如何在windowslistener方法内调用JFrame（类本身）？

Question

I want to reference the JFrame (which is the class itself) inside a WindowsListener method. Is there any way to do this?

    diag_ap.addWindowListener(new WindowAdapter() {

        @Override
        public void windowClosing(WindowEvent e) {
            this.setEnabled(true); //does not work
        }
    }); 

I expect to call the class frame and disable it so that the only thing that can be pressed is the JDialog box.

Answer 1

Using this keyword inside new WindowAdapter().windowClosing(event) method refers to the WindowAdapter object that you created.

To refer the object of the JFrame inside WindowAdapter, you should use MyJFrame.this . So, the code should be,

diag_ap.addWindowListener(new WindowAdapter() {

        @Override
        public void windowClosing(WindowEvent e) {
            MyJFrame.this.setEnabled(true); // replace MyJFrame with name of your JFrame
        }
    });