java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0)
Java HotSpot(TM) Client VM (build 1.3.0, mixed mode)


If setIconImage(image) is called AFTER the frame is diplayed ( using show() or
setVisible(true) ), the image is not displayed in the ICON box and the default
image is used instead.

Here is a demo:

/*********************************************************/
/*********************************************************/

import java.awt.*;
import javax.swing.*;
import gov.nasa.ksc.clcs.utilx.SystemEnvironment;

/**
 * This class will provides evidence that JFrame.setIconImage() will not
 * work if used after the frame has been shown (using JFrame.show() or
 * JFrame.setVisible().
 *
 * To duplicate the error just run the demo WITHOUT any command line options.
 * To duplicate a workaround, run the demo WITH a command line option.
 *
 * PS:
 * Bug was tested with 60x60 PNG, JPEG and GIF files. Solaris 2.6
 */

public class TestIcons extends JFrame
{
  public TestIcons(boolean showBefore)
  {
    super("TestIcon");
    super.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );

    //Image icon = Toolkit.getDefaultToolkit().getImage( "./image.png" );
    Image icon = new ImageIcon( "./image.png" ).getImage();

    if( showBefore )
    {
      System.out.println("JFrame.setIconImage() ..... FAILED");
      super.show();
      super.setIconImage( icon );
    }
    else
    {
      System.out.println("JFrame.setIconImage() ..... WORKS");
      super.setIconImage( icon );
      super.show();
    }
  }
  
  
  public static void main(String[] args)
  {
    //If no commandline option is used. The error will be duplicated.
    //Otherwise, the working option is invoked.
    boolean bln = ( args.length == 0 );

    TestIcons f = new TestIcons(bln);

    // Iconifying frame to show the ICON. This is done since the
    // ICON will not be display in NORMAL state.
    f.setState( JFrame.ICONIFIED );
  }
  
} // TestIcons
/*********************************************************/
(Review ID: 126410) 
======================================================================
Posted Date : 2006-07-24 07:20:34.0

Use setIconImage(image) before the frame is set visible for the 1st time.
======================================================================

This problem only occurs on Solaris, not Windows.
  xxxxx@xxxxx   2001-07-19
Contribution forum : https://jdk-collaboration.dev.java.net/servlets/ProjectForumMessageView?forumID=1463&messageID=13754
Posted Date : 2006-06-20 01:04:34.0

The bug cannot be reproduced with b85, though it's rarely reproducible with b84 (linux-i586/Gnome 2.10). 
It may be a thread race, but as far as there're no test that could definitely reproduce this issue the bug may be safely closed.
Posted Date : 2006-07-24 13:45:31.0

This problem is ALSO SEEN on J2SE build 1.3.1-b24 on Linux. 
I am running Red Hat Linux version 7.1

A very dirty workaround of using setVisible(false) followed 
by setVisible(true) changes the icon .... but caused a bad 
flicker !!

Confirmed on J2SE 1.4.0.02 on Linux as well.
Mandrake 9.0

This should be a simple fix...

 Icon rose = new ImageIcon("rose.gif");
        label2 = new JLabel("Label with text and icon", rose, SwingConstants.LEFT);
        label2.setToolTipText("This is label 2");
        c.add(label2);

I am having a problem with JFrame displaying my image; I am getting the lable and the ToolTipText but not the image.

Frame.setIconImage() works okay on visible frames 
on Windows 2000.

This does not update a visible frame's icon on Linux/KDE,
until you restart the KDE toolbar, or do:
    frame.hide();
    frame.show();

I'm not sure whether all taskbars, window switchers etc.
have an API for notification of change of icon, so, unless
Sun write code for each window manager, I can't imagine this
working properly.

Er, forget that last one.  It seems there are property
change events in X, so there is probably a general solution.

I can't belive this bug is still open.  It should be a
simple fix.