BOUNCE CLASS:

import javax.swing.*;

public class Bounce extends JApplet {

	public Bounce(){
		add(new bouncepanel());
		}
	public static void main (String[] args); {
		JFrame win = new JFrame ("Bounce the ball");
		win.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		win.setContentPane(new bouncepanel());

		win.pack();
		win.setVisible(true);
	}

}

BALLINBOX CLASS:


import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class BallInBox extends JPanel {

	private Ball m_Ball    = new Ball(0,0,2,3);

	//instance
	private int   m_interval  = 35;  // Milliseconds between updates.
	private Timer m_timer;           // Timer fires to animate one step.

	public BallInBox() {
		setPrefferedSize(new Dimension(200,80));
		setBorder(BorderFactory.createLineBorder(Color.BLACK);
	}




    public BallInBox() {
    }


}