斗地主三步走——洗牌、发牌和看牌

public static void main(String[] args) {
   //1,买一副扑克,其实就是自己创建一个集合对象,将扑克牌存储进去
   String[] num = {"3","4","5","6","7","8","9","10","J","Q","K","A","2"};
   String[] color = {"红桃","黑桃","方片","梅花"};
   HashMap<Integer, String> hm = new HashMap<>();//存储索引和扑克牌
   ArrayList<Integer> list = new ArrayList<>();//存储索引
   int index = 0;
   //拼接扑克牌并索引和扑克牌存储在hm中
   for(String s1 : num) {//获取数字
       for(String s2 : color) {//获取颜色
           hm.put(index, s2.concat(s1));
           list.add(index);//将索引0到51添加到list集合中
           index++;
      }
  }
   //将小王添加到双列集合中
   hm.put(index, "小王");
   list.add(index);//将52索引添加到集合中
   index++;
   hm.put(index, "大王");
   list.add(index);//将53索引添加到集合中
   //2,洗牌
   Collections.shuffle(list);
   //3,发牌
   TreeSet<Integer> gaojin = new TreeSet<>();
   TreeSet<Integer> longwu = new TreeSet<>();
   TreeSet<Integer> me = new TreeSet<>();
   TreeSet<Integer> dipai = new TreeSet<>();
   for(int i = 0; i < list.size(); i++) {
       if(i >= list.size() - 3) {
           dipai.add(list.get(i));//将三张底牌存储在底牌集合中
      }else if(i % 3 == 0) {
           gaojin.add(list.get(i));
      }else if(i % 3 == 1) {
           longwu.add(list.get(i));
      }else {
           me.add(list.get(i));
      }
  }
   //看牌
   lookPoker(hm, gaojin, "高进");
   lookPoker(hm, longwu, "龙五");
   lookPoker(hm, me, "冯佳");
   lookPoker(hm, dipai, "底牌");
}
/*
     - 看牌
     - 1,返回值类型void
     - 2,参数列表HashMap,TreeSet,String name
   */
public static void lookPoker(HashMap<Integer, String> hm,TreeSet<Integer> ts ,String name) {
   System.out.print(name + "的牌是:");
   for(Integer i : ts) {//i代表双列集合中的每一个键
       System.out.print(hm.get(i) + " ");
  }
   System.out.println();
}