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

import javax.swing.*;

//主窗口部分
class Window extends JFrame implements ActionListener{
    JTextField cardnumber;        /*卡号*/
    JPasswordField password;     /*密码*/
    JButton b1,b2;
    
    public Window(){
       super("欢迎进入银行系统");
       Container cont=getContentPane();
       cont.setLayout(new FlowLayout());
       cont.add(new JLabel("卡号"));
       cardnumber=new  JTextField(10);
       cont.add(cardnumber);
       cont.add(new JLabel("密碼"));
       password=new JPasswordField(10);
       password.setEchoChar('*');
       
       cont.add(password);
       b1=new JButton("确定");
       b2=new JButton("退卡");
       cont.add(b1);
       b1.addActionListener(this);
       cont.add(b2);
       b2.addActionListener(this);
       this.addWindowListener(new WindowAdapter(){       //完全关闭窗口
            public void windowClosing(WindowEvent e){
                System.exit(0);
                }
            });

       setBounds(120,125,200,175);
       setVisible(true);
       
       }// public window
    
       public void actionPerformed(ActionEvent e){
           if(e.getActionCommand().equals("确定")){
               if(cardnumber.getText().equals(123456)&&password.equals(123456))
                   JOptionPane.showMessageDialog(null, "yes"); 

               else
                   JOptionPane.showMessageDialog(null, "信息输入错误");
                     }
                   //if
                if(e.getActionCommand().equals("退卡"))
                    System.exit(0);       //退卡
                    
       }//actionPerformed
       
    
    }//window
public class ATM{
    public static void main(String args[]){
        new Window();
    }

}