BallTestTwo.java

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Canvas;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

class BallTestTwo extends Canvas implements Runnable
{
    private Ball ball;

    public BallTestTwo()
    {
        setBackground(Color.WHITE);
        setVisible(true);

        //instantiate a new Ball
        Ball ba = new Ball();

        //test the Ball thoroughly


        //test all constructors


        new Thread(this).start();
    }

    public void update(Graphics window)
    {
        paint(window);
    }

    public void paint(Graphics window)
    {
        ball.moveAndDraw(window);

        if(!(ball.getX()>=10 && ball.getX()<=550))
        {
            ball.setXSpeed(-ball.getXSpeed());
        }

        if(!(ball.getY()>=10 && ball.getY()<=450))
        {
            ball.setYSpeed(-ball.getYSpeed());
        }
    }

   public void run()
   {
    try
    {
        while(true)
        {
           Thread.currentThread().sleep(19);
            repaint();
         }
      }catch(Exception e)
      {
      }
    }
}