How to hide the default minimize/maximize and close buttons on JFrame window in Java?

Question

I would like to know if it is possible to create a JFrame window which has no default maximize/minimize(-) and close(x) buttons! I have added custom buttons on

Answer 1

Use JFrame.setDefaultLookAndFeelDecorated. It may not be the exact thing you need but doc says,

Provides a hint as to whether or not newly created JFrames should have their Window decorations (such as borders, widgets to close the window, title...) provided by the current look and feel.

Try this code:

JFrame frame = new JFrame("Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(100, 100);
frame.setUndecorated(true);
frame.getRootPane().setWindowDecorationStyle(JRootPane.NONE);
frame.setVisible(true);

This will remove the entire titlebar. Also take a look at this thread.

Otherwise use JWindows.