Java使用ArrayList实现扑克牌的示例代码

前言

学习了关于集合类的知识，我们可以做一个小项目来加深对集合类知识的学习！

一、项目要求

代码实现，一副扑克牌(不包括大小王)的购买、打乱、发牌。

二、具体实现

2.1 Card类

class Card {
  private int rank;//数字
  private String suit;//花色

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

  @Override
  public String toString() {
      return "[ " + this.suit + ":"+this.rank+" ]";
  }
}

2.2 生成扑克牌

 private static final String[] suits = {"♥", "♠", "♣", "♦"};

  //假设没有大小王：1 2 3............. 11 12 13
  public static List<Card> buyCard() {
      ArrayList<Card> cards = new ArrayList<>();
      for (int i = 0; i < 4; i++) {
          for (int j = 1; j <= 13; j++) {
//                String suit = suits[i];
//                int rank = j;
//                Card card = new Card(rank, suit);
//                cards.add(card);
              cards.add(new Card(j,suits[i]));
          }
      }
      return cards;
  }

2.3 打乱顺序

 private static void swap(List<Card> cards, int i, int j) {
      Card tmp = cards.get(i);
      cards.set(i,cards.get(j));
      cards.set(j,tmp);
  }

  //洗牌
  public static void shuffle(List<Card> cards) {
      int size = cards.size();
      for (int i = size-1; i > 0 ; i--) {
          Random random = new Random();
          int rand = random.nextInt(i);
          swap(cards, i, rand);
      }
  }

2.4 发牌

		System.out.println("揭牌：3个人每个人轮流揭牌5张牌");

      ArrayList<List<Card>> hand = new ArrayList<>();

      List<Card> hand1 = new ArrayList<>();
      List<Card> hand2 = new ArrayList<>();
      List<Card> hand3 = new ArrayList<>();
      
      hand.add(hand1);
      hand.add(hand2);
      hand.add(hand3);

      //每个人，轮流揭牌
      for (int i = 0; i < 5; i++) {
          for (int j = 0; j < 3; j++) {
              Card card = cards.remove(0);
              hand.get(j).add(card);
          }
      }

三、Test.java

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

class Card {
  private int rank;//数字
  private String suit;//花色

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

  @Override
  public String toString() {
      return "[ " + this.suit + ":"+this.rank+" ]";
  }
}
public class Test1 {
  private static final String[] suits = {"♥", "♠", "♣", "♦"};

  //假设没有大小王：1 2 3............. 11 12 13
  public static List<Card> buyCard() {
      ArrayList<Card> cards = new ArrayList<>();
      for (int i = 0; i < 4; i++) {
          for (int j = 1; j <= 13; j++) {
//                String suit = suits[i];
//                int rank = j;
//                Card card = new Card(rank, suit);
//                cards.add(card);
              cards.add(new Card(j,suits[i]));
          }
      }
      return cards;
  }

  private static void swap(List<Card> cards, int i, int j) {
      Card tmp = cards.get(i);
      cards.set(i,cards.get(j));
      cards.set(j,tmp);
  }

  //洗牌
  public static void shuffle(List<Card> cards) {
      int size = cards.size();
      for (int i = size-1; i > 0 ; i--) {
          Random random = new Random();
          int rand = random.nextInt(i);
          swap(cards, i, rand);
      }
  }

  public static void main(String[] args) {
      List<Card> cards = buyCard();
      System.out.println("买牌：" + cards);
      shuffle(cards);
      System.out.println("洗牌：" + cards);
      System.out.println("揭牌：3个人每个人轮流揭牌5张牌");

      ArrayList<List<Card>> hand = new ArrayList<>();

      List<Card> hand1 = new ArrayList<>();
      List<Card> hand2 = new ArrayList<>();
      List<Card> hand3 = new ArrayList<>();
      
      hand.add(hand1);
      hand.add(hand2);
      hand.add(hand3);

      //每个人，轮流揭牌
      for (int i = 0; i < 5; i++) {
          for (int j = 0; j < 3; j++) {
              Card card = cards.remove(0);
              hand.get(j).add(card);
          }
      }
      System.out.println("第一个人的牌："+ hand1);
      System.out.println("第二个人的牌："+ hand2);
      System.out.println("第三个人的牌："+ hand3);
      System.out.println("剩下的牌："+cards);
  }

  public static void main1(String[] args) {
      // 1. 构造一副扑克牌
      // 2. 揭牌
      Card card = new Card(3,"♥");
      System.out.println(card);

  }
}

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