Java – how do I set the application icon for a libgdx desktop application?

I'm trying to set an application icon from a - Desktop specific class:

package org.osgameseed.games.animalflip;

import com.badlogic.gdx.Files;
import com.badlogic.gdx.backends.lwjgl.LwjglApplication;
import com.badlogic.gdx.backends.lwjgl.LwjglApplicationConfiguration;

public class Main {
    public static void main(String[] args) {
        LwjglApplicationConfiguration cfg = new LwjglApplicationConfiguration();
        cfg.title = "AnimalFlip";
        cfg.useGL20 = false;
        cfg.width = 800;
        cfg.height = 600;
        cfg.addIcon("data/ic_launcher.png",Files.FileType.Internal);

        new LwjglApplication(new AnimalFlipGame(),cfg);
    }
}

The icon is not set (at least on Linux), any ideas on how to set it?

Solution

Look at the API (addicon (...):

Maybe the size of your icon is wrong, so it won't be set Otherwise it should work!

Just mention that you only need to set a small icon on the upper left edge (if the application starts), it is not the icon seen on the desktop!