按按钮事件处理 

 1 package ch11_3;
 2 
 3 import java.awt.*;
 4 import java.awt.event.ActionEvent;
 5 import java.awt.event.ActionListener;
 6 
 7 import javax.swing.*;
 8 
 9 public class EventTest extends JFrame implements ActionListener {
10 
11     private JButton button1;
12     private JButton button2;
13     private JTextField Text1;
14     
15     public EventTest()  {
16         super("事件使用实例_单击事件");
17         button1=new JButton("欢迎");
18         button2=new JButton("再见");
19         Text1=new JTextField("试试看☺",20);
20         Text1.setEditable(false);
21         this.setBounds(500, 500, 500, 300);
22         this.setLayout(new FlowLayout(FlowLayout.LEFT));
23         this.add(button1);
24         this.add(button2);
25         this.add(Text1);
26         //注册监听器
27         button1.addActionListener(this);
28         button2.addActionListener(this);
29         
30     }
31 
32 
33     @Override
34     public void actionPerformed(ActionEvent e) {//单击事件的响应处理方法
35         if(e.getSource()==button1) {
36             Text1.setText("欢迎欢迎!☺☺");
37         }
38         else {
39             Text1.setText("拜拜┏(＾0＾)┛");
40         }
41     }
42     public static void main(String[] args) {
43         EventTest a=new EventTest();
44         a.setVisible(true);
45         a.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
46 
47     }
48 
49 }

 

posted @ 2020-12-22 16:19  丁帅帅dss  阅读(116)  评论(0)    收藏  举报