JFrame: How to disable window resizing?

Use setResizable on your JFrame

yourFrame.setResizable(false);

But extending JFrame is generally a bad idea.

This Code May be Help you : [ Both maximizing and preventing resizing on a JFrame ]

frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
frame.setVisible(true);
frame.setResizable(false);

You can use a simple call in the constructor under "frame initialization":

setResizable(false);

After this call, the window will not be resizable.

Simply write one line in the constructor:

setResizable(false);

This will make it impossible to resize the frame.

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