JDialog from Icon close

[emekadavid]

I have a window, JFrame, if I turn off setDefaultCloseOperation(),
and register a listener on the window, I want to bring up a JDialog or
Optionpane that gives yes/cancel option if I attempt to close the
window by clicking on the icon at the top left or the X button at top
right.

 

[RedGrittyBrick]

I have a window, JFrame, if I turn off setDefaultCloseOperation(),
and register a listener on the window, I want to bring up a JDialog or
Optionpane that gives yes/cancel option if I attempt to close the
window by clicking on the icon at the top left or the X button at top
right.

WindowListener windowCloser = new WindowAdapter() {
public void windowClosing(WindowEvent e) {
JFrame frame = (JFrame) e.getWindow();
int choice = JOptionPane.showConfirmDialog(frame,
"Really Exit MyApp?",
"Exiting MyApp ... ",
JOptionPane.OK_CANCEL_OPTION);
if (choice == 0) {
// savePreferences();
System.exit(0);
}
}
};
addWindowListener(windowCloser);