Java Swing adding Action Listener for EXIT_ON_CLOSE

Question

I have a simple GUI:

    public class MyGUI extends JFrame{

        public MyGUI(){
           run();
        }

        void run(){
           setSize(100,         


        

Answer 1

Write this code within constructor of your JFrame:

this.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
this.addWindowListener(new java.awt.event.WindowAdapter() {
    @Override
    public void windowClosing(java.awt.event.WindowEvent e) {
        System.out.println("Uncomment following to open another window!");
        //MainPage m = new MainPage();
        //m.setVisible(true);
        e.getWindow().dispose();
        System.out.println("JFrame Closed!");
    }
});