java实现随机洗牌算法

直插入代码~~懒了

import java.util.Random;

class Card
{
    public String num;
    public String suit;
    Card(String n,String s)
    {
        this.num=n;
        this.suit=s;
    }
    public String toString()
    {
        String ss=suit+":"+num+"  ";
        return ss;
    }
}

class DeskOfCard
{
    Card card[];
    public void initcard()//初始化
    {
        String num[]={"A","2","3","4","5","6","7","8","9","10","J","Q","K"};
        String suit[]={"方块","梅花","红桃","黑桃"};
        card = new Card[52];
        for(int i=0;i<52;i++)
        {
            card[i] = new Card(num[i%13],suit[i/13]);
        }
    }

    public void shufflecard()//洗牌
    {
        Random rd = new Random();
        for(int i=0;i<52;i++)
        {
            int j = rd.nextInt(52);//生成随机数
            Card temp = card[i];//交换
            card[i]=card[j];
            card[j]=temp;
        }
    }


    public void dealcard()//发牌
    {
        for(int i=0;i<52;i++)
        {
            if(i%4==0) System.out.println("\n");
            System.out.print(card[i]);
        }
    }
}

public class TestCard 
{
    public static void main(String[] args) 
    {
        DeskOfCard cc = new DeskOfCard();
        cc.initcard();
        cc.shufflecard();
        cc.dealcard();
    }
}