Hjæælp har problemer med double-buffering

Der er et ret godt eksempel her:

http://www.realapplets.com/tutorial/DoubleBuffering.html

Hvis du ikke selv kan rette det til kan jeg evt hjælpe?

Følgende tegner et baggrundsbillede, samt indsætter et nyt billede på baggrunden ved klik

import java.applet.Applet;
import java.awt.Graphics;
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.Iterator;

public class ImageApplet extends Applet implements MouseMotionListener,MouseListener 
{

    // The object we will use to write with instead of the standard screen graphics
    Graphics bufferGraphics;
    // The image that will contain everything that has been drawn on
    // bufferGraphics.
    Image offscreen;
    Image background, someImg;
    // To get the width and height of the applet.
    Dimension dim;
    int curX, curY,clicks;
    ArrayList images;

    public void init() 
    {
          // We'll ask the width and height by this
          dim = getSize();
          // We'll redraw the applet eacht time the mouse has moved.
          addMouseMotionListener(this);
          addMouseListener(this);
          setBackground(Color.black);
          // Create an offscreen image to draw on
          // Make it the size of the applet, this is just perfect larger
          // size could slow it down unnecessary.
          offscreen = createImage(dim.width,dim.height);
          // by doing this everything that is drawn by bufferGraphics
          // will be written on the offscreen image.
          bufferGraphics = offscreen.getGraphics();
          background = loadImage("background.jpg");
          someImg = loadImage("little.jpg");
          images = new ArrayList();//used to store images
    }

      public void paint(Graphics g) 
    {
          // Wipe off everything that has been drawn before
          // Otherwise previous drawings would also be displayed.
          bufferGraphics.clearRect(0,0,dim.width,dim.width);
          bufferGraphics.setColor(Color.red);
         
          // draw the rect at the current mouse position
          // to the offscreen image
          bufferGraphics.drawImage(background, 0, 0, null);//background
          for(Iterator i = images.iterator();i.hasNext();)
          {
              ImageData imgdata = (ImageData)i.next();
              bufferGraphics.drawImage(someImg, imgdata.getX(),imgdata.getY(), null);//background
          } 
          bufferGraphics.fillRect(curX,curY,20,20);
          //draw all images in list
         
         
          // draw the offscreen image to the screen like a normal image.
          // Since offscreen is the screen width we start at 0,0.
          bufferGraphics.drawString(""+clicks,10,10);
          g.drawImage(offscreen,0,0,this);
    }

    // Always required for good double-buffering.
    // This will cause the applet not to first wipe off
    // previous drawings but to immediately repaint.
    // the wiping off also causes flickering.
    // Update is called automatically when repaint() is called.

    public void update(Graphics g)
    {
          paint(g);
    }
 
          // Necessary for RealMedia to load your images
    public Image loadImage(String file) 
    {
            return getImage(getCodeBase(),file);
    }
 

    // Save the current mouse position to paint a rectangle there.
    // and request a repaint()
    public void mouseMoved(MouseEvent evt) 
    {
          curX = evt.getX();
          curY = evt.getY();
          repaint();
    }
 

    // The necessary methods.
    public void mouseDragged(MouseEvent evt) 
    {
    }

   
    public void mouseClicked(MouseEvent e)
    {
        images.add(new ImageData(e.getX(),e.getY()));
        clicks++;
        repaint();
       
    }
    public  void mouseEntered(MouseEvent e){}
    public  void mouseExited(MouseEvent e) {}
    public  void mousePressed(MouseEvent e) {}
    public  void mouseReleased(MouseEvent e)  {}
}

//til at gemme koordinater

public class ImageData
{
    private int x;
    private int y;
   
    public ImageData(int x,int y)
    {
        this.x = x;
        this.y = y;
       
    }
   
    public int getX()
    {
        return x;   
    }
   
    public int getY()
    {
        return y;   
    }
}

//html
<html>
<body>
hello
<APPLET CODE=ImageApplet.class WIDTH="200" HEIGHT="200">
</APPLET>

This tag tells the browser
</body>
</html>

takker, send lige et svar så jeg kan lukke spørgsmålet :)

svar