Slow mouseDragged callbacks in java 1.6.0_10, works fast in prior releases?

Question

I have this program that draws a selection rectangle by xor-ing a rectangle on the screen following the mouse cursor when clicked. In jre's before 1.6.0_10, this runs fast, but in 1.6.0_10 it runs like dog. I've used this code with JRE's from 1.5 to 1.6.0_07 and it was just fine. And if I switch back in eclipse, it is fast again. Here is a striped down version of the code that illustrates the problem. Any ideas, or is this just a performance issue with 1.6.0_10?
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.event.KeyListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
// This class is used to track the mouse and to
// draw a rectangle that follows the pointer.
// In Java 1.6.0_07 (and before) this is very fast, but in 1.6.0_10
// this is very slow.....
public class TestMotion implements MouseMotionListener, MouseListener, KeyListener {
     protected Component parent;
     protected Rectangle startRect;
     protected Point     startMovePt = null;
     protected Point     previousPt = null;
     protected int       width;
     protected int       height;
     protected int       minWidth = 0;
     protected int       minHeight = 0;
     protected boolean   paintedFlg = false;
     public static void main(String [] args) {
          JFrame frame = new JFrame("Test Window");
          JPanel panel = new JPanel();
          panel.setLayout(null);
          new ClickWatcher(panel);
          frame.setContentPane(panel);
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          frame.setSize(new Dimension(800,600));
          frame.setVisible(true);
     private static class ClickWatcher implements MouseListener {
          private JPanel ourPanel;
          private ClickWatcher(JPanel panel) {
               ourPanel = panel;
               panel.addMouseListener(this);
          public void mouseClicked(MouseEvent e) {
          public void mouseEntered(MouseEvent e) {
          public void mouseExited(MouseEvent e) {
          public void mousePressed(MouseEvent e) {
               new TestMotion(ourPanel,e.getX(),e.getY());
          public void mouseReleased(MouseEvent e) {
     public TestMotion(Component control,
                         int x, int y) {
          this.parent = control;
          startRect = new Rectangle(x,y,0,0);
          this.minWidth = 0;
          this.minHeight = 0;
          parent.addMouseListener(this);
          parent.addMouseMotionListener(this);
          parent.addKeyListener(this);
          parent.requestFocus();
     protected void draw(Graphics g,int x,int y,int cx, int cy) {
          g.drawRect(x,y,cx,cy);
     public void mouseDragged(MouseEvent e) {
          int x = e.getX();
          int y = e.getY();
          System.out.println("Mouse Dragged to ("+x+","+y+")");
          Graphics g = parent.getGraphics();
          g.setColor(Color.black);
         g.setXORMode(Color.white);
         if (previousPt != null) {
              if (paintedFlg == false)
                   draw(g,previousPt.x,previousPt.y,width,height);
              paintedFlg = false;
         } else {
              previousPt = startRect.getLocation();
         int newX = previousPt.x;
         int newY = previousPt.y;
         int newHeight = height;
         int newWidth = width;
          if (x < startRect.x) {
               newX = x;
               newWidth = startRect.x - x;
          } else {
               newX = startRect.x;
               newWidth = x - startRect.x;
          if (y < startRect.y) {
               newY = y;
               newHeight = startRect.y - y;
          } else {
               newY = startRect.y;
               newHeight = y - startRect.y;
          if (newWidth < minWidth) {
              newWidth = minWidth;
         if (newHeight < minHeight) {
              newHeight = minHeight;
         Dimension maxSize = parent.getSize();
         if ((newX+newWidth) >= maxSize.width) {
              newWidth = maxSize.width - newX - 1;
         if ((newY+newHeight) >= maxSize.height) {
              newHeight = maxSize.height - newY - 1;
         if (newX < 0) {
              newWidth += newX;
              newX = 0;
         if (newY < 0) {
              newHeight += newY;
              newY = 0;
         previousPt = new Point(newX,newY);
         width = newWidth;
         height = newHeight;
         draw(g,previousPt.x,previousPt.y,
                width,height);
         g.dispose();
     public void mouseMoved(MouseEvent e) {
     public void mouseClicked(MouseEvent e) {
     public void mouseEntered(MouseEvent e) {
     public void mouseExited(MouseEvent e) {
     public void mousePressed(MouseEvent e) {
     public void mouseReleased(MouseEvent e) {
          cleanup1();
         cleanup2();
          e.consume();
     public void keyPressed(KeyEvent e) {
     public void keyReleased(KeyEvent e) {
     public void keyTyped(KeyEvent e) {
          if (e.getKeyChar() == KeyEvent.VK_ESCAPE) {
               cancel();
     private void cleanup1() {
          Graphics g = parent.getGraphics();
          g.setColor(Color.black);
         g.setXORMode(Color.white);
         if (previousPt != null) {
              draw(g,previousPt.x,previousPt.y,width,height);
         g.dispose();
     private void cleanup2() {
         previousPt = null;
          parent.removeMouseListener(this);
          parent.removeMouseMotionListener(this);
          parent.removeKeyListener(this);
     public void cancel() {
         cleanup1();
         cleanup2();
     // We need to know when paint is called so we don't
     // try and clear our old xor rectangle.
     public void paint() {
          paintedFlg = true;
}

Answer 1

Thank you! That solved the problem.No it doesn't, because to make your application work properly on all computers D3D would have to be disabled whenever your application is used. I would look for a way to do what you want without using XOR mode.