Close one JFrame without closing another?

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If you do not want your application to terminate when a JFrame is closed, use

setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE)

instead of

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

From the documentation:

  • DO_NOTHING_ON_CLOSE (defined in WindowConstants): Don’t do anything; require the program to handle the operation in the windowClosing method of a registered WindowListener object.
  • HIDE_ON_CLOSE (defined in WindowConstants): Automatically hide the frame after invoking any registered WindowListener objects.
  • DISPOSE_ON_CLOSE (defined in WindowConstants): Automatically hide and dispose the frame after invoking any registered WindowListener objects.
  • EXIT_ON_CLOSE (defined in JFrame): Exit the application using the System exit method. Use this only in applications.

This was my answer before the question was clarified, might still be useful:

You can use setVisible(false) on your JFrame if you want to display the same frame again.
Otherwise call dispose() to remove all of the native screen resources.

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