How would I execute a function before you close JFrame

Question

Possible Duplicate:
Call a method when application closes

I want to call a method just before I close my java application using setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); I have tried WindowListener with windowClosed/windowsClosing and it doesn't work. it looks something like this

public class exampleFrame JFrame implements{

public exampleFrame (){
    this.addWindowListener(new windowAction());
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

class windowAction implements WindowListener{

        @Override
        public void windowActivated(WindowEvent e) {
            // TODO Auto-generated method stub

        }

        @Override
        public void windowClosed(WindowEvent e) {
        System.out.prinln("window closed")

        }

        @Override
        public void windowClosing(WindowEvent e) {
            // TODO Auto-generated method stub
            System.out.prinln("window closing")
        }

        @Override
        public void windowDeactivated(WindowEvent e) {
            // TODO Auto-generated method stub

        }

        @Override
        public void windowDeiconified(WindowEvent e) {
            // TODO Auto-generated method stub

        }

        @Override
        public void windowIconified(WindowEvent e) {
            // TODO Auto-generated method stub

        }

        @Override
        public void windowOpened(WindowEvent e) {
            // TODO Auto-generated method stub

        }

    }

}

doesn't work as in nothing comes out. for example you put a System.out.println("windows close");...that message doesn't show so the function window close or windowsClosing is calling that. or unless i am doing it wrong. — user629283, Dec 12 '12 at 00:15
First, use `setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);` if using a `WindowListener` (as seen in the answer of the duplicate). — Andrew Thompson, Dec 12 '12 at 00:16
*"if u.."* If you spell properly I might read your comments. Add @MadProgrammer (or whoever) to notify them of a new comment. — Andrew Thompson, Dec 12 '12 at 00:26
(from latest code) `setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);` But if you choose to ignore the working code on the duplicate thread, as well as my explicit advice in comments, I don't think there is any chance of you solving this. :( — Andrew Thompson, Dec 12 '12 at 00:28

score -1 · Answer 1 · answered Dec 12 '12 at 00:46

-1

I think what you want is something like this:

public class ExampleFrame extends JFrame{
   public ExampleFrame(){

      // you can use WindowAdapter and implement only the methods you need
      addWindowListner(new WindowAdapter(){

           @Override
           public void windowClosing(WindowEvent et) {
               System.out.println("Window closing");
           }
      }
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

answered Dec 12 '12 at 00:46

LuisTeixeira

1

Try that and see it fail (for at least two reasons). – Andrew Thompson Dec 12 '12 at 00:54

How would I execute a function before you close JFrame

1 Answers1