how to make jframe to full screen code example
Example 1: full screen in jframe
// Getting fullscreen **effect** by extending the frame either direction.
frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
frame.setUndecorated(true);
Example 2: jframe full screen
frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
frame.setUndecorated(true);
frame.setVisible(true);