Help, Application does not Close!

[iitbpd1962]

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();
		f.setSize(200,200);		
		f.addWindowListener(new WindowAdapter(){
			public void WindowClosing(WindowEvent e){
				System.exit(0);
			}
		}
		);
		extracted(f);		
	}
	private static void extracted(Balls f) {
		f.show();
	}
	public void paint(Graphics g){
		image = createImage(getSize().width, getSize().height);
		gBuffer = image.getGraphics();
		gBuffer.setColor(Color.black);
		gBuffer.fillRect(10, 10, getSize().width-30, getSize().height-10);
		g.drawImage(image, 10, 10, this);
		g.setColor(Color.red);					
		dropBall(g);
	}
	
	public void dropBall(Graphics gr){
		int i;
	while(true){
		for(i=20;i<getHeight()-20;i++){
			gr.setColor(Color.red);
			gr.drawOval(getWidth()/2, i, 10, 10);
			Sleep(10);
			gr.setColor(Color.black);
			gr.drawOval(getWidth()/2, i, 10, 10);
		}
		for(;i>20;i--){
			gr.setColor(Color.red);
			gr.drawOval(getWidth()/2, i, 10, 10);
			Sleep(10);
			gr.setColor(Color.black);
			gr.drawOval(getWidth()/2, i, 10, 10);
		}
	}
	}
	
	public void Sleep(long amount){
		try{
			Thread.sleep(amount);
		}
		catch(Exception e){}
	}
	
	public void update(){
		repaint();
	}
}

[Moshambi]

I have used system.exit(); to make my Java programs close before. Just insert in wherever you want it to close the program and it should work. If it oesnt work try putting a 0 or a 1 in the parentheses. Hope that helps!

[iitbpd1962]

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 problems with the ball collision detection code. Do view it and let me know if there are any (simple) solutions.

http://www.geocities.com/iit_bpd1962/applets/balls.html

nk