严志炎_swing学习源代码_02

package com.yzy.demo;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;

public class Demo5 extends JFrame {
 public Demo5() {
  JButton btn = new JButton("按钮1");
  btn.addActionListener(new MyListener());
  this.add(btn);

  this.pack();
  this.setVisible(true);

 }

 public static void main(String[] args) {
  Demo5 demo = new Demo5();

 }
}

class MyListener implements ActionListener {

 @Override
 public void actionPerformed(ActionEvent arg0) {
  System.out.println("我被单击了");

 }

}