java实现双色球机选功能

package com.job.gateway.util;

import java.util.HashSet;
import java.util.Random;
import java.util.Set;


public class LotteryBallUtil {


    //红色球 区间
    private static Integer red = 33;
    //蓝色球 区间
    private static Integer blue = 16;
    //双色球长度 红球6个元素
    private static Integer redLength = 6;
    //双色球长度 蓝球1个元素
    private static Integer blueLength = 1;

    public static void main(String[] args) {
        Set redS = new HashSet<>();
        calculationNumber(redS, red, redLength);
        Set blueS = new HashSet<>();
        calculationNumber(blueS, blue, blueLength);
        redS.stream().sorted().forEach(r -> {
            System.out.print(r+",");
        });
        blueS.stream().forEach(b -> {
            System.out.println("蓝球:"+b);
        });
    }


    public static void calculationNumber(Set set, int section, int length) {
        if (set.size() == length) {
            return;
        }
        Random random = new Random();
        Integer temp = random.nextInt(section)+1;
        set.add(temp);
        calculationNumber(set, section, length);
    }


}