How can I check when a JFrame has been closed?

问题

How do I check when JFrame window is closed?

MediaPanel mediaPanel=new MediaPanel();
JFrame_of_subtitle frame=new JFrame_of_subtitle(mediaPanel);
JPanel panel=new JPanel();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

回答1:

You will add WindowListener to your frame.

WindowListener has a windowClosing callback function which will be invoked when your frame is being closed.

You can see this tutorial for sample code.

来源：https://stackoverflow.com/questions/10370064/how-can-i-check-when-a-jframe-has-been-closed