java密码

import java.awt.*;
import javax.swing.*;
public class CheckBox extends JApplet
{
 public void init(){
  Container c = getContentPane();
  c.setLayout(new GridLayout(2,1));
  c.add(new JLabel("enter password"));
  JPasswordField pwd= new JPasswordField(10);
  c.add(pwd);
  
  c.add(new JLabel("enter password"));
  pwd= new JPasswordField(10);
  pwd.setEchoChar('+');
  c.add(pwd);
 }
}