Rand7ToRand10

思路：通过放大整个随机数表示的范围（前提是等可能性），再去缩小范围找。

import java.util.Random;

public class Rand7ToRand10 {
    public static void main(String[] args) {
        System.out.println(rand10());
    }

    public static int rand10() {
        int x = 50;
        while(x > 40){
            x = 7 * (rand7()-1) + rand7();
        }
        return x % 10 + 1;
    }

    static Random random = new Random();
    public static int rand7(){
        return random.nextInt(7)+1;
    }
}

标签：random,实现,Random,Rand10,public,int,static,rand7,Rand7
来源： https://blog.csdn.net/weixin_43471422/article/details/120349888