When you set a frame's window icon to a GIF that has 
a transparent background on Windows NT 4.0 SP4, the 
transparent portion of the image is set to black rather
than the color that the window's title bar is.

This problem has cropped up with all versions of JDK 1.2, 
however, I have not noticed this problem at all in 
the JDK 1.1.x platform.

This problem occurs with both 32x32 and 16x16 GIFs.

Below is a TestCase you can try.
Make sure that the image cloud-icon.gif is in the
same directory that you are running this code from.
I have posted the cloud-icon.gif file to my Web site
at http://www.dippybird.com/cloud-icon.gif


import java.awt.*;
import javax.swing.*;
public class TestFrame extends Frame {


  public TestFrame() {
    ImageIcon imageIcon;
    Image image;
    try{
      imageIcon = new ImageIcon(getClass().getResource("cloud-icon.gif"));
      image = imageIcon.getImage();
      this.setIconImage(image);
    }catch (Exception e){
      System.out.println("Problem finding cloud icon");
    }
    this.add(new Label("Notice that the transparent background "+
                        "color for this window's icon is black rather than the title bar color."));
    this.pack();
  }

  public static void main(String[] args) {
    new TestFrame().show();
  }
}
(Review ID: 83951) 
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None
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Verified to exist in 1.2.2 and 1.3, Windows only.
Problem does not exist in 1.1.8.

  xxxxx@xxxxx   1999-08-04



This is a duplicate of  4175560 (setIconImage no longer handles transparent GIFs) which was fixed in 1.3.
  xxxxx@xxxxx   2004-04-09
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I also have the same problem under Windows 95.

Someone fix this please!
This seams like one of the last issues concerning a Java Application being
easily identifiable from a native Win32 application.

It would also be a good idea to have an icon with multiple sizes,
because when the icon is shown in the title bar it is 16x16 
and when it appears in the ALT-TAB window it is 32x32.

I reported this problem in 1998 (#4175560) and was informed 
that it is fixed. It does not look like that. 

Essentially the same problem, except that the whole image 
is black on NT4 SP5