*  业务需求
*      斗地主的做牌，发牌，排序，看牌
*      业务，54张牌
*      点数："3","4","5","6","7","8","9","10","J","Q","K","A","2"
*      花色："♠","♥","♣","♦"
*      大小王："👲"(大王)，"👨‍🌾"(小王)
*      点数风暴要组合4种花色，大小王各一张
*      斗地主：发51张牌，剩下3张做底牌
*  功能：
*      1，做牌
*      2，洗牌
*      3，定义3个玩家
*      4，发牌
*      5，排序
*      6，看牌
*  面向对象设计案例
*      a,定义一个牌类，代表牌对象
*      b,定义一个集合存储54张牌，集合只需要1个

public class DemoGame {/*a,顶一个静态集合，代表牌对象，存储54张牌，集合只需要一个*/public static final List<Card> ALL_CARDS = new ArrayList<>();/*b,做牌*/static{//1,定义一个数组存储牌的点数，类型确定，个数确定请用数组存储String[] numbers = {"3","4","5","6","7","8","9","10","J","Q","K","A","2"};//2,定义一个数组存储牌的花色，类型确定，个数确定存入到集合中去String[] colors = {"♠","♥","♣","♦"};//3,先遍历点数与4种花色组中成牌对象存入到集合中去int index = 0;for (String number : numbers) {//遍历花色for (String color : colors) {Card card = new Card(number,color,index++);ALL_CARDS.add(card);}}//4，单独加入大小王Collections.addAll(ALL_CARDS, new Card("","👲",index++),new Card("","👨‍🌾",index++));System.out.println("输出新牌 :"+ALL_CARDS);}public static void main(String[] args) {/*c,洗牌*/Collections.shuffle(ALL_CARDS);System.out.println("洗牌后 :"+ALL_CARDS);/*d,定义3个玩家*/ArrayList<Card> ZhangSan = new ArrayList<>();ArrayList<Card> LiSi = new ArrayList<>();ArrayList<Card> WangWu = new ArrayList<>();/*e,发牌*/for (int i = 0; i < ALL_CARDS.size() - 3; i++) {//得到当前这张牌对象Card c = ALL_CARDS.get(i);//判断这个牌发给谁if (i % 3 == 0){ZhangSan.add(c);}else if (i % 3 == 1){LiSi.add(c);}else if (i % 3 == 2){WangWu.add(c);}}/*f,对牌进行排序*/sortCard(ZhangSan);sortCard(LiSi);sortCard(WangWu);/*g,看牌*/System.out.println("张三 :"+ZhangSan);System.out.println("李四 :"+LiSi);System.out.println("王五 :"+WangWu);//截取最后三张牌做底牌List<Card> lastThreeCards = ALL_CARDS.subList(ALL_CARDS.size() - 3, ALL_CARDS.size());System.out.println("底牌 :"+lastThreeCards);}/*对牌的List集合进行排序*/private static void sortCard(List<Card> cards) {Collections.sort(cards, new Comparator<Card>() {@Overridepublic int compare(Card o1, Card o2) {return o2.getIndex()- o1.getIndex();}});}}

public class Card{private String number;private String color;private int index;//存储牌在新牌中的索引public Card() {}public Card(String number, String color, int index) {this.number = number;this.color = color;this.index = index;}public Card(String number, String color) {this.number = number;this.color = color;}public int getIndex() {return index;}public void setIndex(int index) {this.index = index;}public String getNumber() {return number;}public void setNumber(String number) {this.number = number;}public String getColor() {return color;}public void setColor(String color) {this.color = color;}@Overridepublic String toString() {return number+color;}
}