import java.awt.event.*;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.WindowConstants;

public class KeyEcho extends JPanel {
	private static final long serialVersionUID = 1L;
	private JLabel display;

	public KeyEcho() {
		display = new JLabel("None");		
		add(display);
		setFocusable(true);
		addKeyListener(new KeyHandler(display));
	}

	/* Listener for the button */
	private class KeyHandler extends KeyAdapter {
		JLabel display;
		public KeyHandler(JLabel display) {
			this.display = display;
		}
		
		/* Notice we don't have to worry about keyPressed or keyReleased */
		public void keyTyped(KeyEvent event) {
			display.setText(event.getKeyChar() + " ");
			display.repaint();
		}
	}

	private static void createAndShowGUI() {
		JFrame frame = new JFrame("Key Echo");

		/* Adds the panel to the frame */
		frame.setContentPane(new KeyEcho());
		frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
		frame.pack();

		/* Shows the GUI */
		frame.setVisible(true);
	}

	public static void main(String[] args) {
		javax.swing.SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				createAndShowGUI();
			}
		});
	}
}