框架一般用作Java应用程序的窗口，而Applet是Java小程序的窗口

 1 package TomAwt;
 2 
 3 
 4 import java.applet.Applet;
 5 import java.awt.*;
 6 public class TomAwt_18 extends Applet{
 7     private TextField textField1,textField2;
 8     public void init(){
 9         //construct TextField with default text
10         textField1=new TextField("在这里输入用户名");
11         //construct TextField with 15 elements visible
12         textField2=new TextField(15);
13         //set the echo charactor
14         textField2.setEchoChar(‘*‘);
15         //add components to applet
16         add(new Label("用户名: "));
17         add(textField1);
18         add(new Label("密  码: "));
19         add(textField2);
20     }
21     public void paint(Graphics g){
22         String s;
23         s="用户名: "+textField1.getText();
24         s=s+"  密码: "+textField2.getText();
25         showStatus(s);
26     }
27 }