ArrayList集合---案例斗地主

package anliti;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Random;


public class DouDiZhu {
    public static void main(String[] args) {
        //1准备牌
        //定义一个存储54张牌的ArrayList集合 泛型使用String
        ArrayList poker = new ArrayList<>();
        //定义两个数组  一个存储牌的花色  一个数组存储牌的序号
        String[] colors ={"♠","♥","♣","♦"};
        String[] numbers ={"2","A","K","Q","J","10","9","8","7","6","5","4","3",};
        // 先把大王存储到poker中
        poker.add("大王");
        poker.add("小王");
        //循环嵌套遍历两个数组，组装52张牌
        for(String number:numbers){
            for (String color : colors) {
                // System.out.println(color+number);
                //把组装好的牌存储到poker中
                poker.add(color+number);
            }
        }
        //System.out.println(poker);
        
        Collections.shuffle(poker);
        // System.out.println(poker);
        
        //定义四个集合  存储玩家的牌和底牌
        ArrayList wanjia1 = new ArrayList<>();
        ArrayList wanjia2 = new ArrayList<>();
        ArrayList wanjia3 = new ArrayList<>();
        ArrayList diPai = new ArrayList<>();
        
        for (int i = 0; i =51){
               //给底牌发牌
               diPai.add(p);
               //用牌数%于3为零发给玩家1
           }else if(i%3==0){
               wanjia1.add(p);
               //用牌数%于3为一发给玩家2
           }else if(i%3==1){
               wanjia2.add(p);
               //用牌数%于3为三发给玩家3
           }else if(i%3==2){
               wanjia3.add(p);
           }
        }
        // 4 看牌
        System.out.println("刘德华："+wanjia1);
        System.out.println("周瑞发："+wanjia2);
        System.out.println("周星驰："+wanjia3);
        System.out.println("底牌堆"+diPai);
    }
}
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    进阶版斗地主：有序的
    package anliti;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;

public class doudizhudie {
    public static void main(String[] args) {
        //1 准备牌
         //创建一个map集合 存储牌的索引和组装好的牌
        HashMap poker = new HashMap<>();
        //创建一个list集合  存储牌的索引
        List arrayList = new ArrayList<>();
        // 定义两个集合 存储牌的花色和序号
        List colors = List.of("♠", "♥", "♣", "♦");
        List numbers = List.of("2", "A", "K", "Q", "J", "10", "9", "8", "7", "6", "5", "4", "3");
        int index= 0;
        poker.put(index, "大王");
        arrayList.add(index);
        index++;
        poker.put(index, "小王");
        arrayList.add(index);
        index++;
        for (String s : numbers) {
            for (String s1 : colors ) {
                poker.put(index, s1 + s);
                arrayList.add(index);
                index++;
            }
        }
       //System.out.println(poker);
       //System.out.println(arrayList);
       Collections.shuffle(arrayList);
       //System.out.println(arrayList);
        // 定义四个集合分别用来存储玩家牌和底牌
       ArrayList wanjia1 = new ArrayList<>();
       ArrayList wanjia2 = new ArrayList<>();
       ArrayList wanjia3 = new ArrayList<>();
       ArrayList dipai = new ArrayList<>();
       // 便利list集合  获取每个牌的索引
       for (int i = 0; i < arrayList.size(); i++) {
           Integer in = arrayList.get(i);
           if (i >=51){
               dipai.add(in);
           }else if (i%3==0){
               wanjia1.add(i);
           }else if (i%3==1){
               wanjia2.add(i);
           }else if (i%3==2){
               wanjia3.add(i);
           }
       }
       //排序
        // 使用Collections中的方法sort（）方法
       Collections.sort(wanjia1);
       Collections.sort(wanjia2);
       Collections.sort(wanjia3);
       Collections.sort(dipai);
       // 5 看牌
        //调用看牌的方法 lookpoker（）；
       lookpoker("杨过",poker,wanjia1);
       lookpoker("小龙女",poker,wanjia2);
       lookpoker("甄志丙",poker,wanjia3);
       lookpoker("底牌",poker,dipai);
    }
        // 定义一个看牌方法 提高代码复用性
        
    public static void lookpoker(String name ,HashMap poker,ArrayList list){
        // 输出玩家不换行
        System.out.print(name+":");
        //遍历玩家或者底牌集合 获取牌的索引
        for (Integer key : list) {
            //使用牌的索引去map中 找到对应的牌
            String s = poker.get(key);
            System.out.print(s+" ");
        }
        System.out.println();// 打印完每一个玩家的牌换行
    }
}