JAVA

java fullscreen jframe

frame.setExtendedState(JFrame.MAXIMIZED_BOTH);

fullscreen jframe

// For fullscreen, put the following in your code:

frame.setExtendedState(JFrame.MAXIMIZED_BOTH); 

// You can also set the dimensions of the window like this:

frame.setSize(1920, 1080); // Change to resolution of your screen.

java fullscreen jframe

frame.setExtendedState(JFrame.MAXIMIZED_BOTH); 
frame.setUndecorated(true);
frame.setVisible(true);