testactionevent.java

我的一个ＪＡＶＡ作业

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TestActionEvent {
    public static void main(String args[]) {
	   JFrame f = new JFrame("Test");
       Button b = new Button("Press Me!");
   	       Monitor bh = new Monitor();
       	       b.addActionListener(bh);
f.getContentPane().add(b,BorderLayout.CENTER);
 f.pack(); f.setVisible(true);  
 //f.setLocation(300,300);            
 f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 }}
class Monitor implements ActionListener {
    public void actionPerformed(ActionEvent e) {
  System.out.println("a button has been pressed");    }}