java生成六位验证码

import java.util.Random;

public class random {
    public static String getrandom(){
    String code = "";
    Random random = new Random();
    for (int i = 0; i < 6; i++) {
        int r = random.nextInt(10); //每次随机出一个数字（0-9）
        code = code + r;  //把每次随机出的数字拼在一起
    }
    return code;
    
    }
}

public class Random {
    public static Integer getRandom(){
        String randomString=null;
        Integer random = null;
        do{
            random=(int)(Math.random()*1000000);
            randomString=random+"";
        }
        while(randomString.length()<6);
    
    return random;
    }
}