1 package com.gh;

 import java.util.Scanner;

 /**

  * 自定义异常

  * @author ganhang

  *

  */

 public class ExceptionDemo {

     public static void main(String[] args) throws exception {

         Scanner sc = new Scanner(System.in);

         System.out.println("请输入帐号aaa密码123");

         String id = sc.nextLine();

         int pwd = sc.nextInt();

         if (!id.equals("aaa") || pwd != 123)

             throw new exception("帐号或密码错误！");

         else System.out.println("帐号正确！");

     }

 }

 class exception extends Exception{

     public exception(String mes){

         super(mes);

     }

 }