import java.awt.*;
import java.awt.event.*;

public class TestTextField implements ActionListener{
 TextField name;
 TextField password;
 
 public static void main( String args[]) {
  TestTextField ttf = new TestTextField();
  ttf.createUI();
 }
 
 public void createUI(){
  Frame f = new Frame("登录界面");
  f.add(new Label("请输入您的用户信息:"),"North");
  
  Panel p1 = new Panel();
  p1.setLayout(new BorderLayout());  
  Panel p11 = new Panel();
  p11.setLayout(new GridLayout(2,1));
  p11.add(new Label("用户名:"));
  p11.add(new Label("密  码:"));  
  Panel p12 = new Panel();
  p12.setLayout(new GridLayout(2,1));
  name = new TextField(10);
  name.addActionListener(this);
  password = new TextField(10);
  password.setEchoChar('*');
  password.addActionListener(this);
  p12.add(name);
  p12.add(password);  
  p1.add(p11,"West");
  p1.add(p12,"Center");
  
  Panel p2 = new Panel();  
  Button submit = new Button("提交");
  Button reset = new Button("重置");
  submit.addActionListener(this);
  reset.addActionListener(this);

  p2.add(submit);
  p2.add(reset);
  
  f.add(p1,"Center");
  f.add(p2,"South");
  f.addWindowListener(new WindowAdapter(){
   public void windowClosing(WindowEvent e){
    System.exit(0); 
   } 
  }); 
  f.setSize(200,130);
  f.setLocation(300,200);
  f.setVisible( true);
 }
 
 public void actionPerformed(ActionEvent e){
  String s = e.getActionCommand();
  if(s.equals("重置")){
   this.clear();
  }else if(s.equals("提交") || (e.getSource()==name) || (e.getSource()==password)){
   this.submit(); 
  }   
 } 
 public void clear(){
  name.setText("");
  password.setText(""); 
 }
 public void submit(){
  String n = name.getText();
  String psw = password.getText();
  System.out.println("用户名:" + n + "\t密码:" + psw); 
 }
}