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App icon

Posted on 2000-04-27
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Last Modified: 2012-06-27
Hi,
How do I set a frame's icon, using a .gif file? for both JFrame and JDialog.

By setting an icon I mean like an app icon.
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Question by:s_lavie
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by:Jim Cakalic
ID: 2756332
Use Frame.setIconImage(Image):

    Frame frame = new Frame("Application");
    ImageIcon icon = new ImageIcon("my_frame_icon.gif");
    frame.setIconImage(icon.getImage());

Best regards,
Jim Cakalic
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Jim Cakalic earned 50 total points
ID: 2756360
Sorry, that wasn't a complete answer. This works for JFrame since it extends Frame.

JDialog is another story. JDialog will use whatever icon image its parent Frame uses. You set the parent Frame of a JDialog by using one of the four JDialog constructors that has 'Frame owner' as its first argument.

If you want your JDialog to have a different icon image or you don't want to (or can't) set an existing Frame as the dialog owner, you can create a dummy JFrame, set its image, and make this the owner of the JDialog.

    JFrame dummyFrame = new JFrame();
    ImageIcon icon = new ImageIcon( ....... );
    dummyFrame.setIconImage(icon.getImage());
    JDialog dialog = new JDialog(dummyFrame, ...);

Best regards,
Jim Cakalic

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