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

Make a function in outer class where you are implementing the JFrame (you need to close on pressing cancel button).
Write this.setVisible(false); in the implementation of that function.
Finally call this function in the ActionListener implementation when you want to close it.