why doesn't the frame close when i press the escape key?

Question

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;


public class displayFullScreen extends JFrame {
        private JLabel alarmMessage = new JLabel(         


        

Answer 1

import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.KeyStroke;

public abstract class EscapableFrame extends JFrame
{
    public EscapableFrame()
    {
        // on ESC key close frame
        getRootPane().getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
        KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0), "Cancel"); //$NON-NLS-1$
        getRootPane().getActionMap().put("Cancel", new AbstractAction()
        { 

            public void actionPerformed(ActionEvent e)
            {
                System.exit(0);
                //framename.setVisible(false);
            }
       });

   }

}