Applet using JVM 1.5.0_06 causes GDI Object Leaks

Question

Hi,
Since the release of 1.5.0_06 our applet has developed a GDI Object leak. Basically, our applet draws on a panel when ever an update is available. The previous versions of the JVM seem fine and th e GDI Objects are stable, but this new version eats the GDIs up really quickly, and never releases them.
The problem occurs when the applet repaints itself. Calling repaint() or paint() from code works ok with no leaks but as soon as the applet is forced to repaint because of a resize, or because another window has moved over it the GDIs go up by multiples of 10.
Here is some sample code:
import java.awt.*;
import java.applet.*;
import java.util.Date;
* <p>Copyright: Copyright (c) 2005</p>
* <p>Company: </p>
* @author not attributable
* @version 1.0
public class GDIApplet extends Applet {
    //Construct the applet
    public GDIApplet() {
    //Initialize the applet
    public void init() {
        try {
            jbInit();
        } catch (Exception e) {
            e.printStackTrace();
    //Component initialization
     private void jbInit() throws Exception {
         this.setLayout(new BorderLayout());
         this.add(new GDIPanel(), BorderLayout.CENTER);
     public class GDIPanel extends Panel implements Runnable{
    public GDIPanel() {
        Thread t = new Thread(this,"SPGPaintTimer");
        t.start();
    public void paint(Graphics g){
        if( g == null){
            return;
        System.out.println("Paint on thread: " + Thread.currentThread().getName());
        Date d = new Date();
        Rectangle bounds = getBounds();
        g.setColor(Color.black);
        g.fillRect(0,0, bounds.width, bounds.height);
        FontMetrics fm = g.getFontMetrics();
        String val = d.toString();
        int width = fm.stringWidth(val);
        int height = fm.getHeight();
        int x = (bounds.width - width) /2;
        int y = (bounds.height/2) - height;
        g.setColor(Color.yellow);
        g.drawString(val,x,y);
    public void run(){
        while(true){
            try {
                Thread.sleep(1000);
            } catch (InterruptedException ex) {
            repaint();
}

Answer 1

Hi there.
I've found this page by googling.
I am not a Java developer, but am using a third party java applet on my web page for mapping.
Funnily enough, I've been trying to hunt down a memory leak thats occuring in IE (not any other browser).
It only occurs when the applet is physically visible on the page, and the user is using the Sun JVM (1.5.0_06). The GDI object count increases every time I mouseover a link in a tree.
This does not occur with the MS JVM.
Unfortunately I do not have access to the applet source code, but I'm wondering if its related to your problem.
Have you had any success on this?
Thanks.