boxbounce3 no really!

import java.awt.*;
import java.awt.geom.*;
import java.lang.Number;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Random;

/**
 * Class BallDemo - provides two short demonstrations showing how to use the
 * Canvas class.
 *
 * @author Michael Kolling and David J. Barnes
 * @version 2006.03.30
 */

public class BoxBounce
{
    private Canvas myCanvas;
    private ArrayList <BouncingBall> ballResevoir;
    private Random resevoirCapacity;
    private Random randomXPos;
    private Random randomYPos;
    private Random randomBallSize;
    private int width;
    private int height;
    private int boxWidth;
    private int boxHeight;

    /**
     * Create a BallDemo object. Creates a fresh canvas and makes it visible.
     */
    public BoxBounce(int width, int height)
    {
        myCanvas = new Canvas("Box Bounce", width, height);
        myCanvas.setVisible(true);
        this.width = width;
       this.height = height;

    }

    /**
     * Demonstrate some of the drawing operations that are
     * available on a Canvas object.
     */
    public void drawDemo()
    {
        myCanvas.setFont(new Font("helvetica", Font.BOLD, 14));
        myCanvas.setForegroundColor(Color.red);

        myCanvas.drawString("We can draw text, ...", 20, 30);
        myCanvas.wait(1000);

        myCanvas.setForegroundColor(Color.black);
        myCanvas.drawString("...draw lines...", 60, 60);
        myCanvas.wait(500);
        myCanvas.setForegroundColor(Color.gray);
        myCanvas.drawLine(200, 20, 300, 50);
        myCanvas.wait(500);
        myCanvas.setForegroundColor(Color.blue);
        myCanvas.drawLine(220, 100, 370, 40);
        myCanvas.wait(500);
        myCanvas.setForegroundColor(Color.green);
        myCanvas.drawLine(290, 10, 320, 120);
        myCanvas.wait(1000);

        myCanvas.setForegroundColor(Color.gray);
        myCanvas.drawString("...and shapes!", 110, 90);

        myCanvas.setForegroundColor(Color.red);

        // the shape to draw and move
        int xPos = 10;
        Rectangle rect = new Rectangle(xPos, 150, 30, 20);

        // move the rectangle across the screen
        for(int i = 0; i < 200; i ++) {
            myCanvas.fill(rect);
            myCanvas.wait(10);
            myCanvas.erase(rect);
            xPos++;
            rect.setLocation(xPos, 150);
        }
        // at the end of the move, draw once more so that it remains visible
        myCanvas.fill(rect);
    }

    public void drawBox()

    {
       int cHeight = new Double(myCanvas.getHeight()).intValue();
       int cWidth =  new Double(myCanvas.getWidth()).intValue();
       int boxHeight = (cHeight - cHeight/2);
       int boxWidth = (cWidth -cWidth/2);
       Rectangle frame = new Rectangle(20, 20, boxWidth, boxHeight);
         myCanvas.fill(frame);
        myCanvas.wait(200);
         myCanvas.eraseRectangle (40, 40, boxWidth-40, boxHeight-40);
         this.boxWidth = boxWidth;
         this.boxHeight = boxHeight;
        }



    /* Simulate two bouncing balls
     */

   public int setballXPos()
   {
       int ballXPos = randomXPos.nextInt(boxWidth-20);
       if (ballXPos > 40 & ballXPos < boxWidth - 40)
        {
       System.out.println("ball xpos " + ballXPos);
       return ballXPos;
    }

    else
    {
        setballXPos();
    }
    return ballXPos;
}

    public int setballYPos ()
    {
        int ballYPos = randomYPos.nextInt(boxHeight-20);
        System.out.println("ball ypos " + ballYPos);
        return ballYPos;
    }

    public void bounce()
    {
        int ground = 400;   // position of the ground line

        myCanvas.setVisible(true);

        // draw the ground
        myCanvas.drawLine(50, ground, 550, ground);

        BouncingBall ball = new BouncingBall(setballXPos(), setballYPos(), 16, Color.blue, ground, myCanvas);
        ball.draw();
        BouncingBall ball2 = new BouncingBall(70, 80, 20, Color.red, ground, myCanvas);
        ball2.draw();


        // make them bounce
    boolean finished =  false;
        while(!finished) {
            myCanvas.wait(50);           // small delay
            ball.move();
            ball2.move();
            // stop once ball has travelled a certain distance on x axis
            if(ball.getXPosition() >= 550 && ball2.getXPosition() >= 550) {
                finished = true;
            }
        }
        ball.erase();
        ball2.erase();




    }

}