Modifying taskbar icon of my .jar program

java jar icons size taskbar
Rohit Malish picture Rohit Malish · May 13, 2012 · Viewed 17.6k times · Source

I'm trying to change the default java icon that appears in taskbar everytime I run my .jar program. I managed to change it with frame.setIconImage(img); but this makes icon way too small, I want it to be as big as other programs icons and have a high quality. Any way I can do that? Thanks.

Answer

a_horse_with_no_name picture a_horse_with_no_name · May 15, 2012

As you only supplied a single icon, Windows will then scale that icon to whatever size it needs displaying it in the taskbar (could be 16x16, 32x32 or other sizes, depending on the desktop them and size of the taskbar.

If you want to have a "good looking" icon in the task bar you will need to provide a 32x32 pixel version of your icon.

Once you have that you can call setIconImages(List) instead of setIconImage() to define the icons that the operating system can use:

List<Image> icons = new ArrayList<Image>();
icons.add(getImage("someImage16x16.gif"));
icons.add(getImage("someImage32x32.gif"));
window.setIconImages(icons);

Where getImage() is some method returning the proper image icon. Essentially that would be the same steps you already used to define the current icon.

You can also supply a 64x64 and 24x24 icon using this method (just add more icons to the list).

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