JAVA课程作业3-生成52张扑克，模拟扑克牌洗牌

生成52张扑克，模拟扑克牌洗牌，并输出。

代码:

package com.NCU.ZHANGhuirong;

import java.util.ArrayList;
import java.util.Collections;

public class Card {
    public String poker(int num){
     String str="";
     String [] face={"♥","♠","♣","♦"};
     String [] number={"A","2","3","4","5","6","7","8","9","10","J","Q","K"};
     str+=face[num%4]+number[num%13];
     return str;
     }
    public void shuffle(ArrayList list){

    }
     public static void main(String [] args){
         ArrayList list=new ArrayList();
         Card card=new Card();
         for(int i=0;i<52;i++){
             list.add(card.poker(i));
         }
         for(int i=0;i<list.size();i++){
         System.out.printf("%s\t",list.get(i));
         if((i+1)%13==0){
             System.out.println(" ");
         }
         }
         System.out.println();
         Collections.shuffle(list);
         System.out.println("洗牌后:");
         for(int i=0;i<list.size();i++){
             System.out.printf("%s\t",list.get(i));
             if((i+1)%13==0){
                 System.out.println(" ");
             }

     }
     }
}

输出

♥A  ♠2  ♣3  ♦4  ♥5  ♠6  ♣7  ♦8  ♥9  ♠10 ♣J  ♦Q  ♥K   
♠A  ♣2  ♦3  ♥4  ♠5  ♣6  ♦7  ♥8  ♠9  ♣10 ♦J  ♥Q  ♠K   
♣A  ♦2  ♥3  ♠4  ♣5  ♦6  ♥7  ♠8  ♣9  ♦10 ♥J  ♠Q  ♣K   
♦A  ♥2  ♠3  ♣4  ♦5  ♥6  ♠7  ♣8  ♦9  ♥10 ♠J  ♣Q  ♦K   

洗牌后:
♥3  ♥9  ♦6  ♥J  ♦K  ♥4  ♦8  ♥K  ♦Q  ♦5  ♣7  ♠J  ♠A   
♦10 ♣A  ♥8  ♠9  ♥Q  ♦4  ♠6  ♠8  ♥10 ♣2  ♣10 ♦7  ♠10  
♥A  ♣J  ♠K  ♠5  ♥2  ♣8  ♦J  ♠Q  ♦3  ♦9  ♣Q  ♣K  ♣3   
♥5  ♣6  ♣5  ♦2  ♦A  ♥7  ♠4  ♥6  ♠7  ♣4  ♠3  ♠2  ♣9