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Dialog and JDialog behave differently with respect to setting the icon used in the alt-tab listing on Windows XP. This may also be true of other icon usages and/or other platforms. For instance on WinXP, only the AWT Dialog appears in the task bar. The included test demonstrates the problem. A Dialog and JDialog are setup identically. The icons are both set correctly in the title bars, however when you press alt-tab to switch between applications, you can see that the icon for the AWT Dialog is also the custom icon, but the JDialog's icon is still the default. I believe this is limited to the case of dialogs with null owners - otherwise, the owning frames's icon is the only one in the alt-tab list. This is a bug in new Mustang functionality - before Window.setIconImage() was added, there wasn't a way to set an icon directly on a (J)Dialog. // Test showing that setIconImage() doesn't set the alt-tab icon for JDialog, // yet does for Dialog import java.awt.*; import javax.swing.*; import javax.imageio.*; import java.io.*; public class JDialogSetIconBug { public static void main(String[] args) { try { Dialog dialog = new Dialog((Frame)null, "AWT Dialog"); JDialog jdialog = new JDialog((Frame)null, "JDialog"); Image icon = ImageIO.read(new File("64x64.gif")); dialog.setBounds(10, 200, 100, 100); dialog.setIconImage(icon); jdialog.setBounds(200, 200, 100, 100); jdialog.setIconImage(icon); dialog.setVisible(true); jdialog.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }
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