java swing close window without exiting app

Question

I have a little frame where I ask user & password. This frame will be opened clicking over a button in a main window.

Then I have two buttons: ok and cancel.

Answer 1

Maybe a cleaner way is just change the setDefaultCloseOperation from EXIT_ON_CLOSE to DISPOSE_ON_CLOSE :

setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);