Java模拟扑克牌洗牌实现生成52张扑克的方法示例

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(@SuppressWarnings("rawtypes") ArrayList list) {
  }
  @SuppressWarnings("unchecked")
  public static void main(String[] args) {
    @SuppressWarnings("rawtypes")
    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(" ");
      }
    }
  }
}

♥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