http://www.reddit.com/r/learnprogramming/comments/r70os/java_help_with_keylistener/

KeyTest.java

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

class KeyTest{
    public static void main(String[] args){
	
	SwingUtilities.invokeLater(new Runnable(){
		public void run() {
		    new Panell();
		}
	    });
	
    }
    
}

class Panell extends JFrame{
    Panell() {
	
	setFocusable(true);
	setPreferredSize(new Dimension(100, 100));
	addKeyListener(new KeyListen());
	setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	pack();
	setVisible(true);
	
    }
}
class KeyListen implements KeyListener{
    
    public void keyTyped(KeyEvent e){
	System.out.println("keyTyped()");
    }
    public void keyPressed(KeyEvent e){
	System.out.println("keyPressed()");
    }
    public void keyReleased(KeyEvent e){
	System.out.println("keyReleased()");
    }
}