题目
斗地主综合案例：有序版
1.准备牌：大王小王
52张牌：循环嵌套遍历两个集合，组装52张牌
可以使用Map<Integer,String>集合储存牌的索引+组装好的牌。创建一个List集合存储牌的索引
2.洗牌：使用Collections中的方法shuffle(List)
3.发牌：一人一张轮流发牌，每人17张，集合索引%3，剩余3张给底牌.（注意：要先判断底牌 i > 50，即在第51张牌开始给底牌发）
4.排序：使用Collections中的方法sort（List）
5.看牌：可以用查表的方法
遍历一个集合，获取到另外一个集合的key，通过key查找到value
遍历玩家和底牌的List集合，获取到Map集合的key，通过key找到value值
***【注意】***：使用了JDK9及以上版本才可以使用的List.of()。
List<String> colors = List.of("♠","♥","♣","♦");List<String> numbers = List.of("2","A","K","Q","J","10","9","8","7","6","5","4","3");
如果是JDK9以下的版本，可以建立两个数组：
String[] colors = {"♠","♥","♣","♦"};String[] numbers = {"2","A","K","Q","J","10","9","8","7","6","5","4","3")};
程序
package Demo06;import java.util.*;/*斗地主有序版本1.准备牌2.洗牌3.发牌4.排序5.看牌*/public class DouDiZhu2 {public static void main(String[] args) {//1.准备牌//创建集合poker，存储54张牌的索引和组装好的牌HashMap<Integer,String> poker = new HashMap<>();//创建一个list集合，存储牌的索引ArrayList<Integer> pokerIndex = new ArrayList<>();//定义两个集合，分别存储花色和数字List<String> colors = List.of("♠","♥","♣","♦");List<String> numbers = List.of("2","A","K","Q","J","10","9","8","7","6","5","4","3");//存储大小王//定义一个牌的索引int index = 0;poker.put(index,"大王");pokerIndex.add(index);index++;poker.put(index,"小王");pokerIndex.add(index);index++;//循环嵌套遍历两个集合，组装52张牌，存储到集合中for (String number : numbers) {for (String color : colors) {poker.put(index,color+number);pokerIndex.add(index);index++;}}//2.洗牌Collections.shuffle(pokerIndex);// 3.发牌//定义四个集合分别存储玩家和底牌的牌索引ArrayList<Integer> player01 = new ArrayList<>();ArrayList<Integer> player02 = new ArrayList<>();ArrayList<Integer> player03 = new ArrayList<>();ArrayList<Integer> dipai = new ArrayList<>();for (int i = 0; i < pokerIndex.size(); i++) {int in = pokerIndex.get(i);if(i > 50) {dipai.add(in);}else if(i % 3 == 0) {player01.add(in);}else if(i % 3 == 1) {player02.add(in);}else if(i % 3 == 2) {player03.add(in);}}// 4.排序Collections.sort(player01);Collections.sort(player02);Collections.sort(player03);Collections.sort(dipai);//5.看牌pokerShow("刘亦菲",poker,player01);pokerShow("单薇子",poker,player02);pokerShow("周星驰",poker,player03);pokerShow("底牌",poker,dipai);}/*定义一个方法，看牌，使用查表方法*/public static void pokerShow(String name,HashMap<Integer,String> poker,ArrayList<Integer> list) {//输出玩家的名称System.out.print(name+ ":");for (Integer key : list) {String value = poker.get(key);System.out.print(value+ " ");}System.out.println();}}
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