FULL PRODUCT VERSION :
java version "1.5.0_04"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_04-b05)
Java HotSpot(TM) Client VM (build 1.5.0_04-b05, mixed mode, sharing)

and later.

ADDITIONAL OS VERSION INFORMATION :
Linux sonic 2.6.12-10-386 #1 Sat Mar 11 16:13:17 UTC 2006 i686 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
If a JWindow is called from within an ActionListener actionPerformed function the contents of the JWindow will not paint correctly. The window will display, but be entirely gray.

See source code for example.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Add a component with an ActionListener. In the actionPerformed function, open a JWindow with a label in it. On causing the actionPerformed event to fire, the JWindow will open but the contents will not paint.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The JWindow should open and paint the contents of the label on screen.
ACTUAL -
The JWindow opened but appeared as an empty gray box on the screen.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
No errors were caused.

REPRODUCIBILITY :
This bug can be reproduced always.

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

import javax.swing.JButton;

import javax.swing.JPanel;

import javax.swing.JProgressBar;

import javax.swing.JWindow;



import java.awt.Dimension;

import java.awt.Label;

import java.awt.Frame;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;





/**

 * A non-blocking window to state "Working, please wait".

 *

 */

public class WorkingPanel {



//VARIABLES



/**

* The dialog being hidden/shown.

*/

private JWindow mDialog;



/**

* The bar showing the progress of the operation.

*/

private JProgressBar mProgressBar;



/**

* A button to cancel the current operation (throws exception).

*/

//private JButton mCancelButton;



//CONSTRUCTORS



/**

* Sets up a working panel that displays "Working, please wait".

*

* @param parent The parent frame this will replace on screen.

*/

public WorkingPanel(){

Frame parent = null;

mDialog = new JWindow(parent);

JPanel contentPanel = new JPanel();

contentPanel.setPreferredSize(new Dimension(180, 100));

contentPanel.setLayout(new BoxLayout(contentPanel, BoxLayout.Y_AXIS));



Label label = new Label(" WORKING, PLEASE WAIT... ");

label.setSize(180,30);



mProgressBar = new JProgressBar(0,100);



contentPanel.add(label);

contentPanel.add(mProgressBar);



mDialog.getContentPane().add(contentPanel);

mDialog.pack();

mDialog.repaint();

mDialog.setLocationRelativeTo(parent);

}



//FUNCTIONS



/**

* Shows this dialog centered on the parent on screen.

*/

public void show(){

mDialog.setVisible(true);

}



/**

* Hides this dialog.

*/

public void hide(){

mDialog.setVisible(false);

}



/**

* Hands over the JProgessBar for updates.

*/

public JProgressBar getProgressBar(){

return mProgressBar;

}



public static void main(String[] args){

try{

JButton abut = new JButton ("press me");

abut.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent ae){

WorkingPanel wp = new WorkingPanel();

wp.show();

try{

Thread.sleep(10000);

}catch(Exception e){

e.printStackTrace();

}

}

});

JWindow awin = new JWindow();

awin.getContentPane().add(abut);

awin.pack();

awin.repaint();

awin.setLocationRelativeTo(null);

awin.setVisible(true);

Thread.sleep(10000);

}catch(Exception e){

e.printStackTrace();

}

System.exit(0);

}

}

//end of class.
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Use the windows java vm, it does not occur in this version.