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Hi,

Thanks for your quick reply. However, how to detect if user clicks the cross (to close) window so as to use the System.exit() which u suggested?

I have taken to an applet instead. There are...

import java.awt.*;
import java.awt.event.*;

public class Balls extends Frame {
Graphics gBuffer;
Image image;
public static void main(String[] args){
Balls f = new Balls();...