Set Icon for executable Jar file [duplicate]

This question already has answers here:
Answer:1

you can use setIconImage:

frame.setIconImage(
new ImageIcon(getClass().getClassLoader().getResource("PATH/TO/YourImage.png"))
);

Update

If you want to change the coffee-cup then you may use tools like JSmooth to create executable java file and also change the jar file icon.

As you can see in the comments JSmooth can be used for windows operating systems. For Mac you can check the link here on how to change the icon.

For linux OS you can create a desktop launcher and choose an icon image for it.

Answer:2

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