今天去面试，遇到这个面试题，当时想法想通了，我跟面试官说给我半小时，但是超时了没写出来。
回来复盘一下~
思路步骤：
①创建map容器存储扑克牌key为牌的索引，value为牌的值
②按照同花顺顺序存储到容器
③在52张牌内随机抽取五个索引
④索引排序
⑤判断索引是否连续和花色是否统一
实现代码：

/**
 * @Date 2022/8/19 10:12
 * @Author PAMELA
 * @Description 模拟扑克牌，随机抽取五张牌，判断是否为同花顺
 */
public class Poker {
    public static void main(String[] args) {
        //创建扑克容器 key为索引 value为值
        Map<Integer,String> hashMap = new HashMap<Integer,String>();

        //创建花色 与 值
        String[] colors = {"♦","♥","♠","♣"};
        String[] numbers = {"2","3","4","5","6","7","8","9","10","J","Q","K","A"};

        //组成牌 存入容器
        int index=0;
        for(String color : colors){
            for (String number : numbers) {
                hashMap.put(index,color+number);
                index++;
            }
        }
        System.out.println(hashMap);
        //是否同花顺
        boolean flag = true;
        //随机的5个索引
        int[] randIndex = new int[5];
        Random random = new Random();
        List<String> five = new ArrayList<String>();
        //随机抽选5张牌
        for (int i=0;i<5;i++){
            //保存索引
            randIndex[i] = random.nextInt(index);
            //保存数据
            five.add(hashMap.get(randIndex[i])) ;
        }
//====================================测试同花顺数据===============================
/*        //对应牌的索引
        randIndex[0]=20;
        randIndex[1]=21;
        randIndex[2]=22;
        randIndex[3]=23;
        randIndex[4]=24;
        //对应索引的值
        five.set(0,"♥9");
        five.set(1,"♥10");
        five.set(2,"♥J");
        five.set(3,"♥Q");
        five.set(4,"♥K");*/
//==============================================================================
        //索引排序
        Arrays.sort(randIndex);
        for (int i = 0; i < 5; i++) {
            System.out.print(randIndex[i]+" ");
        }
        System.out.println();

        //取头一张牌的花色
        String s = five.get(0);
        char color = s.charAt(0);

        for (int i = 0; i < 4; i++) {
            //比较剩余牌的花色
            String s1 = hashMap.get(randIndex[i]);
            char c = s1.charAt(0);
            if (randIndex[i]+1==randIndex[i+1] && c==color){
                continue;
            }else {
                flag=false;
                break;
            }
        }

        System.out.println(five);
        if (flag) {
            System.out.println("您的牌是同花顺！");
        }else{
            System.out.println("您的牌不是同花顺！");
        }

    }

}

测试结果：

{0=♦2, 1=♦3, 2=♦4, 3=♦5, 4=♦6, 5=♦7, 6=♦8, 7=♦9, 8=♦10, 9=♦J, 10=♦Q, 11=♦K, 12=♦A, 13=♥2, 14=♥3, 15=♥4, 16=♥5, 17=♥6, 18=♥7, 19=♥8, 20=♥9, 21=♥10, 22=♥J, 23=♥Q, 24=♥K, 25=♥A, 26=♠2, 27=♠3, 28=♠4, 29=♠5, 30=♠6, 31=♠7, 32=♠8, 33=♠9, 34=♠10, 35=♠J, 36=♠Q, 37=♠K, 38=♠A, 39=♣2, 40=♣3, 41=♣4, 42=♣5, 43=♣6, 44=♣7, 45=♣8, 46=♣9, 47=♣10, 48=♣J, 49=♣Q, 50=♣K, 51=♣A}
9 17 25 35 36 
[♠J, ♦J, ♥6, ♥A, ♠Q]
您的牌不是同花顺！