XML file whatever in the database ...
software design	7/12/2009
Q: Is it POSSIBLE to design a database search (includes geographic) where the underlying source code ... A: Del, > Is it POSSIBLE to design a database search (includes > geographic) where the underlying ...
dictionary in java	7/6/2009
Q: how i can develop a dictionary software in java platform ?? A: Mohi, > > how i can develop a dictionary software in java platform? > The Java platform is large, ...
fingerprint SDK	7/1/2009
Q: I am lakshmi i want opensource finger print SDK in java A: Lakshmi, I do not know of any free, open source fingerprint recognition toolkits. There are some ...
Java-6-Update-14 not working on SeaMonkey 1.1.17	6/30/2009
Q: I have the latest version of SeaMonkey Internet Application Suite -- SeaMonkey 1.1.17 -- Mozilla/5.0 ... A: Green, It sounds like there is just a bug in the compatibility between SeaMonkey 1.1.17 and that ...
the question about SJCP exam	6/2/2009
Q: Thread Z holds the lock on object A.Thread X is blocked inside a wait call on object A. What allows ... A: Jack, Answers (A) and (C) are meant to look correct, but they aren't. (Actually, none of the ...
java	5/30/2009
Q: why we are writing thread code inside the try/catch block? A: Pratap, > > why we are writing thread code inside the try/catch block? > Yes, you have noticed ...
Java Swings	4/15/2009
Q: How to dynamically populate the values from the database into JComboBox. Thanks and Regards Vinod A: Vinod, > > How to dynamically populate the values from the database > into JComboBox. The ...
clear screen command prompt using java code	4/1/2009
Q: i want implement clear screen function in menu item ... when click on clear screen menu then command ... A: Krunal, > i want implement clear screen function in menu item ... > when click on clear screen menu ...
about java mail	3/26/2009
Q: how can i install javamail api into jdk1.5.0_11 for providing mail facility into my software. plz ... A: Idrish, You installed the jars into the wrong place. Given that your JDK and JRE are installed in ...
comparing 2 text files	3/26/2009
Q: Could you provide me with some examples and codes (links or tutorials)on how to compare 2 text ... A: Connie, Okay, if you want to write lines out to a file, that is very easy. Use some code like ...
about java mail	3/25/2009
Q: how can i install javamail api into jdk1.5.0_11 for providing mail facility into my software. plz ... A: Idrish, > > how can i install javamail api into jdk1.5.0_11 for > providing mail facility into my ...
Recognize image	3/24/2009
Q: I read your answer about how to get the pixel value from a specified image. I would like to ask if ... A: Kelvin, You're probably talking about my answer to "getting and storing in 1D array the pixel ...
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: Connie, Comparing two text files is a little tricky, but good algorithms for it have been known for ...
question on rmi	3/21/2009
Q: i have made one application using rmi.when i am trying to run server i am getting following ... A: Idrish, Well, the links I sent you explain the problem better than I can. But here are some more ...
thread priority	3/20/2009
Q: can you help me in the following please: I have server program to process different kind of ... A: O - > > In the first of my program I check the type of the request then > I start to process that ...
question on rmi	3/20/2009
Q: i have made one application using rmi.when i am trying to run server i am getting following ... A: Idrish, Okay, this problem is a fairly common issue. When you are running an RMI program that has ...
introduction to java	3/17/2009
Q: what is java swing package? A: Anish, Swing is a Graphical User Interface toolkit for Java. It provides the classes for all the ...
thread priority	3/16/2009
Q: can you help me in the following please: I have server program to process different kind of ... A: O - If your code is going to decide which requests to process and which to delay, then you do not ...
pixel values to notepad	3/16/2009
Q: Can we copy the pixel values obtained by reading an image into notepad....please help me A: Honey, > > Can we copy the pixel values obtained by reading an image into > Notepad? I'm not sure ...
audio comparision	3/10/2009
Q: I am capturing sound from microphone in wave format. i'd like to compare it with sample one. A: Nilsan, > > I am capturing sound from microphone in wave format. i'd > like to compare it with ...
Silent Installation for Java 1.6 U 7	3/9/2009
Q: I'm trying to write a bat file for corporate silent installs of Java Runtime Environment 1.6u7. So ... A: Phil, Using the JRE installer's /s option is the right way to do a silent installation. However, ...
interface nad abstract class	3/6/2009
Q: hai nz.. Why would some one want to create an abstract class ( a class that cannot be instantiated/ ... A: Tho_mee, > > Can you explain a little further on when we opt for > interface and when for abstract ...
Java Floats	3/6/2009
Q: Is there any way to increase the precision of decimal places that show in java? for example I need ... A: Jake, > Is there any way to increase the precision of > decimal places that show in java? Well, ...
interface nad abstract class	3/5/2009
Q: hai nz.. Why would some one want to create an abstract class ( a class that cannot be instantiated/ ... A: Tho - > Why would some one want to create an abstract class > (a class that cannot be ...
encryption and decryption using java	3/5/2009
Q: I want to encrpt the data using password.I have written the code for encrypting but i am not able to ... A: Vatsala, Okay, the main problem with your code is that you are storing bytes into a String object. ...
blocking an ip packet	3/4/2009
Q: Sir, I use jpcap to capture packets that pass through my network interface card. But I don't know ... A: Reuben, You can use Jpcap to grab packets, but it cannot block the packets. If you want to block ...
Need help on part of the code	3/2/2009
Q: I really am trying to write the code. It has been almost a week that I am working on this and I am ... A: Connie, Okay, I've looked over this code in more detail, and have found many mistakes and problems. ...
core_java	2/21/2009
Q: please tell about package path setting. A: J-L, Your question is a little vague. There are two aspects of "package path" setting. The ...
getting and storing in 1D array the pixel value of a gray scale image	2/20/2009
Q: I am new to Java, and want to know how to read and display a grayscale image and store it's pixel ... A: Sweta, > > I am new to Java, and want to know how to read and > display a grayscale image and ...
Java program can read Lotus Notes database file that is on a drive on the computer	2/19/2009
Q: I am looking for a Java program (xyz.java) that can read Lotus Notes database file (abcd.nsf) ... A: Sreeni, I do not know of any Java package that can read a Notes .nsf file directly. There are ...
Stack examples	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: Connie, > > I was wondering if you know some good links or examples on stacks? > There are many ...
can we see the code	2/11/2009
Q: hai Neal Sometimes this question might sound silly...But I just wanted to knw. I just wanted to ... A: Tho - Your question isn't silly, but it does have a simple answer. I think you gave up too early. ...
about import	2/11/2009
Q: while the java compiler compiles the code does it also check whether the class files are all present ... A: Tho, When the compiler is compiling, it checks for every class that you reference explicitly. The ...
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: Arul, > > When i am opening the web page, find firewall in the client > system whether firewall ...
english project on computer programming	2/10/2009
Q: iam doing a english paper on computer programmming and i would greatly appreciate if you were able ... A: Ljubomir, > > iam doing a english paper on computer programmming and i > would greatly appreciate ...
Fingerprint matching in java.	2/9/2009
Q: i wanted to know how can we match two finger prints(.bmp) taken from a finger print scanner so that ... A: Yogesh, Well, Java is not necessarily the best language in which to be doing biometric ...
Java - identify the position of the "NUMBER"	2/9/2009
Q: I wanna know how to identify the position of a given number. For example :- There are 3000 books. In ... A: Meenu, > I wanna know how to identify the position of a > given number. For example :- "There are ...
Efficient way to print in console	2/8/2009
Q: ...what is the most efficient way to print out in java console? is it system.out.println? thanks and ... A: Cris, Yes, the simplest way to print to the console is usually System.out.print() and ...
Java Class to File Name	2/6/2009
Q: if one source file has more than one classes, after compiling they are independant classes.so how do ... A: Nitesh, It is okay to put several classes into one Java source file, however, at most one of those ...
set method	2/5/2009
Q: This would be my last question I promise :) Again having in mind the following are my data members: ... A: Connie, The way your method is written, it returns immediately if the index given is greater than ...
TrimToSize() method	2/5/2009
Q: I am making an array of objects. I will not paste all my code, my methods are working except for ... A: Connie, Your code is not exactly wrong, but it is incomplete. First, remember that once a Java ...
NetSniffer	2/4/2009
Q: can any one send the project description and coding for the project on "Net Sniffer" A: Vishnupriya, Are you sure you've posted to the right web site? I do not know what the "Net ...
Identify numbers without using regular expression	2/4/2009
Q: I wanna know how to identify whether the given number is a single digit number or 2-digit number or ... A: Meenu, There are a few ways to do this. The simplest is to treat the number as an integer, and ...
java code to access router	2/3/2009
Q: Can u help me out with the java code to access cisco router. I am having the ip of the router. ... A: Shefali, > > The welcome message is diplayed on my prompt. But when it > goes for user-access ...
Java - regular expression	2/2/2009
Q: I wanna help from you.I need a code to identify the number in a given input sentence using regular ... A: Meenakshipanigrahi, Okay, your code is almost correct. You need to count the number of number ...
I need help urgently...Pls!!!	1/28/2009
Q: How to write a program which takes a sentence(i.e. string) as input, and prints out various ... A: Dammie, You have several separate problems here. P1. Split a sentence into words. P2. Test whether ...
zooming function in 3d java	1/28/2009
Q: My task is to implement zoom in and zoom out function in 3d java on a shere.I have absolutely no ... A: Rucha, I'm no expert on Java3D, but zooming is not very difficult. In your scene graph, you will ...
Java Error	1/26/2009
Q: A Java Error occurs frequently for me, and this is what it reads: ... A: Josh, Based on that example, it looks like the Java Plugin (the applet framework for Java2) is ...
java code to access router	1/25/2009
Q: Can u help me out with the java code to access cisco router. I am having the ip of the router. ... A: Shefali, > > Please help me with the code. > I am a beginner in java. > I'm sorry, but this is not ...
chat program	1/24/2009
Q: Create a Chat Program . (eg Google Chat ) With the following option … 1. Option to Sign Up – ... A: Suhas, Writing a chat program in Java is not very difficult, but it will mean you'll have to learn ...
Java Script for Lotus Domino 6.5	1/21/2009
Q: I am looking for a java script for lotus domino 6.5 which will delete all mails from mail databases ... A: Gaurav, I cannot give you such a script, because I do not have access to Lotus Domino myself. If ...
java	1/19/2009
Q: My application is real time and i need to connect to the server for this. Then i need to get router ... A: Shefali, > I have 2 connect to a cisco router using ssh protocol. I > have to obtain router ...
java	1/18/2009
Q: My application is real time and i need to connect to the server for this. Then i need to get router ... A: Shefali, Your question has several parts. > My application is real time and i need to connect > ...
selection statement in java	1/17/2009
Q: please help me with this. included here is the code i made to run a program about learning data ... A: Dimples, Your source code was cut off in the middle of Case 1, so I cannot see all of your ...
text,txt	1/15/2009
Q: Im Developing an application that reads product id, product name and product price from an input ... A: Beau, Well, you haven't really asked as specific question. I'll just give you some hints about how ...
J2ME text to speech	12/29/2008
Q: Is there a J2ME speech API for converting text to speech? If so, I m using Java(TM) ME platform SDK ... A: Siddarth, There is a standard Java API for speech handling (both output and input), the Java Speech ...
Runtime.getRuntime().exec ,send input and get output	12/20/2008
Q: i already read this ... A: John, It sounds like you want to start a cmd.exe process, and then feed it commands and capture the ...
Reg : Image Encryption & Decryption	12/19/2008
Q: I've implemented the code to encrypt image as follows by following the link : ... A: Yasmin, > > If I opened the file "output.jpg", I got message > as "No preview available." Yes, ...
CustomTableHeader	12/19/2008
Q: .. you previously gave me a sample on putting a class that extends as jcheckbox and implements ... A: Madzmar, > > i would like to ask how can i enable my checkbox in the > table header... you ...
core java	12/16/2008
Q: package mypack; class Balance { string name; double bal; Balance(String n,double b) { name=n; ... A: Pratap, To compile this program, you must first install the Java 2 Standard Edition Java ...
Core Java	12/16/2008
Q: What is Aggregation in Java? A: Pratik, Aggregation is the practice of collecting several objects under one object. For example, ...
core java	12/14/2008
Q: package mypack; class Balance { string name; double bal; Balance(String n,double b) { name=n; ... A: Pratap, Your code has several problems, which I'll describe below. You do not need the CLASSPATH ...
core java	12/14/2008
Q: package pack; class mypack { public static void main(String args[]) { Console.writeline(" my ... A: Pratap, You do not need to use the package statement. Simple programs do not need to be in a ...
object vector	12/13/2008
Q: Can you help me please , I identified vector to store received object from client and I have to ... A: I - The structure of your code is basically correct. You should not get an out of bounds array ...
Core Java and Java ME	12/11/2008
Q: Sir, I'm a beginner in Java. I want to know whether there is any difference between Core Java and ... A: Shreyasi, > I want to know whether there is any difference between > Core Java and Java ME.If so ...
Checkbox tableheader	12/6/2008
Q: .. i would like to ask something about JTable... how can i put a checkbox in a tableheader??? hope ... A: Madzmar, To put a checkbox into a JTable's header, you need to set a custom header renderer on the ...
error	12/5/2008
Q: why error comes jvm_bind..any solution to it..thank u in advance A: Gajendra, > > why error comes jvm_bind > This error happens when you try to open a Socket or ...
hai	12/5/2008
Q: hai nz my question now is what is the difference between jdk and jre? when java was installed in my ... A: Tho - > > if i want to use a new java API, it will be having some > jar files associated with ...
hai	12/4/2008
Q: hai nz my question now is what is the difference between jdk and jre? when java was installed in my ... A: Tho - JRE stands for Java Runtime Environment The JRE consists of the JVM plus various libraries ...
All About JTable	12/4/2008
Q: .. i would like to ask something about the jtable and if that is possible... 1. im making a ... A: Madzmar, Well, the jxl API documentation for version 2.6 seems to indicate that it can handled ...
something basic	12/3/2008
Q: i am now learning java. My question is : Is JVM operating system specific(one JVM foe Win another ... A: Tho - > > Again powerPC processor if it runs a windows or a linux OS, > the Win + PowerPC will hav ...
something basic	12/2/2008
Q: i am now learning java. My question is : Is JVM operating system specific(one JVM foe Win another ... A: Tho - The JVM is always operating-system specific. You have to have one for Windows, one for ...
Java Download Failed	12/1/2008
Q: I have been trying to download Java and it will not download. Every time I try it comes up with ... A: Tanya, That's tricky. I don't know why the download would fail each time; perhaps it is a problem ...
static method polymorphism?	11/29/2008
Q: I wonder if the static methods can be overide/overload (polymorphism)? Thanks, lzzzz A: Izzzz - > > I wonder if the static methods can be > overide/overload (polymorphism)? Somewhat. ...
Desktop Screen Sharing	11/26/2008
Q: I've been working on a desktop screen sharing application and am having a bit of trouble with speed. ... A: Steve, Well, you shouldn't just assume that a particular part of the program is causing poor ...
how to retrive mails uisng java	11/24/2008
Q: how to retrive mails using java??? for example: ----------------- class Mail{ private String ... A: Bala, > how to retrieve mails using java??? If you want to retrieve e-mail from a ...
Java Random Array Numbers Ascending	11/23/2008
Q: Under is what i have so far. What I am trying to do make a program that asks the user how many ... A: Johnathan, > > I am trying to do make a program that asks the user how many > random numbers they ...
java runtime environment	11/23/2008
Q: I have recently downloaded Secunia PSI(RC4) on the recommendation of several tech experts to check ... A: Rae - [You didn't say which OS you are running, so I'm going to assume Windows XP. Most of the ...
Another Question, help please?	11/8/2008
Q: It's me again. Hope you can help me again. The code that day i provided, i already modified it. It ... A: Isaac, Printing a text file from Java will require two things: reading the text file using a ...
creating classes	11/8/2008
Q: I'm learning about creating and i don't have a good grasp of when you should create a class and ... A: Jeremy, It is difficult to grasp the distinction between classes and objects (class instances) when ...
print information not found in array	11/7/2008
Q: Greeting, Sir, can you please help me in this algorithm, i want to print out all the string ... A: Carlo, Unfortunately, your algorithm is not quite right. The loops are basically right, but the way ...
Hello,..can u help with my java code?	11/6/2008
Q: how are you? I hope that u could help me with my JAVA code,...the problem is, i dont know how to ... A: Isaac, Wow, this code is a mess. It has many problems, it would take hours for me to find and ...
JAVA Concepts	11/6/2008
Q: Neal Ziring I've three questions. Kindly answer these. 1. Why we use enableEvents() method? 2. Can ... A: Sofia, > > 1. Why we use enableEvents() method? The enableEvents(long mask) method of ...
bootable program	11/5/2008
Q: hi could i make a Java program that boot or work with out operating system if yes then how ? A: Alias, > > could i make a Java program that boot or work without > operating system if yes then ...
java	11/5/2008
Q: i have package (c:\t2\test.java) outside jdk.how can i run this package. javac exists at this path ... A: Yasotha, To run the Java application package, you'll need to compile the code using the Java ...
converting Image to bytes	11/4/2008
Q: I want to convert an Image or BufferedImage into byte[] or some other form so that I can send it ... A: John, There are a couple of ways to convert an Image into an array of bytes. Which one works best ...
array	11/3/2008
Q: /*INPUT TWO STRING ARRAYS AND SORT THEM i need to accept two arrays as parameters and sort them only ... A: Jot, It seems that you have two problems here: 1. Getting as input parameters two arrays of ...
java	10/31/2008
Q: is java is pure object oriented programming langauge? A: Sandeep, Java is not considered a pure object oriented language. In such a language, ALL data items ...
RSA java file encryption/ decryption	10/24/2008
Q: Please I need a a code of how to encrypt and decrypt files in Java with RSA algorithm. Thanks A: F - Well, you'll first want to learn about the Java Cryptography Extension in general. There is a ...
.exe files	10/20/2008
Q: Please can you tell me how I can make a Java project to an .exe file with setup wizard in Fedora ... A: FJ - > > Please can you tell me how I can make a Java project to > an .exe file with setup wizard ...
java	10/8/2008
Q: How can I write a program that converts decimal to binary? A: Abdalla, > > How can I write a program that converts decimal to binary? > Java offers a couple of ...
Toolkit.getDefaultToolkit().getLockingKeyState() error in ubuntu.	10/7/2008
Q: . gud day to you sir., by the way i got this error everytime i run my project in ubuntu.. ... A: Alexis, Yes, I get this problem on Ubuntu also, UnsupportedOperationException. This is a bug in ...
Loading Images	10/6/2008
Q: can i load the swf file? A: Albar, > > can i load the swf file? A .swf file is an Adobe Shockwave Flash graphics animation. It ...
how to add hyperlink in a table cell to open a jdailog	10/3/2008
Q: how to add hyperlink in a table cell to open a jdailog. jdialog should open when we click on ... A: Venkat, > > how to add hyperlink in a table cell to open a JDialog. > JDialog should open when we ...
loading images in java	10/3/2008
Q: Neal Probably the subject says it all. How can I load a .JPEG image in java?? Just the simplest ... A: John, > > How can I load a .JPEG image in java? The simplest way is to use the java.awt.Toolkit ...
display text in textarea	10/2/2008
Q: i want to retrieve value from database and display it with text area.i have created the following ... A: Chitra, Okay, your exception is telling you that you have asked for a field of the ResultSet that ...
retrive values from database and display it in textarea	10/1/2008
Q: in swing,retrieve values from database and display it in textarea..and i want to display the data in ... A: Chitra, > > in swing,retrieve values from database and display it in textarea. > This is very ...
how to add header to the table	9/29/2008
Q: private void dviewallmenuitemActionPerformed(java.awt.event.ActionEvent evt) { ... A: Chitra, > > i want to add button to the frame..i have created > the following coding.but it does ...
how to add header to the table	9/29/2008
Q: private void dviewallmenuitemActionPerformed(java.awt.event.ActionEvent evt) { ... A: Chitra, > > i want to focus next text field by pressing enter key. > Yes, I see where you are ...
how to add header to the table	9/27/2008
Q: private void dviewallmenuitemActionPerformed(java.awt.event.ActionEvent evt) { ... A: Chitra, Well, this code cannot possibly work as you've written it. The code contains many errors. ...
How to use Toolkit.getdefaultToolkit().getLockingKeyState()	9/26/2008
Q: im developing a application composed of a jframe with a jxStatusbar. inside a jxstatusbar i put 3 ... A: Alexis, Keeping that state is not easy. You can do it, but you'll need to set an event handler on ...
java (for each loop)	9/26/2008
Q: i hav studied abt the "for loop" in java and there is also a "for each loop " i saw in book can u ... A: Ansh, The "for each" loop is used to iterate over all the elements of a Collection. It only works ...
file concept	9/24/2008
Q: How to append the content to a file with out truncating the content using java code. A: Naganathan, > > How to append the content to a file with out truncating > the content using java ...
event handling	9/19/2008
Q: in swing programming,after entering data in one text field,how to focus next text field by pressing ... A: Chitra, > > in swing programming,after entering data in one text field, > how to focus next text ...
saving an image??????	9/18/2008
Q: i have a image object in an applet window. like Image i=getImage(getCodeBase(),fd.getFile()); ... A: Anand, > > Now i want to save this Image "i".... > To save an Image object, you must use the ...
ComboBox problem	9/17/2008
Q: The JComboBox control in the code becomes invisible. Is there any mechanism to show that control? ... A: Padel, The problem with this program is that you are trying to use a Swing component (JComboBox) in ...
pixel data readback from framebuffer	9/17/2008
Q: Currently I am working in one of the game project in which I need to readback the contents of the ... A: Hariprasad, > > Currently I am working in one of the game project in which > I need to readback ...
set CLASSPATH and packages	8/25/2008
Q: Neal i'm learning about packages in java i dont get the purpose of set CLASSPATH what is its ... A: John, > > i'm learning about packages in java Good, packages are quite important for any large ...
Opening and managing 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: Solomon, > > I am wondering is there any command or algorithm to > open .AVI or any other not txt ...
Java warning message	8/23/2008
Q: I wonder who can help me? or give me some advice. I have similar similar as Alan. I am a computer ... A: Phoebe, The warning messages you've seen have nothing to do with Java. The download software that ...
JAVA HELP !!!!	8/22/2008
Q: JAVA PLEASE !!!! i have student data in the file as u can see below Johnson 85 83 77 91 76 ... A: Putri, This is not a very hard program, but there will be several pieces you need to learn. First, ...
Voice changer in Java	8/20/2008
Q: Sir, I want to make a software which takes a human voice as input and read its attributes and stores ... A: Prateek, > > I further want to know how far FFT library will help achieving > my objective. Are ...
Voice changer in Java	8/17/2008
Q: Sir, I want to make a software which takes a human voice as input and read its attributes and stores ... A: Prateek, Wow, that is an extremely difficult project. You can read an overview of how hard this is ...
Writing to socket and getting response on same socket asynchronously	8/15/2008
Q: Single socket is there to write and receiving asynchronous response.We can send about 10 write ... A: Durga, > Single socket is there to write and receiving > asynchronous response. Yes. The usual ...
Pop-up window alignment	8/14/2008
Q: I recently set up a page so that links open in a seperate window, and resized the new window to fit ... A: Daniel, If you are using the Javascript window.open() method to create your new window, you can use ...
Connecting MsAccess DataBase	8/13/2008
Q: Sir, Is there exist aType4JDBC driver for connecting MsAccess. How to access the constraints ... A: Nimitha, > Does there exist aType4JDBC driver for connecting MsAccess. > There are a few companies ...
reading in a single char in java	8/13/2008
Q: Neal I just want to know how to read a single char from the keyboard in java thanks A: John, You can read a single byte from the console using the System.in InputStream. The code would ...
code over image	8/10/2008
Q: http://www.guitarmemories.com/antipasti/expired/ how can i have word expired go on top of ... A: Marv, Well, this isn't really a Java question, it is more of an HTML question. I'll try to answer, ...
Encrypt Image FIle	8/5/2008
Q: I let users to open any Image File. Now I want to open that image file and encrypt it and save it at ... A: Nirav, It is not very difficult to write out a BufferedImage object using the javax.imageio ...
java warning message	8/2/2008
Q: Neal I use the LinkedList class from java.util.* package in order to create a list of objects but ... A: John, > but when i compile, i get a warning message that goes > like "unchecked call to add(E) as ...
Question	7/30/2008
Q: it really helped.I also wanted to know that since there are a lot many versions of JAVA in the ... A: Priyanka, There is a test for Java 1.4, 5, and 6. Right now, 5 is probably in widest use. You ...
file IO in java	7/30/2008
Q: Neal what is the most common way of reading a file (.txt file) and writing to a file in java?? ... A: John, > > what is the most common way of reading a > file (.txt file) and writing to a file in ...
Java Programming	7/27/2008
Q: List 4 types of inner class. What is inheritance? Which keyword is used with the loop to immediate ... A: Phyo, > > List 4 types of inner class. > Java supports four types of inner classes, also called ...
exiting in java	7/25/2008
Q: Neal I've written a try catch block of code if the catch executes, I want the program to terminate ... A: John, If you want to exit a Java program immediately, there is a method on the System class to let ...
writing a program with Applet	7/23/2008
Q: I want to know how to write a program with applet to select two co-ordinates (one with mouse pressed ... A: Kalpa, It is not very difficult to write a Java applet that accepts mouse events and draws lines. ...
query	7/22/2008
Q: i wish to give the SCJP exam.I had taken a course for core and advanced java two years back.I do not ... A: Priyanka, I think you can take the Java SCJP exam after one month of study, but only if you have ...
deep copy with serialization	7/21/2008
Q: I have a private field in type Object,and am trying to make a deep copy of it to another object that ... A: Hatem, Making deep copies of objects using ObjectInputStream and ObjectOutputStream is a good Java ...
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: JSmith - Well, this isn't especially hard, but it is a little tricky to keep track of the cases ...
Java strongly typed ??!!	7/18/2008
Q: I'm just wonderin what does it mean that "Java is strongly typed".. I tried lookin it up but I'm ... A: Munther, The description "strongly typed" is very difficult to pin down. Even computer science ...
java program	7/16/2008
Q: given a hexadecimal number as input convert this number to its decimal equivalent A: Mykel, > given a hexadecimal number as input convert this > number to its decimal equivalent The ...
Core java and String Tokenizer	7/14/2008
Q: I am preparing for java certification in one of the materials that i study i have this question... ... A: Ms. Ranjan, The correct answer is (B). The && operator checks the value of the left operand, and ...
Core java(visibility of classes)	6/24/2008
Q: Protected visibility- A variable or method declared protected can be used only by classes in the ... A: Ms. Ranjan, The keywords "protected" and "private" can be used with classes, but ONLY with certain ...
JAVA	6/9/2008
Q: First of all for giving this wonderful services you are the creator of my destiny Thank you I am ... A: Shukla, The Java Speech API home page is here: http://java.sun.com/products/java-media/speech/ ...
Saving entries in java	6/5/2008
Q: How can u save the results or the entries u enter in a java program. i am a beginner in java i want ... A: Mahiou, > > How can u save the results or the entries u enter in a java program? In general, a ...
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: Petar, > it shows me the message "Applet Notinited" and doesn't > load the applet! First, you ...
Programming (Java)	6/3/2008
Q: !! I did this program below, and I need some help to comment the program. I started but I can't go ... A: Antonio, This is not a Java program, it is a C# program. I'm not a very good C# programmer, since ...
Java Package	5/31/2008
Q: Sir, I would like to know regaring the package concept in java.Would u please prive me the tutorial ... A: Samujeet, Many good Java instructions and tutorials exist on the Web, including ones about ...
Multiple Inheritance in Java	5/28/2008
Q: All java classes, by default, extend Object class. public class ABC is equivalent to public class ... A: Preeyanka, Java does not have multiple inheritance for classes. Consider these two declarations: ...
deletion of folder	5/27/2008
Q: i am working on a project where i have to delete the folder after 7 days.can you please tell me a ... A: Swati, Java provides a class that will do most of what you need: java.io.File. It allows you to ...
New to Java	5/20/2008
Q: In September I will begin a degree in IT with a focus on Software Systems. I have no background in ... A: Julian, > 1. Before I begin "formal study" I thought it would be a good > idea to learn a little ...
ProblemSaveWithLinkedList	5/19/2008
Q: First,..Sorry if my English is Bad..hehehe.. i have a problem.. I have tried to save LinkedList to ... A: AzadiDicky, To really know the problem, you must print the exception. Change ...
JAVA	5/4/2008
Q: I am shukle parnash from Gujarat in India. I am student of MCA(Master In Computer Application) I am ... A: Shukla, If you want to set the stars in jTextArea2, you must assemble them as a String, then call ...
PROBLEM	5/3/2008
Q: I HAVE NO IDEA ABOUT THE FOLLOWING:- HOW TO PERFORM MATRIX ADDITION USING 1 ... A: Sourbah, > HOW TO PERFORM MATRIX ADDITION USING > 1 DIMENSIONAL , 2 DIMENSIONAL , 3 ...
about java	5/3/2008
Q: I am using Window vista. i have a simple java program that needs to be compiled and run from the cmd ... A: Mohamed, The procedures and settings for Vista are pretty much the same as for XP. If you look at ...
BaseDAO	5/1/2008
Q: I saw the following syntax, is it a java Generic or UML? Thanks,lzzzz BaseDAO <B extends ... A: Izzzz - Yes, this syntax is a specialized form of Java generic. It usually appears as part of a ...
Use of multi dimensional arrays and exption handling	4/17/2008
Q: This is a question i waz given by my computer science lecture and i dont have an idea how to ... A: Ayanda, This problem is not especially hard, but it will require quite a bit of coding. It is not ...
question	4/16/2008
Q: What is Annotation in java A: Ashok, Java Annotations are a general purpose metadata facility for adding mark-up or extra ...
JAVA	3/19/2008
Q: I am shukle parnash from Gujarat in India. I am student of MCA(Master In Computer Application) I am ... A: Parnash, > > I want to open the text file in notepad or in text pad > in java It is possible to ...
JavaRMI	3/19/2008
Q: hye, i am doing the chat program using the Java RMI. i am using the Hamsam API for the clientside ... A: Lieza, > > i got so many chat program example fronm the Internet, but > somehow in the Java RMI ...
JavaRMI	3/18/2008
Q: hye, i am doing the chat program using the Java RMI. i am using the Hamsam API for the clientside ... A: Lieza, > i am doing the chat program using the Java RMI. Okay, RMI is a reasonable Java network ...
cheating on my homework	3/18/2008
Q: Neal, My name is Marty Stepp. I am a computer science instructor at the University of Washington. ... A: Marty, That's okay, don't worry about it. Anyway, I got a note from AllExperts.com tech support ...
java	3/17/2008
Q: I am using Itext to constructa pdf file in java..And I have to put some bullets in my pdf for that I ... A: Mayank, I don't see why it should fail, perhaps there is a bug in iText's implementation of ...
Question on Lines of code counting	3/15/2008
Q: I have to create a report that would provide number of lines of code in our project. I could find a ... A: Deepthi, It is certainly possible to open Jar files and inspect their contents from a Java program. ...
Event Listeners	3/15/2008
Q: Can listeners only be associated with GUI components?. I'm trying to create a listener to listen for ... A: Erik, > > Can listeners only be associated with GUI components? > No, there are many kinds of ...
java	3/14/2008
Q: I am using Itext to constructa pdf file in java..And I have to put some bullets in my pdf for that I ... A: Mayank, As far as I can see, you have only one mistake in this code: List list = new ...
source code	3/13/2008
Q: .. I am doing the project on "Budget approval system". Plz send me the source code for my ... A: Bharath, If you mean the "Budget Approval System" described here: ...
Java and pogo	3/12/2008
Q: I am having a big problem...it started with just a few games in pogo, telling me that the java ... A: Yvonne, It is possible that you still have some corrupted Pogo applets in your Temporary Internet ...
question in java	3/11/2008
Q: write a program to input a no.if no. is 5 digit then checkout how many times middle digit is ... A: Shivam, > write a program to input a no.if no. is 5 digit then > checkout how many times middle ...
Share data on a web page?	3/10/2008
Q: I call prospects and qualify them on the phone then pass them along to my client, a debt settlement ... A: Michael, > I have a small call center. I call prospects and qualify > them on the phone then pass ...
Client-server backup	3/5/2008
Q: I want to perform backup from client to server. How it is possible? A: Samip, > > I want to perform backup from client to server. How it is possible? > Well, you could ...
RMI servlets	3/4/2008
Q: To run the Servlets program which version of JAVA should I have installed? A: Kalaivani, > > To run the Servlets program which version of JAVA should I > have installed? A ...
Lotus Notes session	3/4/2008
Q: Im writing app that connect to Lotus Notes database and retrieves some data.This database is ... A: Zybnek, > I protect it by filling in encrypted database file which is > encrypted to my ID.But for ...
Saving java source file	3/2/2008
Q: When we have a public class in java program we have to save the source file with the same class name ... A: Supratim, > When we have a public class in java program we have to > save the source file with the ...
Lotus Notes session	3/2/2008
Q: Im writing app that connect to Lotus Notes database and retrieves some data.This database is ... A: Zbynek, > Is there any way to use session established by Lotus > Notes app? Because so far user ...
J2EE	2/28/2008
Q: How can i create combo box in JSP page? How can i get value of combo box in servlet? A: Samip, > > How can i create combo box in JSP page? > JSP doesn't directly provide support for ...
To get a week number from date	2/28/2008
Q: i have a date in MM/dd/yyyy format. I also know the number of weeks in that month. How can i find in ... A: Frank, This is related to the other question I answered for you, and uses all the same classes. ...
First day of a month	2/26/2008
Q: i have got a date(MM/dd/yyyy) and i need to know the starting day(monday,tuesday,etc.,) of the ... A: Frank, > i have got a date(MM/dd/yyyy) and i need to know the > starting day(monday,tuesday,etc.,) ...
help with java	2/25/2008
Q: i am a java student but i cant sort string in java, can someone help me with this? A: Julia, > > I am a java student but I can't sort string in Java > Yes, you can sort Strings in ...
BufferedReader	2/25/2008
Q: I want to append data to an already existing file. I tried using BufferedReader but null values are ... A: Keerthi, > > I want to append data to an already existing file. > If you want to append data to a ...
accessing non-static data in static methods	2/22/2008
Q: I need to access non-static data, as soon as it is initialized in static methods - in a ... A: Gayatri, > > I need to access non-static data, as soon as it is initialized > in static methods - ...
Plugin	2/22/2008
Q: DUDE!!!! i'm getting a little mad setting here looking at one of my favroit games i can't play. it ... A: Johnny, I don't know why your web browser would shut down when you visit the Sun web site. Perhaps ...
Plugin	2/20/2008
Q: DUDE!!!! i'm getting a little mad setting here looking at one of my favroit games i can't play. it ... A: Johnny, Yes, this problem appears to come up frequently on the Runescape message boards. You need ...
Cron job	2/19/2008
Q: Sir i created a shell like this to_day=`date\|awk '{print $1$2$3}'` echo $to_day log_time=`last\|awk ... A: Shinil, From your description, it sounds like the Java program is not running. If you are just ...
Code won't compile	2/18/2008
Q: This below is my code but when i try to compile it, it says } is expected on the line where i have ... A: Catia, > This below is my code but when i try to compile it, it > says } is expected on the line ...
problems downloading java	2/18/2008
Q: i have been trying to install java and it won't let me. when i do it offline it says-error applying ... A: Stacy, Installing Java on Windows can sometimes be painful, especially if you do not have ...
Trying to write Two port Server	2/16/2008
Q: I want to write two port server socket program using Java, (i.e. single server program which is ... A: Syed, First, a note about sockets: You can open multiple ServerSockets in a Java program, and ...
Java Button Linking help	2/14/2008
Q: i need some help with a java menu program... now I'm not that great at Java but I am getting the ... A: Michael, You have the right idea, you just need to understand how to distinguish between different ...
java	2/14/2008
Q: why pointers are not used in java ANSWER: Neerajah, > > Why pointers are not used in java? > If a ... A: Neerajah, > > i want to know about arrays and keywords used in java > ARRAYS: A Java array is ...
java	2/13/2008
Q: why pointers are not used in java A: Neerajah, > > Why pointers are not used in java? > If a language supports pointers, then it gives ...
encryption	2/12/2008
Q: well, I got error when I start to decrypt it, starting with the main class "mob.DownMultiPUCP", so, ... A: Alex, Sorry, but I don't know what could have gone wrong. It is possible that your decryption ...
connect to a host machine on lan	2/12/2008
Q: Within a java program I wanted to connect to a host machine running linux so that i can execute some ... A: Samod, > > Within a java program I wanted to connect to a host machine > running linux so that i ...
Java	2/11/2008
Q: I am doing project in Java(especially using Swing, Hashmap,ArrayList,JTree,database connections)...I ... A: Sureka, > > I don't know to trace out the exact information what i need. > Yes, that can be very ...
encrypt, decrypt...JAR...	2/11/2008
Q: my last question, I want to try to obfuscate with yGuard, but I have problems I dont know how to ... A: Alex, > > I make a list of all my classes, and then make the Url of > the main() one, all i got ...
encrypt, decrypt...JAR...	2/9/2008
Q: my last question, I want to try to obfuscate with yGuard, but I have problems I dont know how to ... A: Alex, > > I know how to encrypt a single java class, and I think that > I encrypt all the classes ...
Runtime.getRuntime().exec(	2/8/2008
Q: I am opening command prompt using Runtime.getRuntime().exec("cmd.exe /c start") Now how do i ... A: Payal, > > Actually I want to run simultaneously many commands in > command prompt and get the ...
viewing fonts in Vista	2/8/2008
Q: I do not know who I should be asking this question of, If it not you please guide me to the correct ... A: Paul, Well, I don't know of any script that will do this job for you. There are many programs that ...
Runtime.getRuntime().exec("cmd.exe /c start")	2/7/2008
Q: I am opening command prompt using Runtime.getRuntime().exec("cmd.exe /c start") Now how do i ... A: Payal, > > I am opening command prompt using > Runtime.getRuntime().exec("cmd.exe /c start") > > ...
yguard XML doubt...	2/7/2008
Q: my last question, I want to try to obfuscate with yGuard, but I have problems I dont know how to ... A: Alex, Obfuscating your classes is a good thing to do. YGuard is not a great obfuscator, but it is ...
java	2/6/2008
Q: I am Parnash.I want to know that How to Sorting String in java. example Input := def ghi abc ... A: Parnash, Java provides several different facilities for sorting data objects. They all depend on ...
JAVA	2/6/2008
Q: I am Nilesh. I am stduent of MCA in Gujarat in India. I am developing one multimedia application in ... A: Nilesh, First, I would caution you not to use the MS-Access database to store any serious data. It ...
Advice on Rational Tool & Development	2/5/2008
Q: Here's the scoop, I have just been plopped down to support some JAVA apps that were created and ... A: Scott, You have my sympathy; maintaining a load of somebody else's code is no picnic. Anyway, if ...
Java encryption	2/5/2008
Q: How are you, I would like to know how can a protect a Java Code in JAR, JRE 6. I was trying to ... A: Alex, Well, protecting your Java code is not easy. Obfuscation is one good technology; if you are ...
Concurring Java error	2/4/2008
Q: When I run my java application this error keeps coming up when trying to log in. Your help would be ... A: John, Well, I don't have the entire system available to look at, so I'll give you my best guess. ...
java programming	2/3/2008
Q: Write a program that reads in a four-digit number(such) as 1998) and outputs the number, one digit ... A: Mashia, Well, this is pretty easy to do in Java. The hardest part is actually reading in the ...
JAVA	2/2/2008
Q: Can u tell me something about JVM metrics visualizer System A: Diana, I'm sorry, but I don't know about much about visualizing JVM metrics. There are many ...
URLConnection for google search doesn't work	1/31/2008
Q: Resp sir, i cannot read the content while i am connecting with google search ... A: Sureshkumar, The URLConnection class is the correct class to use to get HTTP content. However, ...
Connect JTree with Database	1/30/2008
Q: I'm working with Swing.I have to construct a SplitPane with JTree on the leftside and its details ... A: Priya, Connecting with databases from Java requires using the Java Database Connectivity package ...
JTree Updation of Nodes	1/30/2008
Q: I have a problem in JTree.I can insert or remove nodes dynamically to tree. Nodes are added or ... A: Priya, Your code can add nodes to a JTree, but unless you add extra code to write the Tree data out ...
java	1/24/2008
Q: Pl give me a java program to find the number of days between the given dates. A: Umarani, To compute a difference between two dates, you need several capabilities: 1. The ...
Renaming list of files	1/23/2008
Q: I would like to write program to change files name. Write now I have written program to list the ... A: Lucks, Renaming files is pretty easy, but you need to use the java.io.File object. When you ...
question regarding arraylist in java	1/22/2008
Q: wants a program to take firstname,lastname,Dateofbirth in to a file and sort the firstname in the ... A: Hemalatha, Well, there a several ways to write such program. I would recommend creating a small ...
java beans	1/19/2008
Q: can you pl guide me to write and excute a simple java beans program? Also can you pl give me a JSP ... A: Umarani, > > can you pl guide me to write and execute a > simple java beans program Well, Java ...
What should we come up with in the high level design and low level design?	1/18/2008
Q: What should we come up with in the high level design and low level design? Thanks lzzzz A: Izzzz - Exactly what goes into a high-level or low-level design will depend on what design ...
IRC Connecting	1/17/2008
Q: Are there any Java applets, preferably open source, which connect to an IRC server? A: Jeff, Yes, there are several applets out there for IRC. Some of them are open source, but most are ...
What should we test on the unit test?	1/15/2008
Q: What should we test on the unit test? Thanks lzzzz A: Izzzz - Unit testing should be built around or into every class of a production system, library, or ...
java	1/14/2008
Q: write a programe in java to find the reverse contents of array. array size is 3. A: Qaiser - I'm not sure I understand your question. Reversing an array is very easy, but you need to ...
cloning	12/28/2007
Q: can classes be clonned? A: Sahan, Classes cannot be cloned. The clone operation is only applicable to objects that are ...
Java Error.	12/20/2007
Q: First let me say how great it is for you to help me. This is my error: Starting Uberscape on ... A: Carl, I'm having a hard time understanding what you are trying to do. I tried to go to Uberscape, ...
Doubts regarding creating an application	12/19/2007
Q: I am trying to create an application using java where i can search for files and folders in my local ... A: Aasia, Java can be used to create an application for searching for files and folders. However, it ...
A*	12/15/2007
Q: i am wondering how to use A* algorithm in my last code, since i read in A* using queue function too, ... A: Fendi, You can employ the A* algorithm for the puzzle game or many other kinds of multi-move search ...
Java	12/13/2007
Q: What is the difference between Class method and Object method? Give some example also? A: Ramakrishna, > > What is the difference between Class method and > Object method? Give some ...
i want to be good at technical and logical in java	12/13/2007
Q: This is Rajesh,can you please guide me to become a good programmer in java. In clear my ... A: Rajesh, There are four things you need to do in order to become good at Java coding: 1. Read and ...
animation	12/11/2007
Q: in my last code, i put method to print the solution, but how to make the animation works? i make ... A: Fendi, Running this kind of animation with Swing is somewhat tricky. The way Swing handles ...
regarding socket pgming in java	12/11/2007
Q: sir,i have already made successful program to communicate between one client and one server.i want ... A: Munawer, A Java server program should always be written to support multiple clients. Exactly how ...
animation	12/9/2007
Q: in my last code, i put method to print the solution, but how to make the animation works? i make ... A: Fendi, The code in your search() method prints to the System.out stream. That won't really help ...
BFS	12/2/2007
Q: last time i have below code for puzzle using dfs and idfs, now i want to try using bfs, can u give ... A: Fendi, > can u explain your code, what the function of class > QEntry? and why u're using 'static ...
JVM setting for Arabic language	12/2/2007
Q: Sir, System Specifications: 1.AppServer - Pramati4.1 2. DataBaseServer - MSSql 2005 3. Windows ... A: Jitendra, There are a couple of reasons why this might happen, but the most likely is that the ...
bfs-Animation	12/1/2007
Q: i last code i did the dfs and idfs to solve 8 puzzle. but how to animate the searching to my GUI ... A: Fendi, Sorry, but I don't have time to write this for you. I have to leave for a trip. The key to ...
File name of java	11/30/2007
Q: It is written in every book, when we save Java source code then it should be same as class name ... A: Ravi, > It is written in every book, when we save Java > source code then it should be same as ...
displaying a tamil	11/30/2007
Q: sir, am working with java swing appliation. i have created a database in ms access 2000 which ... A: Jisha, There are a couple of reasons why this could take place, and I'm not sure which one is ...
BFS	11/29/2007
Q: last time i have below code for puzzle using dfs and idfs, now i want to try using bfs, can u give ... A: Fendi, Okay, BFS is a little different from DFS and IDFS. It will always find the shortest path ...
JAVA	11/28/2007
Q: I have a question for the program on the monotone sequence. How would you input the sequence so that ... A: Jane, > > I tried using System.in and it lets me input the > sequence however I still get a zero ...
JAVA	11/28/2007
Q: I have a question for the program on the monotone sequence. How would you input the sequence so that ... A: Jane, In the sample program that I sent on 11/16, the input sequence had to be given on the ...
ArrayIndexOutOfBoundsException:	11/27/2007
Q: I keep on getting the Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0. ... A: Kinzo, > I keep on getting the Exception in thread > "main" ...
Deploying & running of WAR files into Apache Tomcat	11/22/2007
Q: I am working on Java project. I have issue that how to deploy, install and run the WAR files into ... A: Amit, Well, deploying web applications to a Tomcat server is basically the same on all platforms. ...
Long classpath	11/21/2007
Q: I have several batch jobs that need to run at different times of the day, and each job requires its ... A: Toly, Unix systems allow at least 64KB command lines, though some allow more. The Windows XP 8K ...
Long classpath	11/20/2007
Q: I have several batch jobs that need to run at different times of the day, and each job requires its ... A: Toly, Yes, the Windows command-line and environment variable length limitations are a pain. ...
Problem making a java program that involves Monotone sequences	11/15/2007
Q: I'd like to write a Java program that accepts a given sequence of integers, finds the longest ... A: Adam, Finding monotonically increasing and decreasing sequences in a list of integers is not very ...
"checking against the erased type" warning	11/15/2007
Q: I have a question about the warning I always get with Java 5: "Type safety: The cast from Object to ... A: Toly, > I have a question about the warning I always get > with Java 5: "Type safety: The cast ...
What is the benefit of component-based software development?	11/14/2007
Q: I am sorry, here is my question. What is the benefit of component-based software development? ... A: Izzzz, Component-based software development is the practice of creating software systems mainly by ...
java IO	11/13/2007
Q: i have a client aplication from java and the server aplication from delphi. i confuse while i send ... A: Rochmat, [You didn't provide any portion of the code, some I'm kinda guessing here. I'll do my ...
puzzle	11/11/2007
Q: in this code seems like u show the values in new array declaration. i already have it in Puzzle ... A: Fendi, > ok, maybe i want to ignore the GUI, in Puzzle class > can u explain more to me why there ...
JAVA/sql server 2005/XML	11/10/2007
Q: Build a Web page that presents an answer sheet to a test taker and records the test taker's answers ... A: Venkat, I'm not going to do this assignment for you, but I will tell you some technologies you'll ...
puzzle	11/9/2007
Q: in this code seems like u show the values in new array declaration. i already have it in Puzzle ... A: Fendi - > in this code seems like u show the values in new > array declaration. i already have it ...
puzzle	11/8/2007
Q: I already make the the graphic using frame, and i using 3 classes in different file, main class, GUI ... A: Fendi, This code has a couple of minor problems, but the big problem was your declaration of the ...
question	11/8/2007
Q: even if the main(String[] args) may be public or private or protectd or default then also the ... A: Uday, The rule about the main method needing to be public has always been a rule for the Java ...
Access Exchange RPC from JAVAMAIL API	11/7/2007
Q: I need to access my exchange server inbox from a java program. Will there be any problem since our ... A: Avinash, > > I need to access my Exchange server inbox from a > Java program. Yes, that can be ...
public T find(Class entityClass, Object primaryKey)	11/5/2007
Q: I think the syntax below is using generic, but why there is nothing before <T>, does that mean it ... A: Izzzz - For this method declaration: public <T> T find(Class<T> entityClass, Object primaryKey) ...
RMI & CORBA, RMI & IIOP	11/1/2007
Q: I am a bit confused RMI & CORBA, RMI & IIOP. Does RMI equal to CORBA ? What is the relationship ... A: Izzzz, CORBA is a language-independent set of programming conventions, object models, and abstract ...
New line in Lotus Notes document	10/31/2007
Q: Im creating new document in Lotus Notes database using package lotus.domino.I call createDocument() ... A: Zbynek, Well, it is possible that the appendItemValue method is removing your newline character ...
why we can change the value of a String variable when we put the String variable inside ArrayList ?	10/30/2007
Q: Do you know why we can change the value of a String variable when we put the String variable inside ... A: Izzzz - > Do you think we have to remember what Class/Object > can be modified, and what ...
java	10/30/2007
Q: I tried upgrading to java 6 but i have encountered this problem while downloading .. 1. Windows ... A: Carol, > It won't even start downloading because of those > error messages. That's very ...
Is digital dice possible ?	10/29/2007
Q: I'm new to programing... so I found myself my first problem. Is it possible to tell (program) the ... A: Leon, It is certainly possible to program a computer to simulate rolling dice, tossing a coin, or ...
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: Zbynek, I cannot find any documentation on the Lotus Notes packages (lotus.domino.*), so I cannot ...
java	10/28/2007
Q: I am working on fixing a website for my organization. Someone started and never finished the ... A: Ron, I've looked at the page and code involved, but cannot find any problems. I also could not ...
why we can change the value of a String variable when we put the String variable inside ArrayList ?	10/26/2007
Q: Do you know why we can change the value of a String variable when we put the String variable inside ... A: Izzzz - > It seems like if the parameter is a type of String, > then it passes by VALUE, but if ...
why we can change the value of a String variable when we put the String variable inside ArrayList ?	10/25/2007
Q: Do you know why we can change the value of a String variable when we put the String variable inside ... A: Izzzz - Strings are immutable. The code sample you have sent does not change the content of a ...
java	10/25/2007
Q: I am working on fixing a website for my organization. Someone started and never finished the ... A: Ron, Yes, I see the page and the fade-in at the top. The Javascript code is all coming from the ...
Does RMI use any port by itself, not RMI registry ?	10/24/2007
Q: Someone asked me what the default port of RMI ? I know RMI registry by default uses port 1099. Does ... A: Izzzz - Yes, a RMI server object will open a server socket port for itself. It will choose the ...
maze	10/23/2007
Q: i want to make simple maze, for example {0, 0, 0, 0 0, 1, 0, 0 2, 2, 0, 0 0, 0, 0, 0} [0][0] ... A: Fendi, This code doesn't really do anything. All it does right now is print out the contents of ...
java	10/22/2007
Q: i have a task i.e we have to create frame by using swings in that have to call Excel sheet and we ... A: Swaraj, I do not understand your question fully. I will answer all that I can. First, Java ...
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: Fendi, This code mainly walks through the maze array in row-major order. It is not a depth-first ...
bout java class	10/20/2007
Q: Im a beginner to JAVA language and im using Netbeans 5.0(mobility),i had difficulty on how to make a ... A: Arnold, Well, I'm not a NetBeans user myself, but when I have looked at it, adding classes ...
String pass by value ?	10/19/2007
Q: Why is the new value of X still 30, is that because of parameter N passed by value? should it be ... A: Izzzz - > You said "in order to make use of this aspect > of Java to modify an object passed to a ...
web browser	10/16/2007
Q: I was curious how I could display a webpage on a java form? A: Josh, There are a couple of meanings for the term "Java form", so there are a couple of possible ...
String pass by value ?	10/15/2007
Q: Why is the new value of X still 30, is that because of parameter N passed by value? should it be ... A: Izzzz - Java passes object references by value. So, the call increate(X); passes ...
Choosing the best path towards game programming	10/15/2007
Q: I am currently undertaking my final year project for my degree in Computing and Information ... A: Cedric, Okay, a 3D sudoku game should be pretty cool, although possibly very difficult for the ...
Is 'method overriding' for implementing polymorphism ?	10/12/2007
Q: As we know, interface and method overloading are for implementing polymorphism. How about method ... A: Izzzz - Method overriding is an aspect of inheritance. When you override a superclass method ...
throw Exception and catch Exception	10/9/2007
Q: The class A declares to throw ExceptionA, the class B declares to catch ExceptionB. How can the ... A: Izzzz - > The class A declares to throw ExceptionA, the > class B declares to catch ExceptionB. ...
throw Exception and catch Exception	10/9/2007
Q: The class A declares to throw ExceptionA, the class B declares to catch ExceptionB. How can the ... A: Izzzz - > How can the class B access an instance of class A? > An instance of class B can always ...
Code Math Error	10/8/2007
Q: i need to find the smallest positive integer n such that these two equations are NOT equal ... A: Roxy, I can see where the error is occuring, but I do not know how to fix it. Java is not the ...
Is the ThreadLocal a container, and can only contain one variable at a time?	10/3/2007
Q: Is the ThreadLocal a container, and can only contain one variable at a time? Thanks,lzzzz A: Izzzz - ThreadLocal is a container, and it can contain one object at a time, per thread. Each ...
how to create a cirle	10/3/2007
Q: I want to create a game using java application.I want this game to work like this, I've got 3 ... A: Ditto, There are a lot of issues implicit in your question. I'll try to address a few of them. ...
bytes = characters ?	9/17/2007
Q: I wonder if you knnow these three questions, 1. As we know, Java uses two bytes to store one ... A: Izzzz, > > 1. As we know, Java uses two bytes to store one > character, does the operating ...
variables of primitive type = scalar variables?	9/14/2007
Q: Do you know why we call the variables of primitive type scalar variables? Thanks, lzzzz A: Izzzz - I think the term "scalar variable" is to distinguish scalar types from aggregate or ...
Are the term "character literal" and "character constant" the same?	9/12/2007
Q: Are the term "character literal" and "character constant" the same? Thanks, lzzzz A: Izzzz, Yes, in a description of Java code, they are the same. char a = 'x'; // set a to ...
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: TN - I don't understand your question. There is no portable way to read a single character from ...
Is array a data type in Java and C++ ?	9/9/2007
Q: Is array a data type in Java and C++ ? Thanks, lzzzz ANSWER: Izzzz - Array is a data type in ... A: Izzzz - The array object type is kind special, so you won't find it explicitly in the API ...
Is array a data type in Java and C++ ?	9/9/2007
Q: Is array a data type in Java and C++ ? Thanks, lzzzz A: Izzzz - Array is a data type in Java, it is a subclass of Object. For example, the following is ...
Upload existing file	8/31/2007
Q: I am working on a web application. I have a some issues regarding particular equipments. When the ... A: Usha, I cannot understand enough about your implementation to recommend a specific solution, and ...
int var = 1234 ?	8/19/2007
Q: If I declare a variable is int, can I assign a value of 1234 to it? because one ASCII number ... A: Izzz, When you express "1234" as a string of ASCII characters, it would require one byte for each, ...
Host Access Class Library X Host Access Beans	8/17/2007
Q: autECLPS...) to do this. But package (the only I was able to found) com.ibm.eNetwork.ECL contains ... A: Zbynek, I don't think you'll find any Java package that will let you control the session already ...
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: Zbynek, Well, I do not know of any 5250 access libraries that are free or open source. The IBM ...
Invalidate session in HttpSessionBindingListener	8/10/2007
Q: Currently, i am facing a difficulty in invalidating a session in a class that has implemented ... A: Pak, First, you don't need to invalidate a session when its timeout is reached. The servlet ...
Was Livescript or Mocha was used with Windows 3.0?	8/3/2007
Q: From what Iâ€™ve read, JavaScript was preceded by Livescript. Livescript was preceded by Mocha. ... A: Green, Well, I'm not exactly an expert on Javascript, but I did live through the early development ...
Upload an xml file using an htp post request	7/30/2007
Q: I want a code to send an xml file using an http post request. A: Hetal, To upload a file, XML or any other kind, from a Java application you must use the java.net ...
Project idea	7/27/2007
Q: I have an idea regarding the final year project. Its like text to speech applications for messages ... A: Jack, It may be possible to create a text-to-speech Java application for cell phones. It will ...
How do reduce garbage collection overhead?	7/26/2007
Q: How do reduce garbage collection overhead? Thanks, lzzzz A: Izzzz - > > How do you reduce garbage collection overhead? > There is no simple answer to this ...
Java messenger	7/20/2007
Q: I've been trying to create a java messenger program using servlets and applets interaction. i have ... A: Vhalerie, You can only call the getCodeBase() method on your Applet object. In the code snippet ...
How does Java handle overflow and underflow?	7/19/2007
Q: How does Java handle overflow and underflow? Thanks, lzzzz A: Izzzz - Java does not give any explicit notifications of arithmetic underflow or overflow. For ...
Regression Testing?	7/19/2007
Q: By any chance, do you know about Regression Testing? Thanks, lzzzz A: Izzzz - I know quite a bit about regression testing, but you haven't asked any specific question. ...
Java Classpath	7/18/2007
Q: Newbie here... I recently began trying to program in java until I ran into, what I believe is, a ... A: Buddaboy, Yes, I understand why the compiler gave you an error in the first case. When you put an ...
java script	7/17/2007
Q: i want to expand and restore my table in my home page screen using java script.could you plz tel ... A: Prashanthkumar, I don't know all that much about Javascript, despite the similar name it isn't ...
final year project	7/14/2007
Q: Sir, I m in last year , I want to make a project in j2me , i have some knowledge of it , i ... A: Hardik, J2ME (JavaME) is a platform for developing apps for small, mobile, and wireless devices. ...
Jrun Installation in a server	7/10/2007
Q: Can you please guide me as how to install JRUN in a server? I could pull a trial version of jrun ... A: Tina, > can you please tell me what is the > cost of all the three: > Jrun > JBoss > J2EE SDK ...
Its about Java, please help me!!	7/4/2007
Q: 1.In your opinion, why do software developers choose Java technology in their program application ... A: Ryuzaki, I can answer the question about Java technology, but not the one about network games. I ...
java!!! help!!!	7/2/2007
Q: ok now my Java is not working ... as U can tell.. i have downloaded several Java .. applets .. i ... A: Noal, You must be running Windows. Sigh. Uninstalling software on Windows can be a chore ...
*Accessing .dll files injava**	7/2/2007
Q: sir i have a Active x dll file which is written in VB i need to access that dll file inside my java ... A: Rajendra, You cannot call the functions in a DLL directly from Java, you must write some proxy code ...
what is the assignment rule	6/28/2007
Q: byte b; final int l=100; b=l; no compilation error for this upper code but why error coming for the ... A: Sutapa, Both blocks of code are okay. The line b = l; should give a warning in both cases, ...
Jrun Installation in a server	6/28/2007
Q: Can you please guide me as how to install JRUN in a server? I could pull a trial version of jrun ... A: Tina, Don't use JRun. It is very old. If you want a J2EE installation, get JBoss or the Sun ...
Single Class with custom methods	5/21/2007
Q: I've been reading books about Object Oriented Analysis, and i dont understand what does a Single ... A: Jose Miguel - I am familiar with object oriented analysis, but I'm not an expert on it. There ...
Java ArrayList	5/18/2007
Q: How do I create an arraylist in java of the type int? I tried the following code: ArrayList <int> ... A: Rob, The generics facility in Java can be used only for object (reference) types. It cannot be ...
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: Roshin, Your question is not very clear. What do you mean by "a bulk of data"? Could you mean the ...
JMS	5/10/2007
Q: Sir, I am trying to configure and run JMS in my system. for that i downloaded j2sdkee1.3.1 and ... A: Shinil, Why are you installing J2SDK 1.3 and J2EE 1.3? They are ancient. If possible, you should ...
code	4/30/2007
Q: can you write a Java applet that reads in two floating-point numbers and determines if the first ... A: Danielle, Certainly you can write a Java program that compares two floating-point numbers and ...
coding	4/30/2007
Q: how do i write a method called multiConcat that takes a String and an integer as parameters. Return ... A: Danielle, This is very easy to do, but the simplest approach will be very inefficient. public ...
java arrays	4/29/2007
Q: is there anyway to have a multi-dimensions array in java? A: Maged, Yes, Java can support multi-dimensional arrays, it treats them as arrays of arrays. For ...
java	4/28/2007
Q: I tried upgrading to java 6 but i have encountered this problem while downloading .. 1. Windows ... A: Carol, The Windows offline installation is usually the best way to go, that's what I always use. ...
structs	4/28/2007
Q: Can I change the name of the struts-config file what should be the name of struts-config file if ... A: Sree - I'm not an expert on Struts, unfortunately, but I do know a little about it. In Structs ...
filesize	4/3/2007
Q: I need to write a Coldfusion Java extension passing a filename as an argument and then returning the ... A: Joe, I don't know anything about writing Coldfusion Java extensions, although I know it should ...
JPanel+swing +java	4/3/2007
Q: Is there any method to align the JPanel inside frame. I want to fix the position of a JPanel inside ... A: Vijay, There are several ways to align a JPanel inside a JFrame. You'll need to consider your ...
Java: polymorphism	4/2/2007
Q: i am little confunsion in 1 basic fundamental of compiler desinging , in compiler books mention ... A: Nilesh, Method overloading in Java is when you have several methods that have the same name, but ...
Users Connected to site	3/26/2007
Q: How do u know how many users r connected to a site? A: Manjula, I don't understand what you mean by "users r connected to a site". Are you thinking ...
i am getting problem to run java prog in another	3/25/2007
Q: class Hello { public static void main(String args[]) { System.out.println("Hello ALLEXPERTS.COM"); ... A: Saidulu, Okay, you have a lot of the right code here, but you are missing something important. ...
RSA java !	3/23/2007
Q: Assume that there are two machines A and B where A will provide the public key for RSA encryption ... A: Michael, You are being asked to implement the encryption and decryption algorithms of RSA. That ...
Java Batch file	3/20/2007
Q: I would like to write a Java file which functions as Batch file how to write? any examples or link ... A: Lucksman, I don't know what you mean by "functions as a Batch file". It sounds like you want to ...
Is the "java abstract" the counterpart of "c++ virtual"?	3/19/2007
Q: Is the "java abstract" the counterpart of "c++ virtual"? Thanks, lzzzz A: Izzzz - No, the Java keyword 'abstract' is nothing like the C++ keyword 'virtual'. A C++ method ...
assignment	3/19/2007
Q: i have given an assignment to make a java program which shows the output "starics in diamond shap" ... A: Naeem, I had a lot of difficulty understanding your question, but I think you mean "asterisks in a ...
Sort 2 attributes with collection sort	3/16/2007
Q: I solved the problem to sort the Employee first based on Employee Id and then based on Employee ... A: Mary, You can easily combine the results from several Comparators for an object class into one ...
xxxFactory classes and singleton	2/1/2007
Q: I found almost all xxxFactory classes has a newInstance() static method, does that mean those ... A: Izzzz, > I found almost all xxxFactory classes has > a newInstance() static method, does that > ...
portable java	1/12/2007
Q: I am fairly new to java (I've been studying it for a couple months). I am wondering if I can put a ... A: Miles, You can do this, and bring a usable JRE with you. You could also set up your applications ...
Boolean vs. true and false?	1/12/2007
Q: Just a thought, I wonder why JDK provides a Boolean, I don't see anywhere we have to use it instead ... A: Izzzz - > I wonder why JDK provides a Boolean, I don't > see anywhere we have to use it instead of ...
static methods	1/1/2007
Q: what is this java language specification. where can i find itwhy we can not override a static method ... A: Surendra, > > what is this java language specification? > The Java Language Specification (JLS) ...
static methods	12/31/2006
Q: why we can not override a static method in subclass A: Surendra, > > why we can not override a static method in subclass? > Static methods are implicitly ...
Another multithread question?	12/30/2006
Q: if somebody created a class and he/she says that this class is thread-safe, does that mean this ... A: Izzzz - > if somebody created a class and he says that this > class is thread-safe, does that mean ...
Another multithread question?	12/29/2006
Q: What about if my application starts multithreads and they all share the same instance of class A? in ... A: Izzzz - If several threads in your program share the same instance of class A, then class A would ...
Another multithread question?	12/21/2006
Q: Suppose my application uses the class A, and the class A uses the class B, and I can tell the class ... A: Izzzz - The situation isn't that bad. If you have an instance of class A, which uses an ...
help!!	12/21/2006
Q: 1.What is a constructor and why is it important? Is it possible to write a java code without a ... A: Dahlia, > > 1.What is a constructor and why is it important? Is > it possible to write a java ...
Query regarding java	12/19/2006
Q: Is java is better than .net? If yes why it is. Tell me more about the need of JAVA in market. As a ... A: Pratik, > > Is Java better than .net? > Well, both Java and Microsoft .net have advantages and ...
Generics and Type Erasure problem.	12/17/2006
Q: I've tried searching the web for 2 days without answer. I have a ApplicationHelper.java that ... A: Shawn, You are essentially correct that the type erasure is what's generating your warning. ...
protected constructor and anonymous class?	12/12/2006
Q: So if we use the syntax like new TimerTask(), which means we call the TimerTask constructor from the ... A: Izzzz - > So if we use the syntax like new TimerTask(), which > means we call the TimerTask ...
protected constructor and anonymous class?	12/11/2006
Q: The the constructor of the class java.util.TimerTask is protected, why I can new it like I did in ... A: Izzzz - > > The constructor of the class java.util.TimerTask is > protected, why I can new it ...
SCJP	12/8/2006
Q: QUESTION NO: 76 Exhibit: ClassOne.java 1. package com.abc.pkg1; 2. public class ClassOne { 3. ... A: Mandar, For question 76, the correct answer is A. If your book said the answer that compilation ...
SCJP	12/8/2006
Q: QUESTION NO: 71 Exhibit: 1. class A { 2. public byte getNumber () { 3. return 1; 4. } 5. } 6. 7. ... A: Mandar, Ah, these are easy questions. For Question No 71, there is an obvious problem at line ...
SCJP	12/5/2006
Q: QUESTION NO: 139 Exhibit: 1. class A implements Runnable ( 2. int i; 3. public void run () ( 4. try ... A: Mandar, Question 139 expects you to remember how various thread capabilities work. In this case, ...
SCJP	12/5/2006
Q: QUESTION NO: 136 Given: 1. public class Foo { 2. public static void main (String [] args) { 3. ... A: Mandar, Both of these questions ask you to understand how StringBuffer works, and how arguments ...
SCJP	12/4/2006
Q: QUESTION NO: 75 Given: 1. public class A { 2. void A() { 3. System.out.println(“Class A”); 4. } 5. ... A: Mandar, Question 75 is easy: the code is perfectly legal. It simply runs with no output. Lines ...
SCJP	12/4/2006
Q: Sir thanks for answering to my questions........ QUESTION NO: 74 Given: 20. public float ... A: Mandar, All of this code is legal. However, there are some conventions or best practices that ...
SCJP	12/2/2006
Q: QUESTION NO: 57 Given: 1. public class Test { 2. public static void main(String[] args) { 3. int x = ... A: Mandar, This question is trying to be tricky. You have to be fully aware of the syntax of the ...
SCJP	12/2/2006
Q: QUESTION NO: 66 Given: 1. class A { 2. } 3. class Alpha { 4. private A myA = new A(); 5. 6. void ... A: Mandar, Given the code that they've shown you here, three of the statements are correct: A, B, ...
SCJP	12/1/2006
Q: # QUESTION 82 Given: 1. public class Outer{ 2. public void someOuterMethod() { 3. // Line 3 4. } 5. ... A: Mandar, Line A, "new Inner();" will create an instance of the class Outer.Inner. Line A is ...
SCJP	11/30/2006
Q: QUESTION 63 Given: 11. int i = 0, j = 5; 12. tp; 13. for (;;) { 14. i++; 15. for(;;) { 16. if (i> ... A: Mandar, This code, as you've typed it, has two problems. 1. Line 12 has a syntax error: it ...
SCJP	11/30/2006
Q: QUESTION 59 Given: 1. public class OuterClass { 2. private double d1 = 1.0; 3. // insert code here ... A: Mandar, There are five choices. A - this code is not legal, because it defines a static ...
how to access data site that use ActiveX controls	11/22/2006
Q: I want to pull data from a web site that is heavily using Ms-ActiveX controls. How can i do this ... A: Jayant, > I want to pull data from a web site that is > heavily using Ms-ActiveX controls. How can ...
regarding synchronization	11/22/2006
Q: >If the rest of your program ensures that a method will >not be called against the same object from ... A: Izzzz - > > 1/ Do I need to be care of the rest of my > program, because this method doesn't ...
regarding synchronization	11/18/2006
Q: With the following static method, 1/ do we need to synchronized it because it is static method and ... A: Izzzz - As written, this method does not really need to be synchronized. Let's discuss your ...
teacher question	11/5/2006
Q: Can you help me? this is the previous program. i don't know whether it can work or not.if i have ... A: Arianto, Okay, I understand your questions better now. I did not understand that you had to ...
teacher question	11/4/2006
Q: i have a question from my teacher.can you please help me to find the solution? this is the question ... A: Arianto, > Find a class in the Java API that implements a > static method to perform a sort on an ...
Sorting Collections	11/3/2006
Q: I need to sort a list of Objects where the objects may belong to many different classes. A: Kha, If you need to sort a list composed of many different types of Objects, then you must ...
ask two questions	11/2/2006
Q: 1/ if we want a class object serializable, we have to make all its attributes serializable or mark ... A: Izzzz - > 1/ if we want a class object serializable, we have > to make all its attributes ...
Sorting Collections	11/2/2006
Q: I have a list of Object. Every object has some same attributes. I want to sort this list by object's ... A: Kha, You can sort any List of Objects, as long as all the Objects implement the interface ...
anonymous classes	11/1/2006
Q: Why anonymous classes don't work with ArrayList? For example, if I write something like the code ... A: Cesar, > > Why anonymous classes don't work with ArrayList? Anonymous classes work fine with ...
It seems like we can not cast a array, why ?	11/1/2006
Q: It seems like we can not cast a array, why ? -------------------------------------------- public ... A: Izzz - You cannot cast an array of a supertype into an array of a subtype. That is illegal in ...
java Networking	10/31/2006
Q: Please i need help i want to know how can i creat Java Desktop chatting Application that [Work on ... A: Mutaz, A Java networking application will work on a WAN or a LAN, as long as you write it ...
I have two questions about array	10/30/2006
Q: I have two questions about array, 1/ what happens if I define a zero length array such as ... A: Izzzz - > > 1/ what happens if I define a zero length array > such as String[0] ? It is perfectly ...
class's signature ?	10/12/2006
Q: For a method , we can say "the method's signature", but for a class, can we say "the class's ... A: Izzzz, > > For a method , we can say "the method's signature", > but for a class, can we say "the ...
how to generate serialVersionUID ?	10/11/2006
Q: Java Doc says that A serializable class can declare its own serialVersionUID explicitly by declaring ... A: Izzzz - You don't have to generate any fancy number. You can just set any number. The only ...
Java	10/11/2006
Q: how to get console window(as we run a console application in .net)as we run a run a java program. A: Muthulakshmi, If you want to run a Java program that does console I/O (using System.in and ...
pixels and centimeters	10/4/2006
Q: Gud day! I just want to asl if how can i convert pixels to centimeters? Thank you.... A: Hannah, It is possible to obtain sizing information so that you can convert from screen pixels to ...
Is the statement "Iterator also known as Cursor" correct?	10/3/2006
Q: Is the statement "Iterator also known as Cursor" correct? Thanks, lzzzz A: Izzzz, Well, an iterator is similar to a cursor, but the two words are not typically used the ...
Java API to create a temporary folder in file system ?	9/29/2006
Q: I heard that we could use Java API to create a temporary folder in file system, and OS will manage ... A: Izzzz - > I heard that we could use Java API to create a > temporary folder in file system, and OS ...
Skipping a lost packet?	9/27/2006
Q: ok, lets see if I can be more specific.. so I followed the stack trace back to where it was causing ... A: Josh, I sent you a long answer to this question several days ago, but AllExperts appears to have ...
Skipping a lost packet?	9/26/2006
Q: Ok, me and a friend are making a game that is LAN. We are using MulticastSockets to connect. Kinda ... A: Josh, Well, I don't think that dropping packets could be the root cause of your problem. When the ...
Math.random() method	9/22/2006
Q: The random() method is found in the Math class, right? But what exactly does it do when invoked? ... A: Nelson, The method Math.random() generates pseudo-random numbers in the range [0,1). Each time ...
diplay location of a drawn circle	9/19/2006
Q: I read the suggested website and your suggestion in Command Promt window but didn't work. Where do I ... A: Tim, The sequence you describe for creating a Jar file is correct, according to the JCreator web ...
diplay location of a drawn circle	9/16/2006
Q: Would you please show me how to convert the java file such the one you wrote into jar file (EXE ... A: Tim, > Would you please show me how to convert the java file > such the one you wrote into jar file ...
AccessControlException	9/15/2006
Q: Exception in thread "AWT-EventQueue-1" java.security.AccessControlException: access denied ... A: Chandu, These exceptions are to be expected. It would appear that you tried to open a local file ...
diplay location of a drawn circle	9/12/2006
Q: I would like to display the location (x=400,y=400)of the gray circle right on top of it. Please ... A: Tim, Drawing text is pretty easy. You just create a Font object, set it on your Graphics object, ...
Do input/output stream are always relative to the user/programmer code ?	9/11/2006
Q: I wonder if the concept of the input/output stream are always relative to the user/programmer code, ... A: Izzzz - > I wonder if the concept of the input/output stream > are always relative to the ...
applets	9/11/2006
Q: my name is chandu am working as a software engineer. I came across a situvation that... i have to ... A: Chandu, > > I came across a situation that... > i have to create a frame in applets Yes, it is ...
Calling functions by name	9/9/2006
Q: Maybe I did not explain it right, but not Calc is the issue. This is one function and will stay that ... A: Mihai, > Maybe I did not explain it right, but not Calc is > the issue. This is one function and ...
Calling functions by name	9/8/2006
Q: I was weondering if it is possible to "compile" the name of a function I want to call from an other. ... A: Mihai, Yes, it is possible to call functions by name, but it isn't very easy or efficient. You can ...
How to be a good java programmer?	9/2/2006
Q: I am 22 year old. I have completed a three years course of Bachelor of science in Information ... A: Apurva, > I desperately want be a java programmer. ... > Can you give me some tips how to do it? > ...
java	9/1/2006
Q: can anyone tell me how to send email using spring framework in java? also provide me the code. A: Deep - The Spring framework offers several classes for sending e-mail. Unfortunately, I've never ...
is List index re-arranged?	8/31/2006
Q: I wonder if a List re-arranges the index after one or more its element is deleted in the middle? ... A: Izzzz - > I wonder if a List re-arranges the index > after one or more its element is deleted in ...
application memory space	8/30/2006
Q: I have three questions about application memory management, 1.does an application run within its ... A: Izzzz - Okay, these are not difficult questions. > 1.does an application run within its own memory ...
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: Izzzz - Basically, it is just like the names indicate. debug - debugging and program tracing ...
Ç and \u00E7	8/9/2006
Q: I wonder why the following first statement works, but the second one doesn't, because \u00E7 is ... A: Izzzz - Is this a trick question? \\u00E7 is not the unicode value for uppercase C with cedilla, ...
run time problem	7/13/2006
Q: I just started on java and wrote the helloworld.java program. It compiled fine (javac ... A: Jian, > > Exception in thread "main" > java.lang.UnsupportedClassVersionError: Ch2Birthdate > ...
java -cp resourcedir;lib.jar -jar main.jar	7/10/2006
Q: I asked you one question about java classpath. Now I encounter another problem with "java -cp ... A: Izzzz - If you run the command "java -cp resourcedir;lib.jar -jar main.jar" then the classpath is ...
Gegorian 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: Talia, > > I want to write a code in java that constructs > a gregorian calendar > Java already ...
wonder how 'this' works	7/6/2006
Q: Ha, that is the magic "this" I forgot. What can the "this" represent, overall? can it represent a ... A: Izzzz - > > What can the "this" represent, overall? > can it represent a method? No, the keyword ...
Where is the Iterator interface implementation?	7/6/2006
Q: I am using the java.util.HashSet class, which has an Iterator method that returns an Iterator. I ... A: Adrien, > > When I look into java.util package, there is only > an Iterator interface (no ...
wonder how the	7/5/2006
Q: I wonder how the "replace(char oldChar, char newChar)" method of the String class is implemented, ... A: Izzzz - The replace method works on the String object for which it is called. It creates a new ...
Career in Programming	7/3/2006
Q: Neil, If you had to do it all over again, would you still learn java over the other programming ... A: Paul, Well, when I was first learning to program, Java didn't exist yet. I learned PL/1, ...
java package starting point	6/26/2006
Q: I wonder where does the java package root start from. With the following code, the java statements ... A: Izzzz - The Java package root starts at each location along the CLASSPATH. The Java compiler and ...
How to Print a Simple Text File in Java?	6/24/2006
Q: I hope you are doing okay. Neil, i am stuck in a problem. Actually i am developing an application ... A: Jules, There are several ways to print from Java. First, I want to understand what you are trying ...
try and finally block exceptions	6/23/2006
Q: I wonder if the following method addContact() will throw NamingException and SQLException if those ... A: Izzzz - With the code written as you have shown, it is not possible for two exceptions to occur. ...
static methods and inheritance	6/19/2006
Q: I saw the following sentence on Sun Java Forum, is that right? With static methods you lose ... A: Izzzz - > > With static methods you lose inheritance, > polymorphism and all the fun stuff of OO. ...
Java networking under Linux and Windows	6/17/2006
Q: Sir, I tried to have communication between 2 systems in which one is in Windows XP and the other in ... A: Siva, In general, Java doesn't care whether it is running on Linux, or Windows, or any other ...
Is the Java bytecode the same as the binary code?	6/16/2006
Q: one more question, Is the Java bytecode the same as the binary code? Thanks, lzzzz A: Izzzz - > > Is the Java bytecode the same as the binary code? > That depends on what you mean by ...
Where do these two mehtod readResolve() and writeReplace() come from?	6/14/2006
Q: Where do these two mehtod readResolve() and writeReplace() come from? Thanks, lzzzz A: Izzzz - Both of those methods are special parts of the JVM's support for serialization. You can ...
Is it normal to throw an exception from a constructor?	6/13/2006
Q: another) Is it normal to throw an excepetion from a constructor? Thanks, lzzzz A: Izzzz - Yes, it is normal to throw an exception from a constructor. In fact, throwing an exception ...
how many copies of the attribute	6/10/2006
Q: With the following code, how many copies of the attribute "i" and method "testMethod" in the memory? ... A: Izzzz - With the code you sent, there will be one copy of the method testMethod in memory, and no ...
java logging	5/25/2006
Q: I m currently developing a small Java application. I need to use the Java Logging API. Do you know ... A: François, Yes, there are a couple of free viewers for the Java Logging API's XML format. I ...
How many ways we can get a class object for the java reflection?	5/25/2006
Q: One more thing, I can find the "evidence" for all other ways except the first way: 1. Class c = ... A: Izzzz - > One more thing, I can find the "evidence" for all > other ways except the first way: > ...
How many ways we can get a class object for the java reflection?	5/24/2006
Q: How many ways we can get a class object for the java reflection? Are the following 4 ways correct? ... A: Izzzz - Yes, all four of these ways will work. However, the argument to Class.forName must be a ...
Serializable in Java	5/20/2006
Q: good morning sir, could please tell me about Serializable in java with a suitable example. and in ... A: Ram, The java.io.Serializable interface is used to mark classes that may be written using ...
about super.someMethod()	5/19/2006
Q: As I know, the statement super.someMethod() only calls one level up, but how can we call two or ... A: Izzzz, > > the statement super.someMethod() only calls one level up > This is not quite true. ...
If I only use static mehtods of a class, will the JRE still create a object of that class ?	5/8/2006
Q: If I only use static mehtods of a class, will the JRE still create a object of that class ? Thanks, ... A: Izzzz - > > If I only use static methods of a class, will the > JRE still create an object of ...
Do we need to make every class (we developed) ready for multithreading ?	5/4/2006
Q: Do we need to make every class (we developed) ready for multithreading ? Thanks, lzzzz A: Izzzz - > > Do we need to make every class (we develop) > ready for multithreading ? No, you do ...
vinod	5/3/2006
Q: I have a file in the server and i want that file to be downloaded into my hard disk. How should i do ... A: Vinod, > > I have a file in the server and i want that file to > be downloaded into my hard disk. ...
binary trees	5/3/2006
Q: the resulting tree will NOT be balanced. Why is that the case? A: Sudha, I think it depends on how you write the tree to disk. If you write the tree to disk in a ...
if the superclass class implements Serializable, does the subclass need to implement Serializable as well?	5/2/2006
Q: if the superclass class implements Serializable, does the subclass need to implement Serializable as ... A: Izzzz - > > if the superclass class implements Serializable, > does the subclass need to implement ...
How to share object between threads?	5/1/2006
Q: I have two follow-up questions, 1/ How many ways do we have to share an object between threads? 2/ ... A: Izzzz - > > How many ways do we have to share an object > between threads? This isn't really a ...
How to share object between threads?	4/21/2006
Q: How to share object between threads? Thanks, lzzzz A: Izzzz - > > How to share object between threads? > You don't need to do anything special to share ...
Parsing file to hashmap	4/4/2006
Q: I want to parse a .config file to concurrent hashmap. It should also perform some validation checks ... A: Saurabh, I don't understand your question. The program you are being asked to write looks simple ...
Java and CGI	4/4/2006
Q: Now I am having other problems with CGI script and Java. I am trying to write a client side java ... A: Kimsan, Your Java code is okay, although I do not approve of hard-wiring the URL into the main ...
How to know whether an object is executed by more than one thread or not?	4/3/2006
Q: How to know whether an object is executed by more than one thread or not? Thanks, lzzzz A: Izzzz - There are a couple of ways of telling whether an object's methods are being invoked from ...
What is the difference between reflection and introspection ?	3/20/2006
Q: What is the difference between reflection and introspection ? Thanks, lzzzz A: Izzzz - They mean mostly the same thing, but can be used slightly differently. A language that ...
Java	3/20/2006
Q: I am very new to Java Programming and i can say that i know nothing about it. At the moment, i need ... A: Kimsan, The project you describe is not for a Java beginner. It will be too difficult. However, I ...
java web crawler	3/19/2006
Q: Im trying to develope a webcrawler that will index web pages and feed them into a database. But i ... A: Hassan, Reading your code, it looks like you want the AWT List object to be part of your GUI. ...
CPU	3/10/2006
Q: Please give me the source code in java for finding the cpu utilization of a computer. Thanks A: Meghala, There is no good portable way to do that. Every operating system provides different ...
regarding class and interface	3/9/2006
Q: I got this conclusion by using java compiler to compile several pieces of codes as follows, is my ... A: Izzzz - Those conclusions are essentially correct, but they could be stated more accurately. I'd ...
What is the difference between creating object by using new and newInstance ?	2/28/2006
Q: What is the difference between creating object by using new and newInstance ? Thanks, lzzzz A: Izzzz - > > What is the difference between creating object by > using new and newInstance ? ...
inheritance and superclass instance	2/7/2006
Q: I remember when constructing a subclass, the compiler have to call its superclass constructor first, ... A: Izzzz - > I remember when constructing a subclass, the compiler > has to call its superclass ...
Invoking Web Services through JSP	2/6/2006
Q: I hope you are doing fine and well. Neil, i have a particular question where i am stucked at. ... A: Juliana, Ah, this is a little outside my expertise. I've written JSPs, and I've played with web ...
java networking	2/6/2006
Q: ------------------------- Hi I apologize because i am slow to pick things up as i am still new to ... A: Kim, > > How do i check if the rmiregistry is running? > Usually, you'd run it yourself. If you ...
run program on server, share by clients	2/5/2006
Q: I am preparing the crm software on the home system, i want that my CRM software to put on the ... A: Vaibhav, If you are writing the CRM software to act as a server, you need to select some means for ...
inheritance and superclass instance	2/5/2006
Q: If I use inheritance, the JVM will create a separate object of the type superclass for each specific ... A: Izzzz - > If I use inheritance, the JVM will create a > separate object of the type superclass for ...
java networking	2/4/2006
Q: What do you understand about this line of code? service = ... A: Kim, > > When i compile the program, i got an exception > java.rmi.ConnectionException: ...
thread and stack	2/2/2006
Q: execute me, one more question, I wonder if the same thread executes the same call chain/stack? ... A: Izzzz - > > I wonder if the same thread executes the same > call chain/stack? > Well, yes. Each ...
critical error and RuntimeException	2/1/2006
Q: If a critical error occured, and I want the application stop, then can I just throw a ... A: Izzzz - > > If a critical error occured, and I want the > application to stop, then can I just ...
static method and object reference	2/1/2006
Q: If I create a static method with a parameter, and the parameter is a reference to an object, then ... A: Izzzz - If you create a static method with an Object parameter, and the method code simply stores ...
how many reference variable are created?	1/30/2006
Q: Two follow-up questions come up: 1/ I wonder why There is only one local variable of the Foo type, ... A: Izzzz - > > 1/ I wonder why There is only one local variable > of the Foo type, since there will ...
becoming a Sun Certified Java Programmer	1/29/2006
Q: what do you mean by this >>>2. Use Java for real projects. Could you explain it to me? I'm still in ... A: Hans, > > what do you mean by this >>>2. Use Java for real projects. > > Could you explain it to ...
becoming a Sun Certified Java Programmer	1/29/2006
Q: How do you become a Sun Certified Java Programmer? What are the steps to be taken? I have been ... A: Hans, > > How do you become a Sun Certified Java Programmer? > You have to take a test designed ...
how many reference variable are created?	1/20/2006
Q: I would like to know how many reference variable "foo" itself are created, and how many object of ... A: Izzzz - public static void main(String[] args) { for(int i=0; i<10; i++) { Foo foo = new ...
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: Kim, Well, this isn't exactly the best way to use sockets, but the approach should work. You ...
Sorry for question again	1/18/2006
Q: 1/ do you mean if the class doesn't have a custructor with no arguments, we have to use the method ... A: Izzzz - > > do you mean if the class doesn't have a custructor with > no arguments, we have to use ...
Sorry for question again	1/10/2006
Q: Given that we use "new" to create instance1 and instance2, if I change the values of instance ... A: Izzzz - > > We use "new" to create instance1 and instance2, if I > change the values of instance ...
Happy New Year!	1/8/2006
Q: I am confused about the following two questions: 1/if a class has static variable, can the class ... A: Izzzz, I can explain these two things. > 1/if a class has static variable, can the class > be ...
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: Hyder, I'm familiar with the 8-queens problem, of course, although I have not bothered to write a ...
java network access	12/22/2005
Q: Im making a program that will allow users to search a database, using keywords. i would also like to ... A: Shaz, In general, Java will not let you search the user's local folders and files from a remote ...
Do you know why variables must be declared before it is used, but not methods?	12/22/2005
Q: another question :) Do you know why variables must be declared before it is used, but not methods? ... A: Izzzz - > Do you know why variables must be declared before use, > but not methods? > Yes. Local ...
two semi-colons ?	12/19/2005
Q: I guess this the last question on this topic:) When I run the following program, why I got two ... A: Izzzz - > > why I got two semi-colons except for the first > and last one as follows? > > ...
Sorry for not a java specific question	12/18/2005
Q: Welcome back. Hope you still remember this question. I wonder if you can tell me how to do the ... A: Izzzz - Here is the main routine, so you can see how I generated the test strings and how I timed ...
Sorry for not a java specific question	12/1/2005
Q: I try to use recursive call to write a string reverse function as follows, my problem is that it ... A: Izzzz - Wow, you code has a lot of odd pieces. Let's look at a few of them. 1. ...
Java	11/28/2005
Q: i need help on inserting an array to 6x6 2D arrays. In other words when I run the program the 6x6 ... A: Hyder, The code that you have written so far will correctly display a fixed 6x6 array of ...
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: Tan, 1. This little program is using a facility of the Java NIO packages to lock a file. In ...
Java	11/26/2005
Q: I'm a beginner in java. I'm trying to make a simple choice menu e.g. Main menu 1. add numbers ... A: Hyder, I'm not sure if you are asking for a GUI menu (to use with a graphical display and ...
uninstalling java	11/22/2005
Q: i had j2se 5.0 update 4. i couldnt uninstall it so i deleted all of its files from the start/search ... A: Tom, This is really more of a Windows question than a Java question, but I'll try to give you ...
How Xhsc Works with Plain Text???	11/22/2005
Q: I recently stumbled across Xhsc (The XML Hierarchical Structure Creator). Nice job by the way...I ... A: Jarno, Okay, what you want to do is not really what Xhsc was designed for. However, it can do ...
Java	11/18/2005
Q: I encountered some problems with some of the sample codes that i downloaded from the Internet and ... A: Tan, Actually, these questions are not very complicated. First, this code: > public static void ...
It seems that we can not throw an exception at class level as illustrated below, is there any reason for that?	11/17/2005
Q: It seems that we can not throw an exception at class level as illustrated below, is there any reason ... A: Izzzz - > > It seems that we can not throw an exception at > class level. Is there any reason for ...
Access modifier is class level, not object level. what does it means?	11/15/2005
Q: I don't remember I got an answer to the question from you, if I did, sorry about that. My one ... A: Izzzz - > The term "class level, not object level" here has > the same meaning as what we use for ...
Access modifier is class level, not object level. what does it means?	11/13/2005
Q: Access modifier is class level, not object level. what does it means? Thanks, lzzzz A: Izzzz - > Access modifier is class level, not object level. > What does it means? I'm pretty ...
counting characters 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: J - There are several ways to approach this problem. First, let's break it into its constituent ...
Port 80	11/11/2005
Q: For this, i tried the following program. but it returns a blank line and then quits.. here is ... A: Aswin, You've got a good start on this program, but you've forgotten an important point: web ...
Java/j2ee	11/10/2005
Q: what is the data type used to store images in java A: Purushotham - > what is the data type used to store images in java? > Several different object ...
What is the internally difference if I read data as bytes, characters, string and stream?	11/9/2005
Q: Actually I were not very clear those concept, now I am more clear. However, I still need to clear ... A: Izzzz - Okay, these are not difficult questions: > > 1/ Are bytes and stream the same things? > ...
What is the internally difference if I read data as bytes, characters, string and stream?	11/8/2005
Q: I got another question. What is the internally difference if I read data as bytes, characters, ... A: Izzzz - Your question is rather vague. I'll try to give you some information about the differences ...
Since ++ has higher precedence than =, why does the following code print 1 ?	11/6/2005
Q: Since ++ has higher precedence than =, why does the following code print 1 ? ... A: Izzzz - The unary operator '++' has a higher binding precedence than the binary operator '='. ...
Do you know anything about pseudo code?	11/2/2005
Q: I check the link you gave me, those samples are much like a programming language, for example, those ... A: Izzzz - > what is the audience of the pseudo code? can > they understand those operators? > The ...
Do you know anything about pseudo code?	11/2/2005
Q: Do you know anything about pseudo code? is there one pseudo language for each programming language, ... A: Izzzz - > Do you know anything about pseudo code? > Yes, at various points in my career I've had ...
what is the difference between Floating-point numbers and Floating-Point Literals ?	11/1/2005
Q: I know what is Floating-Point Types. but what is the difference between Floating-point numbers and ... A: Izzzz - > what is the difference between Floating-point > numbers and Floating-Point Literals ? > ...
I am waiting for you several days:)	10/28/2005
Q: Two questions for you, 1/ how to print a string in binary? that is , I want print out such as ... A: Izzzzz, Sorry this answer is late, I was away on a business trip. Anyhow, both of your questions ...
not using blue j	10/28/2005
Q: im learning java in blue j and because of its design no main method is required ie you dont use ... A: Dominic, Unfortunately, your code had expired from RAFB.NET before I started working on your ...
java	9/11/2005
Q: great! how do I create a place for a user to enter in a word? rebeccaI am so stumped! I am a ... A: Rebecca, > > how do I create a place for a user to enter in a word? > You don't have to, the code ...
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: Rebecca, Looking at the code, it seems that all you have to do is fill in one method: ...
testing	9/6/2005
Q: Do you have any tips on where I might add code to test the getDistance and BreadthFirstSearch ... A: Loz - > > Do you have any tips on where I might add > code to test the getDistance and ...
string question	9/5/2005
Q: I thought that 'pass by reference' and s+=¡±world!¡± change s's value to "Hello world", why does the ... A: Izzzz, In the code, you've passed a reference to a String object to modify() method. We'll call ...
String comparison	9/2/2005
Q: I will try the code. I am wondering if there are any web sites with sample codes that I can take a ... A: Jacques, > > I am wondering if there are any web sites > with sample codes that I can take a look ...
String comparison	9/1/2005
Q: I am new in Java (JDK 5.0) programming and I have a problem that I am trying to solve. Basically, I ... A: Jacques, > > The problem I am having is to find a way to compare > the string entered by the user ...
Loading software onto web site.	8/24/2005
Q: My name is Jason Sullivan. I have developed a GPS tracking device that I would like to allow people ... A: Jason, It sounds like there are two parts to your system: a server part that does back-end ...
design pattern	8/22/2005
Q: 1.which design pattern is used when the entity bean is in tx,but it commited to passivated and then ... A: Sreedhar, Well, I'm no expert on design patterns, but I'll try to answer your questions. > 1.which ...
using jar files	8/19/2005
Q: Background: I am new to java and have questions regarding jar files. I am working with a bundle of ... A: Steve, First, you are correct that you would need to add a Main-Class: statement to your manifest. ...
which books or site to look for?	8/19/2005
Q: i m a teacher. i am actually planning to add a link to my school's already existing file which wud ... A: Shalini, I don't quite understand what you want to do; but it sounds like you want to give ...
Java Script mouseover not functioning on Linux server	8/16/2005
Q: I looked at the things you suggested but didn't immediately see conflicts such as those you ... A: Tony, Well, the Javascript code you've got looks pretty dense. I can see what it is doing to some ...
Java Script mouseover not functioning on Linux server	8/15/2005
Q: I have inherited a website to manage, and it had always worked fine before both on and offline. Now ... A: Tony, Well, I'm not nearly as good with the Javascript scripting language as I am with the Java ...
Web Application Development	8/13/2005
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: Nik, > I could not find the source code for the example > you told me. Could you please provide ...
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: Nik, Certainly you can do this with Java, although it won't be trivial. You can also do it with ...
an InputStreamReader can convert 8 bit text to UNICODE.	8/4/2005
Q: An article says "an InputStreamReader can convert 8 bit text to UNICODE. An OutputStreamWriter does ... A: Izzz, > An article says "an InputStreamReader can convert > 8 bit text to UNICODE. An ...
Since only a single copy of each method exists, why do we need to declare static methods?	8/3/2005
Q: Since only a single copy of each method exists, why do we need to declare static methods? Thanks, ... A: Izzzz - Static methods are fundamentally different from normal methods, even though only one copy ...
Core java	8/2/2005
Q: if you're instantiating a Subclass object and if the Superclass constructor calls a method that is ... A: Sumit, > if you're instantiating a Subclass object and if > the Superclass constructor calls a ...
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: Shyamal, > > i'm facing a problem that i have to copy java > structure to C structure and C ...
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: Gerard, You've made a fair attempt at this exercise, but you've got some problems. The line ...
adjacent repeating letters	7/3/2005
Q: Some words have adjacent repeating letters. For example, the word “tomorrow” has a double ‘r'. In ... A: Gerard, This is not an especially difficult program, but there are lots of tricky bits that you ...
How to be a good programmer?	7/2/2005
Q: I hope you are doing fine and well. Neil, i am 23 years old. I even graduated with the Computer ... A: Chris, If you really want to be programmer, it just takes dedication and practice. If you don't ...
jdbc query	6/27/2005
Q: i want to write a sql query which will return say nth highest salary from a table with schema. ... A: Divya, I'm not a great SQL programmer, but I'll take a try: 1. Use the following query: ...
Sub programs in Java	6/17/2005
Q: Neal I made a programa that does 4 things: query of a table Insert a record to a ... A: Willy, I'm not sure what you are asking. Do you want to split your code into 5 separate Java ...
InputStream and OutputStream.	6/15/2005
Q: Considering the sentence "the sender will use an OutputStream, while the receiver uses an ... A: Izzzz - > Considering the sentence "the sender will use > an OutputStream, while the receiver uses ...
InputStream and OutputStream.	6/15/2005
Q: I always confuse the usage of InputStream with OutputStream. 1/We usually read from an InputStream, ... A: Izzzz - > > 1/We usually read from an InputStream, right? > Yes, an InputStream is for Java code ...
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: Maki, If your teacher wrote the class in the simplest way, you don't have to do anything special ...
How to use super keyword in main method ?	6/1/2005
Q: How to use super keyword in main method to call super class method if super class method is not ... A: Izzzz - > > How to use super keyword in main method to call > super class method if super class ...
I was wondering that "super" in Java refers to the immediate parent or parent's parent ?	5/31/2005
Q: I was wondering that "super" in Java refers to the immediate parent or parent's parent ? Thanks, ... A: Izzzz - The keyword super generally refers to the type of the immediate parent class. However, ...
Download files using java.net package	5/31/2005
Q: I am trying to download the files from any site using java.net package but it is not working. I am ... A: Prakash, Part of your code is correct, but the part that deals with web proxy address is wrong. ...
How to use the new Java Collections Framework?	5/24/2005
Q: I found Java Collections Framework has been changed, for example, class Vector has been changed to ... A: Izzzz - You can still use the Collections framework in exactly the same way as you always have. ...
changin the appearance of a string	5/18/2005
Q: i see updating the string was what was required. my next problem however is that i have a way of ... A: Dominic, Hmmm, this might be a little easier if I could see all of your code, but I'll try. In ...
changin the appearance of a string	5/17/2005
Q: im currently making a game of hangman whilst learning java my current problem is that if i have a ... A: Dominic, The problem is that you are rebuilding the display[] array each time from the String ...
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: Robert, The hashCode() method merely needs to return an int, such that the int always has the ...
About path or autoexec.bat	4/26/2005
Q: Neal I did install succesfully Java. Directory Sun/appserver ...has 6000 files...200sub ... A: Willy, There are two possible problems here: 1. You installed the wrong thing - it sounds ...
objects and equality	4/18/2005
Q: my question is simple and straightforward: how do you compare objects for equality? to make my ... A: CSCIstudent - There are two kinds of equality for Java object references: 1. whether two ...
java	4/17/2005
Q: I would like to ask about a Java homework assignment I can't solve. : Develop a Java application ... A: Ava, Well, this assignment doesn't sound too difficult. Let's look at it piece by piece. > ...
main class	4/6/2005
Q: im having a problem using net beans (java jdk) making a game of hangman. The problem is that when i ... A: Dominic, > > when i try to run any code it says that no > main class is found > There are two ...
Probably trivial for you..	4/6/2005
Q: Sir, Below is a copy / paste from part of my program. A class contains the following methods to use ... A: Sebastian, Well, there are a couple of problems with your code. I'm not sure how the data returned ...
I have two questions on access modifiers,	4/5/2005
Q: I have two questions on access modifiers, 1/ Why do we need class modifier since I think class ... A: Izzzz - > > Why do we need class modifier since I think class > member modifier is enough? Class ...
newline blues FIXED	4/4/2005
Q: arghhh! sorry I was being very dumb - ignore my previous email! I had forgotten to actually assign ... A: Dafydd, Well, you figured it out yourself. Very good. Your scheme is basically okay, as long as ...
What is the difference between implicit conversion and casting?	4/2/2005
Q: What is the difference between implicit conversion and casting? Thanks, lzzzz A: Izzzz, > > What is the difference between implicit > conversion and casting? > Casting is an ...
about null in HashMap and Hashtable	4/2/2005
Q: I saw on JDK API doc the statement "The HashMap class is roughly equivalent to Hashtable, except ... A: Izzzz - The value 'null' is a legal object reference that refers to no object. It is perfectly ...
Networking	3/31/2005
Q: I am doing on a project(I am a student),titled network Monitoring software.I thought java would be ... A: Yonas - Java is a reasonable choice for most, but not all, network monitoring projects. Java ...
accessing a linux machine thru a java program on windows client	3/9/2005
Q: how do i access a linux machine's file system or linux machine simply thru a java program running on ... A: Shivas, I'm having trouble understanding some parts of your question. You don't want to simply give ...
bytecode	3/6/2005
Q: how are you? would you please explain about bytecode? why does java use it? goodbye A: Saeedeh - Bytecode is an important aspect of the Java virtual machine. It allows Java programs ...
programming for beginners...	2/21/2005
Q: :) I am just a beginner in programming with java, and sometimes I try to begin with my ... A: Hanif, Well, I've done partial solutions for each of these problems so you can see what they would ...
Help with these methods	2/9/2005
Q: can you show me how to create a method that finds the sum of rows and places it in an array, with ... A: Bajanisi, > > can you show me how to create a method that finds the sum of rows and places it in an ...
Projections Questions.	2/9/2005
Q: I hope you are doing well. Neil, i've a problem, which i asked you before also. Actually, the ... A: Jules, Sadly, there are quite a few problems in your code. I was able to get it working with ...
Do we need to specify JDK class path when we compile a class like the following?	2/7/2005
Q: Do we need to specify JDK class path when we compile a class like the following? C:\temp>javac ... A: Izzzz, > > Do we need to specify JDK class path when we > compile a class like the following? ...
Java app slow loading	1/21/2005
Q: Neal, Hi ! I have a web server running a number of sites. I also use a java drop-down menu on a few ... A: Ian, I understand why your Java-based menu applet is slower and more troublesome on SSL-secured web ...
Exception in Code.	1/21/2005
Q: last question. Neil, i've tried to use Java 2D but i'm getting really a strange exception, i would ... A: Jules, I tried looking at the code, but had some trouble getting it to work. Your page did not ...
I need to go from Visual Basic knowledge to Java.	1/20/2005
Q: Well I know Visual Basic but I have to learn Java and I have to learn it now! But the most basic ... A: Justin, I don't know of any good converters to go from Visual Basic to Java. The two languages are ...
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: Coffy, Your question is too vague. There are many ways to create a chat program in Java, I would ...
Image to BufferedImage Conversion	1/19/2005
Q: I hope you are doing fine. Neal, i am looking for a quick reply about a query. You might have ... A: Jules, > 1. How can we convert an "Image" type > to BufferedImage type for saving. Well, ...
Why doesn't the following code print Equal?	1/18/2005
Q: I know implicit conversion will happens when we use + with string (probably call toString()) and ... A: Izzzz - Implicit conversion to String only happens for the + operator, as described in sections ...
Audio comparison in Java	1/18/2005
Q: I'd like to ask some questions about voice recognition and sound comparison. I am trying to write a ... A: Burak, What you are attempting to do is not easy. You can use the Java Media Framework (JMF) to ...
Why doesn't the following code print Equal?	1/17/2005
Q: Why doesn't the following code print Equal? I was thinking b1.toString() should be called ... A: Izzzz - > Why doesn't the following code print Equal? Because b1 is a different kind of object ...
byte and int java type	1/16/2005
Q: I was thinking the only difference between the byte and int java type is that byte uses less memory ... A: Izzzz - > > I was thinking the only difference between the byte and > int java type is that byte ...
inner class and anonymous class	1/14/2005
Q: I cannot find a summary of definition/restriction of inner class and anonymous class, so I deduce it ... A: Izzzz - Well, your three rules are correct, but not complete. There are actually some additional ...
rolldice	1/13/2005
Q: which method to write the application for rolldice I have sample for rolling die, and try to add ... A: Henry, If I cannot see the code, then I cannot tell why it would not work to add another die. ...
static link and dynamic link in Java?	1/12/2005
Q: I was thinking library or class link in Java, is there static link in Java like C++, I think there ... A: Izzzz - There is no such thing as static linking in conventional Java, because all JVMs are ...
Java need help	1/11/2005
Q: What different between extends and implements A: AZ - > > What different between extends and implements > Java uses the "extends" keyword for class ...
about java applet	1/7/2005
Q: how can i run a java applet in Win CE ? how can i search and modify data from txt file? thanks ... A: Bill, > > how can i run a java applet in Win CE ?? > I'm no expert on WindowsCE. However, I do ...
Can't we declare variable insdie while like for loop?	1/6/2005
Q: We can declare variable inside for loop as follows, but it seem that compiler don't like we declare ... A: Izzzz - We can declare a variable in the leading part of a for() loop because the syntax allows ...
where does the output of Runtime.getRuntime().exec("ls -l") go?	1/5/2005
Q: The code as follows, I wonder where the output go? I can't see any output in the shell. ... A: Izzzz - The output of the command doesn't go anywhere, with the code you've written. When you ...
Exception Error please help	1/2/2005
Q: I am working on image processing in Java. I was writing a simple application which can gray-scale an ... A: Jules, Thanks for sending your code, it made analyzing the problem easier. Anyway, it took me a ...
java	1/1/2005
Q: ...im new to pcs need to know about java....so what is java...my pc was give to me and there is ... A: Doug, Java is a programming language that can be used to write applications and web applets. You ...
Can we use unsigned with primitive type like in C++?	12/30/2004
Q: Can we use unsigned with primitive type like in C++? Thanks, lzzzz A: Izzzz - > > Can we use unsigned with primitive type like in C++? > No, Java has no unsigned ...
Difference Between Synchronised Method and Synchronised Object	12/30/2004
Q: I am designing a method to update the Collection Object. How can i avoid the deadlock situation. ... A: Anoop, The simplest way to avoid deadlock is to make all the methods of your object synchronized. ...
I want to know whether or not System.exit(0) and finally can be used together?	12/29/2004
Q: I want to know whether or not System.exit(0) and finally can be used together? I didn't find the ... A: Izzzz - No, System.exit(n) and finally cannot be used together. The System.exit() method calls the ...
Is there a standard way to implement out parameter in Java?	12/21/2004
Q: Is there a standard way to implement out parameter in Java? Thanks lzzzz A: Izzzzz - You've asked me this question three times now. Is my answer insufficient for you? ...
about jini	12/19/2004
Q: please let me know about the basic concept behind JINI. Thank you. A: Hemalatha, JINI is a framework for distributed network services and service discovery. It ...
java security	12/17/2004
Q: My question is that i have been asked to develop a obfuscator tool in java that helps to ... A: Shivas, Well, to obfuscate Java code, you need at least three facilities: (1) a package that can ...
I try to ask you again, I don't receive any response for last two question.	12/16/2004
Q: Why doesn't operator + and byte work together? by default, + only returns int ? Thanks, lzzzz A: Izzzz - The + operator, when applied to anything but strings, acts as a binary numeric operator. ...
Question	12/14/2004
Q: could I write a code to prevent anyone to read my messages in the mobile using JAva, unless they ... A: Dima, I'm sorry, I do not understand your question. Do you want to encrypt and decrypt text ...
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: Roose, Yes, there are many different Java decompiler tools. The best of them can take a Java ...
Java networking	12/11/2004
Q: Is it necessary for a java client to know the port of the server to communicate with the server ? A: Narayan, I think I hit the wrong button, sorry. Anyway, your question was: > Is it necessary for ...
java beginner	12/9/2004
Q: i am a beginner to java. i have compiled several simple programmes (like HelloWorld etc) copying ... A: Ravindra, > ...it compiles but gets the error > exception in thread main noclassdeffounderror This ...
I thought I already ask you this question,but I don't get respose, maybe system problem	12/8/2004
Q: How to implement an out parameter in java? can you give me an example code? thanks a lot lzzzz A: Izzzz - There is no language facility in Java for 'out' parameters -- all parameters in Java are ...
hai I am new to java.Will...	12/6/2004
Q: hai I am new to java.Will U please Tell me some sites from where I can get the codings for java so ... A: Faizal, There are many good sites for Java beginners. Start with the official Java tutorial: ...
multiplatform application	12/5/2004
Q: I'm a multimedia programmer and currently I involved in courseware development project. In this ... A: Nurbahyah, If you are developing courseware using MX2004, then you should be coding your ...
I am sorry to have two questions,	12/3/2004
Q: I am sorry to have two questions, How to implement an out parameter in java? If for example, 25 ... A: Izzzz - There is no language facility in Java for 'out' parameters -- all parameters in Java are ...
java and rss news feeds for my web site	11/30/2004
Q: . I'm not so much a technical person, but can usually figure things out enough to cut and paste, and ... A: Bill, There are several Java applications out there to read and display RSS. For example, ...
Getting the Client IP in Certificates using keytool	11/30/2004
Q: I am developing a Client / Server Java Application. I am using SSL encryption using keystores both ... A: Sandeep, If you are writing a client/server application using SSL Sockets ...
corejava	11/29/2004
Q: what is difference between instance variable and reference variable A: Kumara, An instance variable is a field or member variable of an object. For example, in the ...
Nice to meet you again:)	11/10/2004
Q: Somebody said, access modifier is class level, not object level. what does that mean? How is access ... A: Izzzz - Access modifiers apply to all the instances of a class, not to individual instances. If a ...
none	10/14/2004
Q: I guess you are right about building the mail_server that could collate and present all mails to the ... A: Meera, > I want to write a java software program that will > do parallel computing. Well, Java ...
build 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: Meera, > > i am planning to build a small mail server that will > collate all the different mails ...
About Java font object	10/12/2004
Q: I wanted to write java application. Within that I want to use my customized font. That font should ... A: Rajesh, It is possible to use custom fonts in Java 1.3 and later. The key method you need is the ...
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: Mahmoud, The simplest way to make your icon file path work in this case is to use a File object. ...
package fields, class state, etc ...	10/11/2004
Q: I was reading the documentation for the interface serializable and I came across some terms, that I ... A: Adrien, These are fairly simple questions, although I can see why the explanations might seem ...
get hardware static and dynamic info	9/29/2004
Q: I want to know how can I get hardware(cpu,hard disk ,..)information using java programming language; ... A: Paria, There is no portable way for a Java program to obtain real-time system information. Some ...
Network Game?	9/27/2004
Q: Let me start by descibing what I am trying to do. The idea is to create a boggle style game that can ... A: George, > ...description of game... > My goal is to automate it to the point that I start > the ...
java error	9/23/2004
Q: I'm a beginner and currently learning Java right now.I'm following the tutorial "Your First Cup of ... A: Chovster, Yeah, is kind of problem is a big pain, especially on Windows where folks aren't ...
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: Callisto, This is a fairly simple problem, in your method compare(). You need to do two things: ...
void function	9/22/2004
Q: Can you please tell me how to print the output dirently from the getAddress() from the Address ... A: Callisto, In the code you've sent, there is no output because the method getAddress() never gets ...
Use of time	9/21/2004
Q: I tried using the GregorianCalendar class in java but it returns the entire ... A: Jian Carlo, The GregorianCalendar has the ability to return all the date information as a String, ...
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: Vijai, > > How can I prevent anyone from downloading it and > decompiling the class file? > There ...
I wan to learn java	9/14/2004
Q: I am just learning java.I have some knowledge of Html but java is very new to me.I remeber learing ... A: Tony, If you've only programmed with HTML and Javascript, I can see why you would be confused. The ...
Interface 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: Sagar, Sorry, but this isn't really possible from Java. Communicating with other applications ...
on core java	9/13/2004
Q: im new to java.i got a doubt that why should the class name and program name need to be same? A: Ram, A Java class must be defined in a file of the same name when the class is declared public. ...
learning java	8/23/2004
Q: hai neal, i would like to teach java myself.could you please sugest me the web resourses ... A: Kiran, The best place to start is the official Java tutorial, here: ...
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: Morteza, There are several different good ways for two Java applications to share information over ...
local variable vs. instance variable and instance variable vs. static variable	8/17/2004
Q: I've just had a thought - the relationship of local variable vs. instance variable and the ... A: Izzzz - Well, they are similar in that local variables have a narrower scope than instance ...
java input databases	8/16/2004
Q: how to input database using table, and get field databases to form? and give me web for source code A: Zai, I do not understand your question. To use databases in Java, you need to use the JDBC ...
How to do serialization in java?	8/15/2004
Q: With the following code fragment, I have three questions, 1/ myLinkedList is null, why is ... A: Izzzz - Okay, these are simple questions. > 1/ myLinkedList is null, why is buffer.length equal ...
How to do serialization in java?	8/14/2004
Q: sorry to trouble you again. As to the two statements below, I was wondering why you closed the oos ... A: Izzzz - > As to the two statements below, I was wondering > why you closed the oos first? > > ...
How to do serialization in java?	8/12/2004
Q: There are two follow up questions, 1/ Do the following two statements write object in memory? ... A: Izzzz - > 1/ Do the following two statements write object in memory? > ByteArrayOutputStream baos = ...
How to do serialization in java?	8/12/2004
Q: How to do serialization in java? Thanks, lzzzz A: Izzzz - Serialization in Java is done in two separate ways. 1. Core Java Serialization The core ...
I got two interview questions, could you please help?	8/11/2004
Q: I got two interview questions, could you please help? 1/ why can a constructor not be inherited? 2/ ... A: Izzzz - Okay, I can answer these pretty easily. > > why can a constructor not be inherited? > ...
hello sir how are you...	8/9/2004
Q: how are you tell me about something about java api and structure of java api and guide me from ... A: Gaurav, The Java API documentation is available here: http://java.sun.com/j2se/1.4.2/docs/api/ The ...
Making a game	7/26/2004
Q: ok, a few friends and i are designing and creating a MMORPG.....and were wonder how great of ... A: Mortamus, Java can actually present pretty sophisticated graphics, but until recently Java's ...
Packet sniffing and editting	7/26/2004
Q: On an online java game, where data is stored on a server....it sends and recieves data packets. I ... A: Mortamus, It is perfectly feasible to change the data on the way to your client; a good proxy ...
CALENDAR	7/25/2004
Q: Sir, I have to write a program that will take an input from a user Console.Sir how can i get the ... A: Nizam, It is perfectly feasible to print a calendar as your describe, using Java. The code that ...
Enumeration and Iterator	7/24/2004
Q: I am not clear about Enumeration and Iterator, are they similar or totally different? what are they ... A: Izzzz - java.util.Enumeration and java.util.Iterator are both interfaces. Objects that implement ...
What API is used to sort collection?	7/23/2004
Q: How about map, can we sort a map? Thank you so much, lzzzzHi, How about sorting an array, an array ... A: Izzzz - > > How about map, can we sort a map? > Well, yes, but in a couple of different ways. A ...
What API is used to sort collection?	7/22/2004
Q: How about sorting an array, an array is not called collection, right? Thanks, lzzzzHI, I got an ... A: Izzzz - > How about sorting an array, an array is not > called collection, right? > Correct, an ...
What API is used to sort collection?	7/21/2004
Q: I got an interview question, he asked "What API is used to sort collection?" Thank you, lzzzz A: Izzzz, There are a couple of possible answers to this. 1. The java.util.Collections class has a ...
Why cannot the following code be compiled?	7/19/2004
Q: Why cannot the following code be compiled? --------------------------------- public class Test { ... A: Izzzz, The problem with this code is that it is ambiguous. The compiler does not know which ...
Question	7/19/2004
Q: Sir I want to ask some detail about the topic. The topic is, "What in your opinion, is ... A: Imran, Native assembly languages are used only for specialized programming. Today, even most ...
i need to develop a small...	7/11/2004
Q: i need to develop a small application on LDAP (Light Weight Directory Access Protocaol) to access, ... A: Saurabh - Well, I have not worked with SunONE Directory Server nor with Win2003 Active Directory, ...
Application using LDAP	7/11/2004
Q: I am working on LDAP (Lightweight Directory Access Protocol) and have to create an application in ... A: Varun, The Java API for accessing directories (including LDAP directories) is called JNDI. It ...
id number	7/10/2004
Q: I am a newbie trying to write applications for the mobile phone. I understand that one has to ... A: Harry, The basic Java programming framework for mobile phones and other small devices is called ...
I have a question on polymorphism	7/9/2004
Q: I have a question on polymorphism, in c++, that base class pointer point to subclass object is ... A: Izzzz - Yes, this is one form of polymorphism. Java supports several ways in which polymorphism ...
Why can we write statement after catch block?	7/8/2004
Q: Why can we write statement after catch block? I think a program will stop executing after exception, ... A: Izzzz - > > Why can we write statement after catch block? > Why not? A catch block is just a ...
What is exactly difference bwtween a class method and an instance method ?	7/7/2004
Q: What is exactly difference bwtween a class method and an instance method ? Thanks, lzzzz A: Izzzz - A class method is a static method, it is declared with the keyword 'static' and called by ...
I found that we can not write constructor, super and this in an interface, is it because interface can not initialized?	7/5/2004
Q: I found that we can not write constructor, super and this in an interface, is it that because ... A: Izzzz - > > we can not write constructor, super and this in > an interface, is it that because ...
should I declare result as instance variable or local variable?	7/2/2004
Q: A method as follows, should I declare result as instance variable or local variable? if local, after ... A: Izzzz, > > should I declare result as instance variable > or local variable? > In the example ...
What is the difference between the following two way of creating object?	7/1/2004
Q: What is the difference between the following two way of creating object? ... A: Izzzz - You asked about two ways of creating objects: Approach 1: Object o; o = new ...
About Learning Java.	6/29/2004
Q: I am being very new to Java, by looking at your profile, it made me some sense that you are very ... A: Jules, Well, there are a lot of approaches to learning Java: reading books, taking classes, ...
Somebody said that we can use reflection instead of passing heavy object over network. I don't understand how reflection can help ?	6/27/2004
Q: Somebody said that we can use reflection instead of passing heavy object over network. I don't ... A: Izzzz - > > Somebody said that we can use reflection instead > of passing heavy object over ...
After Class.forName(Test), do we have to call Class.netInstance(),	6/25/2004
Q: After Class.forName(Test), do we have to call Class.netInstance(), or something else? Anyway I don't ... A: Izzzz, The statement Class theClass; theClass = Class.forName("Test"); retrieves the Class ...
Why can I call an abstract method as follows?	6/23/2004
Q: Why can I call an abstract method as follows? ------------------------- DocumentBuilder builder = ... A: Izzzz - You can call the newInstance() method of the abstract DocumentBuilderFactory class because ...
Nice to see you here again	6/21/2004
Q: I don't understand the following statements, could you please help? Where is there two : ? ... A: Izzzz, Okay, the way to understand this expression is to look at evaluation order and precedence. ...
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: Jason, There is no way to read an image from (or write an image to) a socket. You must use the ...
search engine	5/15/2004
Q: I need search engine code!!!! Please , can you find me search engine code for me to download. I got ... A: Bob, This question is a little out of my scope. There is some web search and full-text search ...
java	5/13/2004
Q: sir can u kindly tell me about which is better either visual C++ for j2ee i am just starting my ... A: Tapan, Visual C++ and J2EE are both good programming platforms to learn, but they are good for ...
JAVA HELP!!!!!!!!!!	5/11/2004
Q: hey neil i really appreciated your help, i've been voting for you and nominating as well! its ... A: Mark, Okay, you are making progress. Once you have the string from the TextField, you need to ...
JAVA HELP!!!!!!!!!!	5/9/2004
Q: hey man, so far im progressing good with my program. i've been able to easily create 3 random ... A: Mark, The code you have is pretty close to workable code, but it is not very flexible. (Also, ...
Why can't we put static variables into a method, even the method is static?	4/28/2004
Q: Why can't we put static variables into a method, even the method is static? ... A: Izzzz - > > Why can't we put static variables into a method, > even the method is static? > The ...
java servlet; record visitor time on page	4/27/2004
Q: I found your site through a google search. Basically, I'm a beginner and trying to find a ... A: David, I see what you are trying to do, but it is not possible in general, from the server, to ...
JAVA HELP!!!!!!!!!!	4/27/2004
Q: 1) JBuilder3 (for java) hey, i was told your really smart with java, im in a first year course so ... A: Mark, Okay, this is not a difficult problem. The right way to solve it is to create a method ...
Only variables within a method in Java and C++ are called local variables, right?	4/26/2004
Q: Only variables within a method in Java and C++ are called local variables, right? Thanks, lzzzz A: Izzzz - > > Only variables within a method in Java and > C++ are called local variables, right? ...
polymorphism	4/25/2004
Q: What is meant by run time polymorphism? A: Mahu, In a programming language, polymorphism is the situation where a particular expression or ...
OOP concepts	4/25/2004
Q: What is meant by abstraction? I want exact definition with a real time example? A: Madhu, Abstraction is the hiding of information behind other, usually simpler, information. In ...
When I enter (ctrl + D), the jvm will terminate. why?	4/24/2004
Q: When I enter (ctrl + D), the jvm will terminate. why? Thanks, lzzzz A: Izzzz - That seems strange to me. On Windows and Unix, Ctrl+C will terminate most programs when ...
servlets	4/24/2004
Q: I've never writen a servlet before and would like to try. 1. What does a servlet do exactly? 2. How ... A: Nicholas, > > I've never writen a servlet before and would like to try. > That's good, servlets ...
java	4/22/2004
Q: We can write multithreading program by extending "Thread Class" or by implementing "Runnable" ... A: Mgana, Both ways of writing threaded programs are good. 1. Extending the class ...
java	4/15/2004
Q: What is the use of interface? A: Maru, A Java interface is a means for specifying some methods that an object must supply, or to ...
java	4/15/2004
Q: What is constructor and virtual function? Can we call a virtual function in a constructor? A: Maru, > > What is constructor and virtual function? > A constructor is a special kind of function ...
java	4/12/2004
Q: Why file name in java should be similar to class name? A: Mgana, The source code filename and the class name must be the same, for any public Java class. If ...
double value	3/30/2004
Q: yes that was what I was after. The methods work fine in exception of small/large numbers. is there ... A: Nguyen, > > The methods work fine in exception of small/large > numbers. is there a way to say ...
Screen Resolution in Java	2/29/2004
Q: I wanted to ask a question in respect to the screen resolution in java. Whenever we run anything in ... A: Prof, Your code probably won't work, because you never set the position of the Window. You ...
concat two strings	2/28/2004
Q: how to concat two strings using exceptions.It should take only characters. A: Prashant, I don't quite understand what this question is about. You cannot concatenate two strings ...
Why are constructors/descructors not inherited?	2/28/2004
Q: Why are constructors/descructors not inherited? Thanks, lzzzz A: Izzzz - In one weak sense, Java constructors are inherited. If you had the following code ...
When I write a statement below, will the compiler load all classes within the package, or only search for a specific class?	2/21/2004
Q: When I write a statement below, will the compiler load all classes within the package, or only ... A: Izzzzz, The directive "import javax.xml.*;" does not cause the compiler to load anything. It ...
Biometrics	2/18/2004
Q: I am a final year computer engineering student from India. I am doing my project in Biometrics. ... A: Kumar, Well, this question is rather outside my area. I don't have any Java biometrics code to ...
What is the difference about synchronize between case 1 and 2 ?	2/17/2004
Q: What is the difference about synchronize between case 1 and 2 ? ----------------------------------- ... A: Izzzz - In your particular code, there is not much difference between case 1 and case 2. Both of ...
class access modifier and method access modifier	1/22/2004
Q: If the class access modifier is not public, even though its' method access modifier is public, the ... A: Izzzz - > > If the class access modifier is not public, even though > it's method access modifier ...
what does the following sentence mean?	1/21/2004
Q: what does the following sentence mean? ------------------------------- By using static factory ... A: Izzzz, > By using static factory methods, an API can return > objects without making their classes ...
As I know, there are only threads in java. I was wondering if there are processes in java, and how to create a process in java?	1/20/2004
Q: As I know, there are only threads in java. I was wondering if there are processes in java, and how ... A: Izzzz - Java has threads and multi-threading as part of the core language. Java can also support ...
I found I can create an object with the name same as its class, should we usually do likt that?	1/18/2004
Q: I found I can create an object with the name same as its class, should we usually do likt that? ... A: Izzzz - Yes, this is permitted, because local variables and member variables are in a different ...
What different purposes do 'class access modifier' and 'member access modifier' serve respectively,	1/17/2004
Q: Exceuse me, I am not very clear What different purposes 'class access modifier' and 'member access ... A: Izzzz - Class access modifiers affect whether a class can be accessed by code from outside its own ...
Are there copy constructor and assignment constructor in java?	1/12/2004
Q: Are there copy constructor and assignment constructor in java? Thanks, lzzzz A: Izzzz - > Are there copy constructor and assignment > constructor in java? > There is such a ...
Java Applet Question	1/12/2004
Q: I would like to call a javascript function from a java applet. I have been able to get this to ... A: Keith, Your code basically looks okay. First, be sure you are including the MAYSCRIPT ...
Why does 'System.out.println(i1.equals(i2));' output true, but ' System.out.println(t1.equals(t2));' output false?	12/28/2003
Q: Why does 'System.out.println(i1.equals(i2));' output true, but ' System.out.println(t1.equals(t2));' ... A: Izzzz, > > Why does 'System.out.println(i1.equals(i2));' output > true, but ' ...
Merry Christmas!	12/27/2003
Q: When should we use abstract class, and when should we use interface? Thanks, lzzzz A: Izzzz - Java interfaces and abstract classes both provide a mechanism for specifying some ...
Is the method overloading polymorphism ?	12/14/2003
Q: Is the method overloading polymorphism ? if so, then the polymorphism in java means different ... A: Izzzz - Well, method overloading is one form or one facet of polymorphism, but it is not the core ...

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