Hi,Does anybody know the difference between ClassNotFoundException and NoClassDefFoundError..?Thanks,Den.

Hi all,I need to know how to write Java code to start-up the Java Web-Start application remotely on the desktop of a user! How would one go about doing this?!thanx...

i need tftp client and server implemented in java. please help me.

HiI am trying out something in threads and wanted to know something.If i am doing some X processing 4 times and it takes 16 sec. Say for each X process i spawn a thread would it mean that all threads will be execute in 4 sec and not 16 sec. Would the time get divided by 4. If not generally by ...

hi all,I have one class A inside the package test and another class B which is stored in the same level as test. Now class B imports the test package and instantiates an object of A. I am getting compilation error during compilation of class B. class structure is shown below.package test;Class ...

Im currently trying to get few a java worksheets but im stuck and cant resolve the problemim not sure where the error is :/*** Write a description of class PhoneCalc here.* * (Abol Akrami) * */public class PhoneCalc{private double[] Prices = new double[ 10 ];private String[] ProductCodes = new ...

How does one then go about overloading a contructor of the main class have the object called in the main method, say:public class ShadeArea //extends whatever{ public ShadeArea() {// Structure the layout of the app. here } public ShadeArea(Locale locale) // overloaded contructor {locale = ...

Hello!I would like to write a program about Mobility. That's, a mobile user roam from one area to another.If the mobile user's IP address doesn't match the new subnet's IP address (for example, the user IP address is a.a.a.x, the subnet address of new area is b.b.b.x) can the user send ...

can someone tell me what im doing wrong, cuz frankly i dont see it....int dirStartIndex = 0;int dirEndIndex = 0;String directory= "Object/new folder/";String dirTabber= null;dirEndIndex = directory.indexOf("/");while(dirEndIndex != -1){System.out.println("enter st " + dirStartIndex + " ed " + ...

I've done a html parser using javax.swing.text.html.parser.ParserDelegator, but can't remove the style sheet. How? thanks

How to seperate a html file into a few text files? thanks

I had made one connection pool.The problem is that when the size of the pool reaches the maximum limit the calling thread should wait until the connection is release by other.So how can i make the calling thread to wait unitl the connection is released.

Hello, I have a simple program, for which the compilation is good, but when I run it I have the error message below:Exception in thread "main" java.lang.NullPointerExceptionat java.applet.Applet.getCodeBase(Applet.java:136)at Projection.init(Projection.java:19)at ...

Ok I found the beginning of the solution myselfnow I have this prog:import java.io.*;import java.lang.*;import java.util.*;import java.awt.*;import java.applet.*;class ImageShow extends Applet{private Image myimage;public void ...

Hello All,I am ins great confussion regarding this error.I get this exception when i try doing some thing like this.//codeint i,j - 0;int k = i/j;this can be understood that it will be giving exception as I am trying to divide it by zero.consider the same code again//codedouble i,j=0;double k = ...

Hi All,Have two questions.a) In Java a static function can not refer any data in an object - because it has no object. To understand better about this it would be great if anyone can explain what happens behind the scenes if Object.Member Function() is called.2) main is also a static function. ...

Hi!I have a window (JFrame) which shows up with a certain dimension (decided by frame.pack() ).I'd like to let the user be able to resize it (it does by default), making the window bigger, not smaller than the initial dimension.Is there a way (Listener, attribute, ecc..) to do that?Can you ...

I was at a friends house recently, and as I was running a program I was making, he decided to show me something he found on the net. It was a program called Crash-it!Guess which program he decided to crash with it? You got it, my Java program!He dragged the bomb onto it and, sure enough, boom! ...

Hello everyone, I am trying to compile a calculator GUI but keep on getting the same erros. Please if anyone has any advice I would greatly appreciate it. THESE ARE THE ERRORS: calculatorframe.java:150: '(' expectedpublic void OpActionListener implements ActionListener^calculatorframe.java:7: ...

i use jBuilder and i generated a .jar file for an application. but when running, the images can not be load. the .jar contain the images under a subdirectory named 'images'.in the code source, i used the method getResource() but always i have the same problem.

Hi all,I have found a strange behaviour in my java VM (1.3.1_07 Sun)Consider the following CodeClass serviceClass = null;try{serviceClass = Class.forName(tmp[0]);}catch (ClassNotFoundException e){logger.error(e);return false}Now if the class i request is not found, everything is ok. I get the ...

Hi,I was wondering if someone can give some hints. ;-)First: For each declared and implemented Class, I need a file. Is this right?Second: If for each Class I need a file, how can I tell to the complier to include the other file or the implementation? If I try to construct an object with my ...

hi allI am having the directory structure likeWEB-INF classescomcil cimInside this com.cil.cim, i am having a java file name Util.javaInthat i am reading a properties file name x.propertiesThis x.properties file resides in classes directory.Why i am not able to read x.properties file inside a ...

Hello the JDK 1.1.3 can not be download no more can somebody send it to my box : (jdk1.1.3 for window NT 4.0)akrichephilippe@yahoo.frThank you very much

What are hardware requirements for desktop applications in j2se, with UI javax.swing classes

Hi,Does somebody know how to figure out if a file is being read or written by another program?One of my colleagues is writing a file manipulating utility and before he does something with a file he wants to know whether that file is being read/written by another program which can be any program ...

Can any one guide me to print colored characteres in System console?.I am starting many processes in my application and i want to show green OK for successfully started processes and i want to show red FAILED for failed processes.Please let me know is the above could be possible with java?Any ...

Hi,I would be very grateful if someone can tell me how to go for locking the windows folder or the desktop...through a java program.With regardsPinju

I am working on a Java program for a PDA Touchscreen editor, but the actionListner is not working.The program is running but none of the keys are working on the user interface.

Hi does anyone know how i could make the titlebar disappear?because i would like to make a new titlebar under the original titlebar(that is disappeared) so that i could show chinese characters in the new titlebar.Xu

Hi,I have a Jdialog that it has a KeyAdapter associated. (This KeyAdapter handles the key F1) In this JDialog, i have a JTable, and when i am editing a column, i want to listen to the key F1, when i press. I have put another KeyAdapter for this JTable, and i can listen all keys less F1,...F9. ...

Hi allI'm trying to set some values within a byte array to zeros. Using a simple for loop to do that was quite simple,but it taks a significant amount of time specially if the array size increase. I was wondering if there is a way in java to get better execution time.Here is a part of the code ...

I am using this code just to write into a textboxprivate class TextFieldHandler implements ActionListener //line85{public void actionPerformed(ActionEvent ...

Hi,can anyone have the code for refreshing the client's browser from server side with out setting the timer . U can do this by setting the Timer from server. but we need some other solution for this problem.Thanks.

Hi, I'm working with web services on Windows 98 with J2SDK 1.4.1. There is a remote method that take some file as parameters: -if the client used a byte[][] to pass the file he has a java.lang.OutOfmemory -if while the client used MimeMultipart and as parts he put the files, go all OK! Why? ...

How I can run c++ function from static JAVA! I would appreciate very much your responses!!

Given a system's IP address, is there a way to find it's hostname using pure Java? I'm hoping there is a port that can be sent a request, or something similar.I have tried searching the web and these forums but cannot find any information on this topic.thanks for your ...

Hi!I'm working on a FTPClient and would like to store files on a FTP-Server. My Programm does save txt-files. But when it comes to store mp3 files it stores them in a wrong manner (file on server has the same size but I can't play it anymore - and the mp-player requests different codec). I'm ...

Hi,Me and two friends have developped a simple music transposer as a final assignment this year, and we've run into a couple of problems, namely a NullPointerException in the drawing of the notes. For some reason, even though the values are showing up in the Transposer class (main class), the ...

i done a login based chat program but there is a bug and i don't understand why...when i enter my nickname the first time with a already logged on nickname...it can popup a dialog telling me that this nickname is taken..but when i enter the nickname the second time...it will not popup the ...

Ok, I did a test program to see whether or not this would work because im having trouble with this loop(Im relatively new to programming).import java.io.*;import java.util.*;public class test{public static void main (String [] args){KeyboardReader reader = new KeyboardReader(); String answer; ...

Hi,I'm having a problem referencing an array by a double.I've created a 4d array called a.I'd like to reference the array by a[1.1][1.2][1.3][1.4] = someValue.However, when I run the code I get an error stating : found Double, required Int.double[][][][] a = new double[50][50][50][50];double ...

please help me!!!!/* File: WeatherForecaster.java* Authors: Aaron Schnapp & Andrew Speer* Description: This program creates a GUI which enables a user to input current weather conditions and predicts the future weather forecast. * Date: 6-2-03 (due date)*/import javax.swing.*;import ...

I齧 developing a web server with JSP齭, and I need to move the application to others computers. I need to access to a directory, but I don齮 know it because the user can install the Application in the directory he wants. So I need to access to that directory in the JSP code.The directory is ...

Hello,I have the following situation and I would like to know if it is a bug, a feature (?) of the language specification or I am missing something.I create a class B in my own package (let's say package B) that extents a class A from another package (let's say package A). Now without me ...

Is there a way (using Java) to determine the operating system of a remote host without logging in? Perhaps a port that can be listened to, pinged or otherwise contacted?I've tried searching the forums but found nothing on this subject.The application of this will be to improve a scanner used ...

how can i search for all the *.txt files in my java folderand when found i want to display the name of the filesvery much likedir command in dos

Hi,I have an imaging program that works on a pixel level using greyscale bitmaps, I need to highlight all the pixels that form the centre of a cross, example:001000121000100The pixel labelled 2 is the pixel i am after.. can someone show me how i can do this? I have heard about kernels but they ...

In Java version 1.4.1_02, I expect the following code to draw a line dignally across the screen. Instead, it draws multiple lines when scrolled rapidly.import java.awt.*;import java.awt.geom.*;import javax.swing.*;class MyPanel extends javax.swing.JPanel {public MyPanel() ...

Hi all,I have a unique situation (or so I think). We are running our apps in Citrix servers, such that many users log in to a single citrix server and run our java apps. The problem is, it will be possible that more than one user might use the same app and start to work with the same file.I ...