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

public class KeypressTest {
  public static void main(String[] args) {
    JFrame jf = new JFrame();
    jf.getContentPane().add(new JLabel("Make sure this window has focus, then hit some keys"));
    jf.getContentPane().add(new JLabel("CTRL-C at your console to quit"));
    jf.addKeyListener( new KeyListener() {
	public void keyPressed(KeyEvent e) {
	  System.out.println("PRESSED " + e);
	}
	public void keyReleased(KeyEvent e) {
	  System.out.println("RELEASED " + e);
	}
	public void keyTyped(KeyEvent e) {
	  // You are probably not interested in typed events
	  // System.out.println("TYPED " + e);
	}
      } );
    jf.setSize(400, 400);
    jf.setVisible(true);
  }
}