老师讲的方法

package com.homework;public class Password {    public static String getCode(int length){        String code = "";        for(int i=0;i

网上找的方法

package cn.meiju;public class Password {        public static void main(String[] args) {            char[] arr = {48,49,50,51,52,53,54,55,56,57,//从0到9的数字                     65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,//从A到Z的数字                     97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122//从a到z的数字             };             int i=1;             while(i++<=6){                 //循环六次，得到六位数的验证码             char msg =arr[(int)(Math.random()*62)];             System.out.print(msg);             }                     }}