Swing 高手请进

//you may press ESCAPE key to close this window.
        KeyStroke stroke = KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0);
        this.getRootPane().registerKeyboardAction(
                new ActionListener() {
                    public void actionPerformed(ActionEvent e) {
                        dispose();
                    }
                }, stroke, JComponent.WHEN_IN_FOCUSED_WINDOW);