Dear friends, how to remove the title bar of JFrame! !! !!

spqrhao

JFrame.setDefaultLookAndFeelDecorated(true);
JDialog.setDefaultLookAndFeelDecorated(true);

Personally think that if you just need JFrame not to display the title, then you should use JWindow.
But if you need to make a title yourself, the above is the correct usage. For example, the default Metal style, you need to set it before you can see the Metal title bar.

spqrhao

Forgot to mention that not all UIs support titles.
It depends on what the public boolean getSupportsWindowDecorations() method in LAF returns.

qp951951

JFrame.setUndecorated(true); This method removes all decorations of the form, including the title bar.