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编一个多用户登陆程序

package com.java.Day20161118;
//编一个多用户登陆程序
import java.util.*;
public class Login {
private static String [] names ={"user", "admin" , "manager"} ;
private static String [] password = {"123123","asdfg","123456"};
private static int index = -1 ;
  public static void main(String[] args) {
    Scanner input = new Scanner(System.in) ;
    do{
       System.out.println("请输入用户名:");
       String name = input.next() ;
       for (int i = 0; i < names.length; i++) {
        if (name.equals(names[i])) { //为什么用name==names[i] 就会报错 ?
        index = i ;
        break ;
          }
        }
      }while(index==-1);
      System.out.println();
      System.out.println("请输入密码:");
      int index2 = -2 ;
      int index3 = 3 ;//用来记录剩余登陆次数。
    do{
        System.out.println();
        String pass = input.next();
        System.out.println();
        if (pass.equals(password[index])) {
          System.out.println();
          System.out.println("进入主菜单!");
          index2 = -4 ;
        }else{
          index3 -- ;
          if(index3==0){
            System.out.println("输入密码有误,请明日再来登陆!");
            break ;
            }
          System.out.println("输入的密码有误,请重新输入:");
          System.out.println("您还有"+index3+"次机会!");
         }
       }while(index2 ==-2);
    }
}

编一个多用户登陆程序