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

JFrame.setDefaultCloseOperation(frame.DO_NOTHING_ON_CLOSE);

Will make the 'X' button no functioning. It's works for me.