Java偷懒洗牌算法

public class Card {

    private String card;
    private String color;

    public Card(String card, String color) {
        this.card = card;
        this.color = color;
    }

    public String toString()
    {
        String ss= color+":"+card+"  ";
        return ss;
    }

}

public class DeskOfCard {

    Card[] cards;

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


    public void shufflecard() {
        Random random = new Random();
        for (int i=0; i<52;i++) {
            int j = random.nextInt(52);
            Card temp = cards[i];
            cards[i] = cards[j];
            cards[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(cards[i]);
        }
    }


    public static void main(String[] args) {
        DeskOfCard desk = new DeskOfCard();
        desk.initCard();
        print(desk);
        System.out.println("\n\n洗牌");
        desk.shufflecard();
        print(desk);
        System.out.println("\n\n发牌");
        desk.dealcard();
    }


    public static void print(DeskOfCard desk) {
        int i = 0;
        for (Card card : desk.cards) {
            if (i%13 == 0) {
                System.out.println();
            }
            System.out.printf(card.toString());
            i++;
        }
    }



}