验证码

import java.util.LinkedList;
import java.util.Scanner;
import javax.swing.JOptionPane;
public class Aaa{
 public static void main(String[] args) {
  Aaa t=new Aaa();
  t.denglu();
  }
  public   static void denglu() {
     String Zhanghao, Mima, W;
     Zhanghao = JOptionPane.showInputDialog("输入账号：");
     if (Zhanghao.equals("123456")) {
         Mima = JOptionPane.showInputDialog("输入密码：");
         if (Mima.equals("123456")) {
             int yanzhengma = (int) (Math.random() * 10000);
             W = JOptionPane.showInputDialog("输入验证码："+yanzhengma);
             String s=Integer.toString(yanzhengma);
             if(W.equals(s))
             {
                 JOptionPane.showMessageDialog(null, "登录成功！");
                   open();
             }
             else {
                 JOptionPane.showMessageDialog(null, "验证码错误");
                 }
             
     }else {
             JOptionPane.showMessageDialog(null, "密码错误");
         }
     }
       else {
         JOptionPane.showMessageDialog(null, "无此账号记录");
     }
}

 private static void open() {
  // TODO 自动生成的方法存根
  
 }
}