Java calls repaint to much (100% CPU)

Question

Hello,
I'm creating an emulator, and the image to display is created with an ImageProducer. Now, I have this code:
public class Video extends JPanel {
    private int a;
    private Image screen;
    private Lcd lcd;
    private Dimension lcdDimension;
    private int scale;
    private int scaleFactor = 3;
    /** Creates a new instance of Video */
    public Video() {
        lcd = new Lcd(64, 32);
        lcdDimension = lcd.getDimension();
        screen = createImage(lcd);
        setScale(2);
   public void paint(Graphics g) {
        System.out.println(a++);
        screen.flush();
        g.drawImage(screen, 0, 0, lcdDimension.width*scale*scaleFactor, lcdDimension.height*scale*scaleFactor, Color.WHITE, this);
    public Dimension getPreferredSize() {
        return new Dimension(lcdDimension.width*scale*scaleFactor, lcdDimension.height*scale*scaleFactor);
    public Lcd getLcd() { return lcd; }
    public void setScale(int s) { scale = s; }
    public int getScale() { return scale; }
}The problem is, as soon as I open the menu and close it (I don't click on anything, no code should be executed), java starts repainting the Video frame like mad...
I can see the number count go up on the standard output with about 200 / second...

Answer 1

i dont know if this will work but try putting this code in ur class and put private Graphics dbg; at the top
public void update(Graphics g)
          if (dbImage == null)
              dbImage = createImage (this.getSize().width, this.getSize().height);
              dbg = dbImage.getGraphics ();
          dbg.setColor (getBackground ());
          dbg.fillRect (0, 0, this.getSize().width, this.getSize().height);
          dbg.setColor (getForeground());
          paint (dbg);
          g.drawImage (dbImage, 0, 0, this);
      }