My WelcomeApplet

 1 import java.applet.*;
 2 import java.awt.*;
 3 import java.awt.event.*;
 4 public class WelcomeApplet extends Applet implements ActionListener //继承Applet类且实现ActionListener接口
 5 {
 6    Label lblName;
 7    TextField txtName;
 8    TextField txtDisp;
 9    public void init()
10    {
11       lblName=new Label("请输入您的名字");
12       txtName=new TextField(8);
13       txtDisp=new TextField(20);
14       add(lblName);//add方法没有指明对象，相当于当前对象(this)在调用
15       add(txtName);
16       add(txtDisp);
17       txtName.addActionListener(this);
18    }
19    public void actionPerformed(ActionEvent e)
20    {
21       txtDisp.setText(txtName.getText()+"欢迎您来到Java世界!");
22    }
23    public static void main(String args[])
24    {
25        Frame f =new Frame("欢迎");
26        f.addWindowListener(new WindowAdapter()
27                           {
28                               public void windowClosing(WindowEvent evt)
29                               {
30                                  System.exit(0);
31                               }
32                           }
33                           );//设置窗体的关闭按钮事件
34         WelcomeApplet a= new WelcomeApplet();
35         a.init();
36         f.add("Center",a);
37         f.setSize(400,300);
38         f.setVisible(true);
39         a.start();
40     }
41 }