keylistenerdemo.java

我的一个ＪＡＶＡ作业

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
class KeyListenerDemo extends JFrame implements KeyListener{
KeyListenerDemo(String title){
super(title);addKeyListener(this);
setSize(100,100);setVisible(true);}
public void keyPressed(KeyEvent e){
System.out.println("Key pressed:virtual key code="+e.getKeyCode());}
public void keyReleased(KeyEvent e){
System.out.println("Key released:virtual key code="+e.getKeyCode());}
public void keyTyped(KeyEvent e){
System.out.println("Key Typed:virtual key code="+e.getKeyCode());}
public static void main(String args[]){
new KeyListenerDemo("Key Listerner Demo");}}