lesson7 事件监听

 

 

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package com.zym.lesson7;   import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent;   public class TestActionEvent {       public static void main(String[] args) {           Frame frame=new Frame("课堂练习，事件监听");           //按钮按下，触发事件        Button button=new Button("click me!");          //它需要 一个监听addActionListener，所以建一个类去实现           MyActonListener myActonListener=new MyActonListener();        button.addActionListener(myActonListener);           frame.add(button);           frame.setSize(200,200);           frame.setVisible(true);           frame.addWindowListener(new WindowAdapter() {                                     //窗体关闭时做的事                                     @Override                                     public void windowClosing(WindowEvent e) {                                         // super.windowClosed(e);                                         System.exit(0);                                     }                                 }         );     } }   class MyActonListener implements ActionListener{       @Override     public void actionPerformed(ActionEvent e) {           System.out.println("aaaaaa");     } }