Ejemplo Java Image observer getImage

import java.awt.*;
import java.applet.*;
/*
  <APPLET
      CODE=iobserver.class
      WIDTH=600
      HEIGHT=150 >
  </APPLET>
*/
public class iobserver extends Applet
{
    Image image;
    public void init()
    {
        image = getImage(getDocumentBase(), "image.jpg");
    }
    public void paint(Graphics g)
    {
        g.drawImage(image, 10, 10, this);
    }
  public boolean imageUpdate(Image img, int flags, int x, int y, int w, int h)
  {
      if ((flags & ALLBITS) != 0) { 
          repaint(x, y, w, h);      
      } 
      return (flags & ALLBITS) == 0;
  }
}