dialog w keylistener

import java.awt.Dimension;
import java.awt.Dialog.ModalityType;
import java.awt.event.*;
import javax.swing.*;

public class Foo01 {
    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> foo());
    }

    public static void foo() {
        JPanel panel = new JPanel();
        JButton button = new JButton("Button");
        panel.add(button);

        final JFrame frame = new JFrame("Frame");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(panel);
        frame.pack();
        frame.setLocationByPlatform(true);
        frame.setVisible(true);

        button.addActionListener(e -> {
            JPanel panel2 = new JPanel();
            panel2.setPreferredSize(new Dimension(100, 40));
            JDialog dialog = new JDialog(frame, "Dialog", ModalityType.APPLICATION_MODAL);
            dialog.add(panel2);
            dialog.pack();
            dialog.setLocationByPlatform(true);
            dialog.addKeyListener(new KeyAdapter() {
                @Override
                public void keyTyped(KeyEvent e) {
                    char ch=e.getKeyChar();
                    if (ch==' ') {
                        System.out.println("got space");
                    }
                }
            });
            dialog.setVisible(true);
        });
    }
}