斗地主练习（按照斗地主的规则，完成洗牌发牌的动作。）

按照斗地主的规则，完成洗牌发牌的动作。
具体规则：

• 使用54张牌；

• 打乱顺序；

• 三个玩家参与游戏，三人交替摸牌，每人17张牌，最后三张留作底牌；

• 手中的牌按从小到大的顺序排列

  import java.util.ArrayList;
   import java.util.Collections;
   import java.util.LinkedHashMap;
   import java.util.Map;
  
  public class Doudizhu {
   public static void main(String[] args){
       //1.创建编号和牌对应的map集合,编号越大牌越大
       Map<Integer,String> map = new LinkedHashMap<Integer,String>();
       //2.创建牌的编号对应的ArrayList集合
       ArrayList<Integer> arraylist = new ArrayList<Integer>();
       //3.向Map,ArrayList中添加数据
         //编号
       int id = 1;
         //花色和数值
       String[] colors={"♠️","♥️","♣️","♦️"};
       String[] numbers={"3","4","5","6","7","8","9","10","J","Q","K","A","2"};
         //生成牌
       for (String num:numbers
            ) {
           for (String color:colors
                ) {
               String card = color+num;
               map.put(id,card);
               arraylist.add(id);
               id++;
           }
       }
       map.put(id,"小王");
       arraylist.add(id);
       id++;
       map.put(id,"大王");
       arraylist.add(id);
  
   //4.洗牌
   Collections.shuffle(arraylist);
  
   //5.发牌
   ArrayList<Integer> person1Id = new ArrayList<Integer>();
   ArrayList<Integer> person2Id = new ArrayList<Integer>();
   ArrayList<Integer> person3Id = new ArrayList<Integer>();
   ArrayList<String> remaining = new ArrayList<String>();
    //给三个玩家轮流发牌
   for (int i=0;i<arraylist.size()-3;i++){
       person1Id.add(arraylist.get(i));
       i++;
       person2Id.add(arraylist.get(i));
       i++;
       person3Id.add(arraylist.get(i));
   }
   //剩下的三张底牌
   for (int j=arraylist.size()-3;j<arraylist.size();j++){
       //获取牌的编号
       int remainningId = arraylist.get(j);
       //根据牌的编号找到牌
       String remainingCard = map.get(remainningId);
       //将牌添加到ArrayList中
       remaining.add(remainingCard);
   }
   System.out.println("底牌："+remaining);
  
   //6.给三个玩家手里的牌排序
   Collections.sort(person1Id);
   Collections.sort(person2Id);
   Collections.sort(person3Id);
  
  
   ArrayList<String> person1Card = new ArrayList<String>();
   ArrayList<String> person2Card = new ArrayList<String>();
   ArrayList<String> person3Card = new ArrayList<String>();
   //7.看牌
   //根据牌的编号从Map集合中获取他的牌
   for (int i:person1Id
        ) {
       String value = map.get(i);
       person1Card.add(value);
   }
   for (int i:person2Id
           ) {
       String value = map.get(i);
       person2Card.add(value);
   }
   for (int i:person3Id
           ) {
       String value = map.get(i);
       person3Card.add(value);
   }
   System.out.println(person1Card);
   System.out.println(person2Card);
   System.out.println(person3Card);
   }
  }
  

结果为：