Tiling a background image

[Ken Miller]

I have an app that extends JFrame in which I add a JDesktopPane, and in that
I have a
couple of JInternalFrames that I use.  In the main winow of the app (the
content pane of the JFrame if I am correct) I would like to put a tiled
image to serve as the background.  I thought I was doing it correctly, but
nothing shows up.  I created an ImagePanel class that extends JPanel, which
is listed below.

I create a panel of the ImagePanel type and added it to the content
pane of JFrame (in the constructor of my app) by doing the following:
    ImagePanel imagePanel = new ImagePanel();
    imagePanel.setVisible(true);

    Container content = getContentPane();
    content.add(imagePanel);

I then go on to add the desktop and the internal frames.  This doesn't seem
to work. Is there a flaw in my understanding on how to do this?

Thanks in advance.

Ken

class ImagePanel extends JPanel
{
  private Image image;

  public ImagePanel()
  {
    image = Toolkit.getDefaultToolkit().getImage("foobar.gif");
    MediaTracker tracker = new MediaTracker(this);
    tracker.addImage(image,0);
    try
    {
      tracker.waitForID(0);
    }
    catch (InterruptedException exception)
    {
    }
  }

  public void paintComponent(Graphics g)
  {
    super.paintComponent(g);

    int imageWidth = image.getWidth(this);
    int imageHeight = image.getHeight(this);

    g.drawImage(image, 0, 0, null);

    // tile the image

    for(int i = 0; i * imageWidth <= getWidth(); i++)
    {
      for(int j = 0; j * imageHeight <= getHeight(); j++)
      {
        if (i + j > 0)
        {
          g.copyArea(0,0,imageWidth,imageHeight,i*imageWidth,j*imageHeight);
        }
      }
    }
  }
}

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