The default behavior of a JFrame when closing is HIDE_ON_CLOSE which does specifically what it says. That's why your event isn't getting fired : because the window isn't really closed. You can deal with this by changing the default closing behavior of your frame with :


You can also change your event with windowClosing. See java doc :

Invoked when the user attempts to close the window from the window's system menu.

Or you can simply get rid of your listener and add :


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