Code not working, anyone know why?

Question

I'm making a simple pong game, and it's important to me that I use JAVA as efficient as possible (that is, use object orientated stuff, mostly). So, for drawing the ball and the players, I had thought up the following steps:
- the applet has an array list that contains drawables*
- if the ball and players need to be drawn, the applet uses a for-each loop, wich will call the draw(Graphics g) of all the drawables in the array list.
* interface, guarantees that the method public void draw(Graphics g) is pressent.
This is how I programmed it:
http://willhostforfood.com/access.php?fileid=32821
Only problem is, it doesn't work. The method paint() of the applet should result in "Hello World" being drawn on the screen (I know this seems like an eleborate method, but using seperate objects will help organise things once I have like, 20 - 30 balls on screen), but it doesn't.
Does anyone know why it is not working?

Answer 1

Here ya go, this is something I did quite a while ago, knock yourself out:
package RandomColor;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.awt.Image;
import java.awt.image.MemoryImageSource;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;
import java.awt.Point;
import java.awt.Toolkit;
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.util.Random;
public class RandomColor extends JFrame implements MouseListener, MouseMotionListener, MouseWheelListener{
  private BufferedImage myImage = null;
  private Canvas myCanvas = null;
  private Color bgColor = Color.BLACK;
  public RandomColor() throws java.lang.Exception {
    super();
    setUndecorated(true);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setBackground(bgColor);
    Dimension myDimension = Toolkit.getDefaultToolkit().getScreenSize();
    setSize(myDimension);
    setMinimumSize(myDimension);
    JPanel myJP = new JPanel();
    myJP.setBackground(bgColor);
    Dimension dImage = new Dimension(this.getAccessibleContext().getAccessibleComponent().getSize());
    myCanvas = new Canvas();
    myCanvas.addMouseListener(this);
    myCanvas.addMouseMotionListener(this);
    myCanvas.addMouseWheelListener(this);
    myCanvas.setSize(dImage.width, dImage.height);
    myJP.add(myCanvas);
    add(myJP);
// start of code to hide the cursor   
    int[] pixels = new int[16 * 16];
    Image image = Toolkit.getDefaultToolkit().createImage(new MemoryImageSource(16, 16, pixels, 0, 16));
    Cursor transparentCursor = Toolkit.getDefaultToolkit().createCustomCursor(image, new Point(0, 0), "invisiblecursor");
    getContentPane().setCursor(transparentCursor);
// end of code to hide cursor   
    pack();
    setVisible(true);
    Random myR = new Random();
    myImage = new BufferedImage((int) (dImage.getWidth()+0.99), (int) (dImage.getHeight()+0.99), BufferedImage.TYPE_INT_RGB);
    int i = myImage.getWidth();
    int j = myImage.getHeight();
    Ball[] myBall = {new Ball(), new Ball(), new Ball()};
    for (int k=0; k<myBall.length; k++){
      myBall[k].setBackGroundColor(Color.BLACK);
      myBall[k].setBounds(0, i, 0, j);
      myBall[k].setRandomColor(true);
      myBall[k].setLocation(myR.nextInt(i), myR.nextInt(j));
      myBall[k].setMoveRate(32, 32, 1, 1, true);
      myBall[k].setSize( 289, 167);
    Graphics g = myImage.getGraphics();
    while(true) {
      for (int k=0; k<myBall.length; k++){
        g.setColor(myBall[k].fgColor);
        g.fillOval(myBall[k].x, myBall[k].y, myBall[k].width, myBall[k].height);
      invalidate();
      paint(getGraphics());
      for (int k=0; k<myBall.length; k++){
        g.setColor(myBall[k].bgColor);
        g.fillOval(myBall[k].x, myBall[k].y, myBall[k].width, myBall[k].height);
        myBall[k].move();
  public void mouseClicked(MouseEvent e){
    exit();
  public void mouseDragged(MouseEvent e){
//    exit();
  public void mouseEntered(MouseEvent e){
//    exit();
  public void mouseExited(MouseEvent e){
//    exit();
  public void mouseMoved(MouseEvent e){
//    exit();
  public void mousePressed(MouseEvent e){
    exit();
  public void mouseReleased(MouseEvent e){
    exit();
  public void mouseWheelMoved(MouseWheelEvent e){
    exit();
  private void exit(){
    System.exit(0);
  public void paint(Graphics g){
    super.paint(g);
    myCanvas.getGraphics().drawImage(myImage, 0, 0, null);
  public static void main(String[] args) throws java.lang.Exception {
    new RandomColor();
    System.out.println("Done -- RandomColor");
}Ball Class:
package RandomColor;
import java.awt.Color;
import java.util.Random;
public class Ball {
  private int iLeft      = 0;
  private int iRight     = 0;
  private int iTop       = 0;
  private int iBottom    = 0;
  private int moveX      = 1;
  private int moveY      = 1;
  private int xScale     = moveX;
  private int yScale     = moveY;
  private int xDirection = 1;
  private int yDirection = 1;
  private boolean moveRandom = false;
  private boolean colorRandom = false;
  private Random myRand = null;
  public Color fgColor = Color.BLACK;
  public Color bgColor = Color.BLACK;
  public int x = 0;
  public int y = 0; 
  public int width  = 1;
  public int height = 1;
  public Ball(){
    myRand = new Random();
    setRandomColor(colorRandom);
  public void move(){
    x = 5 + x + (xScale*xDirection);
    y = 5 + y + (yScale*yDirection);
    if(x<=iLeft){
      x = 0;
      if(moveRandom) xScale = myRand.nextInt(moveX);else xScale = moveX;
      xDirection *= (-1);
      if(colorRandom) setRandomColor(colorRandom);
    if(x>=iRight-width){
      x = iRight-width;
      if(moveRandom) xScale = myRand.nextInt(moveX);else xScale = moveX;
      xDirection *= (-1);
      if(colorRandom) setRandomColor(colorRandom);
    if(y<=iTop){
      y = 0;
      if(moveRandom) yScale = myRand.nextInt(moveY);else xScale = moveY;
      yDirection *= (-1);
      if(colorRandom) setRandomColor(colorRandom);
    if(y>=iBottom-height){
      y = iBottom-height;
      if(moveRandom) yScale = myRand.nextInt(moveY);else xScale = moveY;
      yDirection *= (-1);
      if(colorRandom) setRandomColor(colorRandom);
  public void setColor(Color c){
    fgColor = c;
  public void setBackGroundColor(Color c){
    bgColor = c;
  public void setBounds(int Left, int Right, int Top, int Bottom){
    iLeft   = Left;
    iRight  = Right;
    iTop    = Top;
    iBottom = Bottom;
  public void setLocation(int x, int y){
    this.x = x;
    this.y = y;
  public void setMoveRate(int xMove, int yMove, int xDir, int yDir, boolean randMove){
    moveX       = xMove;
    moveY       = yMove;
    moveRandom  = randMove;
    xDirection  = xDir;
    yDirection  = yDir;
  public void setRandomColor(boolean random){
    colorRandom = random;
    switch (myRand.nextInt(3)+1){
      case 1:  fgColor = Color.BLUE;
               break;
      case 2:  fgColor = Color.GREEN;
               break;
      case 3:  fgColor = Color.RED;
               break;
      default: fgColor = Color.BLACK;
               break;
  public void setSize(int width, int height){
    this.width  = width;
    this.height = height;
}