关于如何接受键盘的信息

import java.awt.*;
import java.awt.event.*;

public class TestKey {
public static void main(String[] args) {
MyFrame22 f = new MyFrame22("test");
}
}

class MyFrame22 extends Frame {
MyFrame22(String s) {
super(s);
setBounds(100,100,200,200);
setVisible(true);
setLayout(null);
addKeyListener(new MyKeyMonitor());
addWindowListener(new MyWindowMonitor2());
}

class MyKeyMonitor extends KeyAdapter {
public void keyPressed(KeyEvent e) {
int key = e.getKeyCode();
if(key == KeyEvent.VK_UP){<span style="white-space:pre">		</span>//查看API，有所有的键盘上的信息
System.out.println("UP");
}
}
}

class MyWindowMonitor2 extends WindowAdapter{
public void windowClosing(WindowEvent e) {
setVisible(false);
System.exit(0);
}
}
}