数据结构--顺序表小项目--简单洗牌算法(JAVA)-优快云博客

首先创建牌的属性Card类

public class Card {
    private String suit;//牌的花色
    private int rank;//牌的面值

    public Card(String suit, int rank) {
        this.suit = suit;
        this.rank = rank;
    }

    @Override
    public String toString() {
        return "{" + suit + rank + "}";
    }
}

在牌的功能类CardFunc中依次实现买牌(创建牌),洗牌，发牌等功能

买牌方法：

这里为了好表示就去除了大王和小王，剩余52张牌，可以通过循环依次创建

public class Cardfunc {
    //花色的种类
    public static final String[] suits = {"♥", "♠", "♣", "♦"};

    //买牌
    public List<Card> buyCard() {
        List<Card> cardList = new ArrayList<>();
        for (int i = 1; i < 13; i++) {
            for (int j = 0; j < 4; j++) {
                int rank = i;
                String suit = suits[j];
                Card card = new Card(suit, rank);
                cardList.add(card);
            }
        }
        return cardList;
    }
}

测试类测试一下

public class Test {
    public static void main(String[] args) {
        Cardfunc cardfunc = new Cardfunc();
        //买牌
        System.out.println("洗牌前");
        List<Card> cardList = cardfunc.buyCard();
        System.out.println(cardList);
    }
}

接下来实现洗牌功能

 //洗牌
    public void shuffle(List<Card> cardList) {
        Random random = new Random();
        for (int i = cardList.size() - 1; i > 0; i--) {
            int index = random.nextInt(i);
            swap(cardList, i, index);
        }
    }
       //被调用的交换方法
     private void swap(List<Card> cardlist, int i, int j) {
        Card tmp = cardlist.get(i);
        cardlist.set(i, cardlist.get(j));
        cardlist.set(j, tmp);

    }

randdom.nextInt(i)会返回一个大于等于0小于i的数字

上述for循环的逻辑就是从第52张牌与前依次面随机一张牌交换，从而实现洗牌功能

测试一下：

public class Test {
    public static void main(String[] args) {
        Cardfunc cardfunc = new Cardfunc();
        //买牌
        System.out.println("洗牌前");
        List<Card> cardList = cardfunc.buyCard();
        System.out.println(cardList);

        //洗牌
        System.out.println("洗牌后");
        cardfunc.shuffle(cardList);
        System.out.println(cardList);

    }
}

实现发牌方法：

//发牌
    public List<List<Card>> play(List<Card> cardList) {
        //选手一
        List<Card> hand0 = new ArrayList<>();
        //选手三
        List<Card> hand1 = new ArrayList<>();
        //选手二
        List<Card> hand2 = new ArrayList<>();
        
        List<List<Card>> hand = new ArrayList<>();
        hand.add(hand0);
        hand.add(hand1);
        hand.add(hand2);

        //三个人 每个人轮流摸五张牌
        for (int i = 0; i < 5; i++) {
            for (int j = 0; j < 3; j++) {
                Card card = cardList.remove(0);
                hand.get(j).add(card);
            }
        }
        return hand;
    }

List<List<Card>>类似与一个二维数组，如下图

测试一下：

public class Test {
    public static void main(String[] args) {
        Cardfunc cardfunc = new Cardfunc();
        //买牌
        System.out.println("洗牌前");
        List<Card> cardList = cardfunc.buyCard();
        System.out.println(cardList);

        //洗牌
        System.out.println("洗牌后");
        cardfunc.shuffle(cardList);
        System.out.println(cardList);

        //3个人 每个人轮流摸5张牌
        List<List<Card>> ret = cardfunc.play(cardList);
        for (int i = 0; i < ret.size(); i++) {
            System.out.println("第" + (i + 1) + "个人的牌" + ret.get(i));
        }
        System.out.println("剩下的牌");
        System.out.println(cardList);
    }
}