按键监听类KeyListener及适配器改良方案

导包导的恶心，真是马上要对notepad累觉不爱了，，好在顺利导完。。

监听按键信息//source codeimport java.awt.Color ;import java.awt.Font ;import java.awt.GridLayout ;import java.awt.event.ActionEvent ;import java.awt.event.ActionListener ;import java.awt.event.WindowListener ;import java.awt.event.WindowAdapter ;import java.awt.event.WindowEvent ;import java.awt.event.KeyEvent ;import java.awt.event.KeyListener ;import javax.swing.JFrame ;import javax.swing.JButton ;import javax.swing.JLabel ;import javax.swing.JPanel ;import javax.swing.JTextField ;import javax.swing.JTextArea ;import javax.swing.JScrollPane ;import javax.swing.JPasswordField ;class MyHandleKey extends JFrame implements KeyListener{JTextArea text = new JTextArea() ;public MyHandleKey(){super.setTitle("按键精灵") ;JScrollPane sc = new JScrollPane(text) ;sc.setBounds(5,5,300,200) ;super.add(sc) ;text.addKeyListener(this) ;super.addWindowListener(new WindowAdapter(){public void WindowClosing(WindowEvent e){System.exit(1) ;}}) ;super.setSize(400,400) ;super.setVisible(true) ;}public void keyPressed(KeyEvent e) //按键被按下{text.append(" "+KeyEvent.getKeyText(e.getKeyCode())+" 键被按下\n") ;}public void keyReleased(KeyEvent e)//按键松开{text.append(" "+KeyEvent.getKeyText(e.getKeyCode())+"被松开\n") ;}public void keyTyped(KeyEvent e){text.append("输入的内容是："+e.getKeyChar()+"\n") ;}} ;class Tester{ public static void main(String args[]) {MyHandleKey mhk = new MyHandleKey() ; }} ;与鼠标监听同样的问题，这样写代码太冗余，下面提供适配器改良

import java.awt.event.ActionEvent ;import java.awt.event.ActionListener ;import java.awt.event.WindowListener ;import java.awt.event.WindowAdapter ;import java.awt.event.WindowEvent ;import java.awt.event.KeyEvent ;import java.awt.event.KeyAdapter ; //ferfectimport java.awt.event.KeyListener ;import javax.swing.JTextArea ;import javax.swing.JFrame ;import javax.swing.JScrollPane ;import javax.swing.JPasswordField ;class MyHandleKey extends JFrame{JTextArea text = new JTextArea() ;public MyHandleKey(){super.setTitle("按键精灵") ;JScrollPane sc = new JScrollPane(text) ;sc.setBounds(5,5,300,200) ;super.add(sc) ;text.addKeyListener(new KeyAdapter() //再次应用Adapter{public void keyPressed(KeyEvent e){//text.setText("") ;text.append(KeyEvent.getKeyText(e.getKeyCode())+" 被按下\n") ;}}) ;super.addWindowListener(new WindowAdapter(){public void WindowClosing(WindowEvent e){System.exit(1) ;}}) ;super.setSize(400,400) ;super.setVisible(true) ;}} ;class Tester{ public static void main(String args[]) {MyHandleKey mhk = new MyHandleKey() ; }} ;

一个人最大的破产是绝望，最大的资产是希望。