Name: rmT116609 Date: 08/20/2003


FULL PRODUCT VERSION :
java version "1.4.2"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2-b28)
Java HotSpot(TM) Client VM (build 1.4.2-b28, mixed mode)

FULL OS VERSION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
JFileChooser.setVisible(true) leads to a NullPointerException under the
Windows XP Look & Feel. Applications that use JFileChooser outside of
its built-in dialog (as ours does) will fail.

This bug may break lots of existing code. It certainly breaks our
application for users of the Windows Look & Feel.

  Bug 4806285 looks identical, but was closed as "not a bug" without
explanation.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run code.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Expect nothing.
ACTUAL -
Get a stack dump.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(ImageIcon.java:161)
at javax.swing.ImageIcon.<init>(ImageIcon.java:147)
at com.sun.java.swing.plaf.windows.WindowsFileChooserUI$ShortCutPanel.<init>(WindowsFileChooserUI.java:603)
at com.sun.java.swing.plaf.windows.WindowsFileChooserUI.installComponents(WindowsFileChooserUI.java:361)
at javax.swing.plaf.basic.BasicFileChooserUI.installUI(BasicFileChooserUI.java:130)
at com.sun.java.swing.plaf.windows.WindowsFileChooserUI.installUI(WindowsFileChooserUI.java:176)
at javax.swing.JComponent.setUI(JComponent.java:449)
at javax.swing.JFileChooser.updateUI(JFileChooser.java:1701)
at javax.swing.JFileChooser.setup(JFileChooser.java:345)
at javax.swing.JFileChooser.<init>(JFileChooser.java:320)
at javax.swing.JFileChooser.<init>(JFileChooser.java:273)
at JFileChooserBug7.main(JFileChooserBug7.java:11)
Exception in thread "main"


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
  import javax.swing.*;

    public class JFileChooserBug7 {
       public static void main(String args[]) {
         // Uncomment the next line to work around the bug.
         //new JFileChooser();
       
         // Switch to Windows L&F.
         try {
            UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"); }
             catch(Exception e) {}
      
         JFileChooser fc = new JFileChooser();
         fc.setVisible(true);
      }
   }

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Create a JFileChooser under the Metal Look & Feel before switching to
Windows Look & Feel. This seems to cure the problem.
(Incident Review ID: 193453)
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