How to add Icons to Title bar?

Question

How do I add custom Icons to the Title bar as this person did?

Jframe Title Icons

Answer 1

The following code snippet displays an icon in the title bar:

JFrame frame = new JFrame("Frame Icons");
frame.setIconImages(icons);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationByPlatform(true);
frame.setSize(200,100);
frame.setVisible(true);