Hi,

The code below gives the NullPointerException from

javax.swing.plaf.metal.MetalLookAndFeel.getControlDarkShadow(MetalLookAndFee
l.java:1071)

in JDK 1.3.1_12.   However, the error is not given in JDK 1.4.2_04 .  To be
compatible with Java plugins for browsers on the Mac, I need to compile with
1.3.1.

Below the code is the stack trace.

Any suggestions are welcome!

// SliderPaintError.java

import javax.swing.*;

import java.awt.*;

public class SliderPaintError extends JApplet  {

   public void init() throws NullPointerException {

       try {

           Container contentPane = getContentPane();

           SliderPanel sliderPanel = new SliderPanel();

           contentPane.add(sliderPanel);

       }

       catch (Exception e) {

           e.printStackTrace();

       }

   }

   private class SliderPanel extends JPanel {

       SliderPanel(){

           setLayout(new BoxLayout(this,BoxLayout.X_AXIS));

           JSlider eValSldr = new JSlider(JSlider.HORIZONTAL, 0, 5, 0);

           add(eValSldr);

       }

   }

}

Exception occurred during event dispatching:

java.lang.NullPointerException

at
javax.swing.plaf.metal.MetalLookAndFeel.getControlDarkShadow(MetalLookAndFee
l.java:1071)

at javax.swing.plaf.metal.MetalSliderUI.paintTrack(MetalSliderUI.java:153)

at javax.swing.plaf.basic.BasicSliderUI.paint(BasicSliderUI.java:718)

at javax.swing.plaf.ComponentUI.update(ComponentUI.java:34)

at javax.swing.JComponent.paintComponent(JComponent.java:390)

at javax.swing.JComponent.paint(JComponent.java:682)

at javax.swing.JComponent.paintWithBuffer(JComponent.java:3873)

at javax.swing.JComponent._paintImmediately(JComponent.java:3816)

at javax.swing.JComponent.paintImmediately(JComponent.java:3667)

at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:370)

at
javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQu
eueUtilities.java:119)

at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:149)

at java.awt.EventQueue.dispatchEvent(EventQueue.java:332)

at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.ja
va:126)

at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:88)

at java.awt.EventDispatchThread.run(EventDispatchThread.java:80)