java awt KeyEvent

import java.awt.Color;import java.awt.Frame;import java.awt.event.KeyAdapter;import java.awt.event.KeyEvent;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class TestKeyEvent {public static void main(String[] args) {new TKEFrame();}}class TKEFrame extends Frame {TKEFrame() {setBounds(100, 200, 500, 500);setBackground(new Color(204, 204, 255));addKeyListener(new KeyAdapter() {@Overridepublic void keyPressed(KeyEvent e) {int keyCode = e.getKeyCode();if (keyCode == KeyEvent.VK_UP) {System.out.println("UP");}}});setResizable(false);setVisible(true);addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {setVisible(false);System.exit(0);}});}}