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diff --git a/examples/gnu/classpath/examples/java2d/JNIOverhead.java b/examples/gnu/classpath/examples/java2d/JNIOverhead.java
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+/* JNIOverhead.java - demonstrator for classpath/gcj fillrect performance issue
+   Copyright (C) 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath examples.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA. */
+
+package gnu.classpath.examples.java2d;
+
+import gnu.classpath.examples.swing.DemoFactory;
+
+import java.awt.BorderLayout;
+import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.Graphics;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+import javax.swing.JButton;
+import javax.swing.JCheckBox;
+import javax.swing.JComponent;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.SwingUtilities;
+
+/** 
+ * @author Norman Hendrich
+ */
+public class JNIOverhead
+  extends JPanel
+  implements ActionListener 
+{
+
+  static JNIOverhead fillRectDemo;
+
+  LCDCanvas lcd;
+  Worker worker;
+  JLabel label;
+  JCheckBox translate;
+  JCheckBox lines;
+
+  int     nx = 128;
+  int     ny = 64;
+  int     matrix[][], future[][];
+  int     generation = 0;
+
+  // 20 msec, or 50 repaints per sec (theoretically)
+  int     sleepMillis = 20;
+  long    lastMillis = System.currentTimeMillis();
+
+  boolean enableRepaints = true;
+  
+  /**
+   * If true, test translation.
+   */
+  boolean testTranslation = false;
+  
+  /**
+   * If true, paint lines rather than rectangles
+   */
+  boolean paintLines;
+
+  public void actionPerformed(ActionEvent e) 
+  {
+    if (e.getActionCommand().equals("CLOSE"))
+    {
+      System.exit(0);
+    }
+  }
+
+  public JNIOverhead()
+  {
+    setSize(nx, ny);
+    createContent();
+  }
+
+  public void createContent()
+  {
+    setLayout(new BorderLayout());
+
+    JPanel p = new JPanel(new BorderLayout());
+    lcd   = new LCDCanvas();
+    label = new JLabel();
+    label.setText("not running");
+    
+    translate = new JCheckBox("translate");
+    translate.addActionListener(new ActionListener()
+    {
+      public void actionPerformed(ActionEvent event)
+      {
+        testTranslation = translate.isSelected();
+      }
+    });
+    
+    lines = new JCheckBox("lines");
+    lines.addActionListener(new ActionListener()
+    {
+      public void actionPerformed(ActionEvent event)
+      {
+        paintLines = lines.isSelected();
+      }
+    });
+    
+    JPanel bottom = new JPanel();
+    bottom.add(lines);
+    bottom.add(translate);
+    
+    p.add(lcd, BorderLayout.CENTER);
+    p.add(bottom, BorderLayout.SOUTH);
+    p.add(label, BorderLayout.NORTH);
+    add(p);
+  }
+
+  public void setSize(int _nx,int _ny )
+  {
+    nx = _nx;
+    ny = _ny;
+    matrix = new int[nx][ny];
+    future = new int[nx][ny];
+  }
+
+  public void initFrameContent()
+  {
+    JPanel closePanel = new JPanel();
+    JButton closeButton = new JButton("Close");
+    closeButton.setActionCommand("CLOSE");
+    closeButton.addActionListener(this);
+    closePanel.add(closeButton);
+    add(closePanel, BorderLayout.SOUTH);
+  }
+
+  public void setSleepMillis(int millis)
+  {
+    sleepMillis = millis;
+  }
+
+  public class LCDCanvas extends JPanel
+  {
+    private int   sx, sy;
+    private Color activePixel  = new Color(30, 30, 40);
+    private Color passivePixel = new Color(200, 180, 240);
+    private Color gridPixel    = new Color(255, 240, 240);
+
+    public LCDCanvas()
+    {
+      super();
+      sx = 4 * nx;
+      sy = 4 * ny;
+    }
+
+    public void paintComponent(Graphics g)
+    {
+      // for buffered drawing - not used atm
+      // g.drawImage( buffer, 0, 0, null );
+      long t1 = System.currentTimeMillis();
+
+      g.setColor(gridPixel);
+      g.fillRect(0, 0, sx, sy);
+
+      Color pixelColor = null;
+
+      int dx, dy;
+
+      if (paintLines)
+        {
+          for (int ix = 0; ix < nx; ix++)
+            for (int iy = 0; iy < ny; iy++)
+              {
+                if (matrix[ix][iy] != 0)
+                  pixelColor = activePixel;
+                else
+                  pixelColor = passivePixel;
+
+                dx = 4 * ix;
+                dy = 4 * iy;
+                g.setColor(pixelColor);
+
+                if (testTranslation)
+                  {
+                    g.translate(dx, dy);
+                    g.drawLine(0, 0, 5, 5);
+                    g.translate(- dx, - dy);
+                  }
+                else
+                  g.drawLine(dx, dy, dx + 5, dy + 5);
+              }
+        }
+      else
+        for (int ix = 0; ix < nx; ix++)
+          {
+            for (int iy = 0; iy < ny; iy++)
+              {
+                if (matrix[ix][iy] != 0)
+                  pixelColor = activePixel;
+                else
+                  pixelColor = passivePixel;
+
+                dx = 4 * ix;
+                dy = 4 * iy;
+                g.setColor(pixelColor);
+
+                if (testTranslation)
+                  {
+                    g.translate(dx, dy);
+                    g.fillRect(0, 0, 3, 3);
+                    g.translate(- dx, - dy);
+                  }
+                else
+                  g.fillRect(dx, dy, 3, 3);
+              }
+          }
+
+      long t2 = System.currentTimeMillis();
+
+      label.setText("paintComponent took " + (t2 - t1) + " msec. " + "("
+                    + (nx * ny + 1) + " "
+                    + (paintLines ? "drawLine" : "fillRect") + " calls)");
+
+    }
+
+    public Dimension getPreferredSize()
+    {
+      return new Dimension(sx,sy);
+    }
+
+    public Dimension getMinimumSize()
+    {
+      return new Dimension(sx,sy);
+    }
+  }
+
+  public class Worker extends Thread
+  {
+    public void run()
+    {
+      boolean running = true;
+      while(running)
+        {
+          iteration();
+
+          if (enableRepaints)
+            display();
+
+          if (sleepMillis > 0)
+            {
+              try
+                {
+                  Thread.sleep( sleepMillis );
+                }
+              catch(InterruptedException ie)
+                {
+                  running = false;
+                }
+            }
+        }
+    }
+  }
+
+  /** 
+   * stupid animation algorithm: show binary representation of current
+   * iteration.
+   */
+  public void iteration()
+  {
+    generation++;
+
+    for (int i = 0; i < nx; i++)
+      {
+        long tmp1 = 1L << i;
+        for (int j = 0; j < ny; j++)
+          {
+            // count neighbors
+            long tmp2 = (1L << j);
+
+        
+            long tmp3 = generation & tmp1 & tmp2;
+            if (tmp3 != 0) 
+              matrix[i][j] = 1;
+            else
+              matrix[i][j] = 0;
+          }
+    }
+
+    if ((generation % 100) == 0)
+      {
+        long t = System.currentTimeMillis();
+        //        System.out.println(
+        //           " generation= " + generation +
+        //           " iterations/sec= " + 100.0*1000/(t-lastMillis) );
+        lastMillis = t;
+      }
+  }
+
+  public void display()
+  {
+    lcd.repaint();
+  }
+
+  public static void usage()
+  {
+    System.out.println( 
+      "Usage: <java> FillRect2 [-sleep <millis>] [-size <int>] [-nopaint]\n"
+    + "Example: jamvm FillRect2 -sleep 10 -size 100\n"
+    );
+    System.exit(0);
+  }
+
+  public static void main(String args[])
+    throws Exception
+  {
+    fillRectDemo = new JNIOverhead();
+    for (int i = 0; i < args.length; i++)
+      {
+        if ("-help".equals(args[i]))
+          {
+            usage();
+          }
+        if ("-sleep".equals(args[i]))
+          {
+            fillRectDemo.setSleepMillis( Integer.parseInt(args[i + 1]));
+            i++;
+          }
+        if ("-size".equals(args[i]))
+          {
+            int size = Integer.parseInt(args[i + 1]);
+            fillRectDemo.setSize(size, size);
+            i++;
+          }
+        if ("-nopaint".equals(args[i]))
+          {
+            fillRectDemo.enableRepaints = false; 
+          }
+      }
+
+    SwingUtilities.invokeLater (new Runnable()
+     {
+       public void run()
+       {
+
+         fillRectDemo.initFrameContent();
+         JFrame frame = new JFrame("FillRect performance test");
+         frame.getContentPane().add(fillRectDemo);
+         frame.pack();
+         frame.show();
+         fillRectDemo.worker = fillRectDemo.new Worker();
+         fillRectDemo.worker.start();
+       }
+      });
+  }
+
+  /**
+   * Returns a DemoFactory that creates a SliderDemo.
+   *
+   * @return a DemoFactory that creates a SliderDemo
+   */
+  public static DemoFactory createDemoFactory()
+  {    
+    return new DemoFactory()
+    {
+      public JComponent createDemo()
+      {
+        fillRectDemo = new JNIOverhead();
+        SwingUtilities.invokeLater
+        (new Runnable()
+         {
+           public void run()
+           {
+             fillRectDemo.worker = fillRectDemo.new Worker();
+             fillRectDemo.worker.start();
+           }
+         });
+        return fillRectDemo;
+      }
+    };
+  }
+}