Java Bouncing Balls Thread Problem

I have created a program that shows a ball bouncing off walls using a single thread but want to be able to run more than one ball at a time using multiple threads. I have tried using 'extends thread' and 'implements runnable' but have only ended up confusing myself more.. any ideas??

This is my code so far

Driver

class BallDriver extends Thread

{

	public static void main(String[] args) 

	{

		Bounce app = new Bounce();

		//Ball ball = new Ball();

		//Thread t = new Thread(app);

	}

}

Bounce Class

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.border.*;



public class Bounce extends JFrame implements MouseListener

{

	private JPanel canvas;

	private JPanel buttonPanel;

	private Ball ball;

	private int x=0, y=0, xCoord, yCoord;

	

	public Bounce()

	{

		setTitle("Bounce");

		Container contentPane = getContentPane();

		canvas = new JPanel();

		contentPane.add(canvas, "Center");

		buttonPanel = new JPanel();

					

			

			

		LineBorder line = new LineBorder(Color.black);

		buttonPanel.setBorder(line);

		contentPane.add(buttonPanel, "South");

		setSize(300, 300);

		setVisible(true);

		

		canvas.addMouseListener(this);

	}

	

		

	public void mouseClicked(MouseEvent e)

	{	

		ball = new Ball(canvas);                     // create a ball

		//Thread t = new Thread(ball);

		//t.start();

		//gets co ordinates from where mouse is clicked

		x = e.getX();

		y = e.getY(); 

		//gives co ordinates to ball object

		ball.setXCoord(x); 

		ball.setYCoord(y);

			

		ball.bounce();


	}


	public void mousePressed(MouseEvent e) {}

	public void mouseReleased(MouseEvent e) {}

	public void mouseEntered(MouseEvent e) {}

	public void mouseExited(MouseEvent e) {}

	

	

} // end class Bounce

Ball Class

import java.awt.*;

import javax.swing.*;

public class Ball implements Runnable

{

	private JPanel box;

	private static final int XSIZE = 20;	

	private static final int YSIZE = 20;	

	private int x = 0;							

                private int y = 0;							

                private int dx = 2;							

                private int dy = 2;							

	

	public Ball(JPanel b) 

	{

		box = b; 

	}//end Ball


	public void setXCoord(int XIn)

	{x=XIn;}// end setXCoord

	public void setYCoord(int YIn)

	{y=YIn;}// end setYCoord






	public void draw() 

	{

		Graphics g = box.getGraphics();

		g.fillOval(x, y, XSIZE, YSIZE);

		g.dispose();

	}//end draw


	public void move() 

	{

		Graphics g = box.getGraphics();

		g.clearRect(x, y, XSIZE, YSIZE);

		x += dx;

		y += dy;

		Dimension d = box.getSize();


		if (x < 0)

		{ 

			x = 0; dx = -dx;

		}


		if (x + XSIZE >= d.width)

		{ 

			x = d.width - XSIZE; dx = -dx; 

		}


		if (y < 0)

		{

			y = 0; dy = -dy;

		}


		if (y + YSIZE >= d.height)

		{ 

			y = d.height - YSIZE; dy = -dy; 

		}

		

		g.setColor(Color.red);

		g.fillOval(x, y, XSIZE, YSIZE);

		g.dispose();

	}//end move


	public void bounce()

	{

		draw();

		for (int i = 1; i <= 1000; i++) 

		{

			move();

			

			try

			{ 

				Thread.sleep(5); 

			}

			catch(InterruptedException e) {}

		}

	}//end bounce


	public void run()

	{

		try

		{

			for (int k=0; k < 10; k++) 

			{

			

			bounce ();

			Thread.sleep((long)(Math.random() * 1000));

			

			} //for

		}

		catch (Exception e)

		{

		}

	}


} // end class Ball