Java -输出不正确打印

Question

我如何改进我的代码，使它不会产生哈希值，当我调用我的打印方法?我估计@2a....等在Card关键字后面是哈希值。

当我调用我的方法将它们打印出来时，我的代码产生以下输出:

run:
card.Card@2a139a55
card.Card@15db9742
card.Card@6d06d69c
card.Card@7852e922
My code:
public class Card {
    /**
     * @param args the command line arguments
     */
    static String[] rank = {"2","3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K", "A"};
    static String[] suit = {"Spades","Hearts", "Clubs", "Diamonds"};
    public Card(String r, String s)
    {

    }
    public static void init(Card[] deck)
    {
        for(int x = 0; x<deck.length; x++)
        {
            Card newCard = new Card(rank[x%13], suit[x/13]);
            deck[x] = newCard;
        }
    }
    public static void swap(Card[] deck, int a, int b)
    {
        Card temp = deck[a];
        deck[a] = deck[b];
        deck[b] = temp;
    }
    public static void shuffle(Card[] deck)
    {
        Random rnd = new Random();
        for(int x = 0; x<deck.length; x++)
        {
            swap(deck, x, (rnd.nextInt(deck.length)));
        }
    }
    public static void print(Card[] deck)
    {
        for(int x = 0; x<deck.length; x++)
            System.out.println(deck[x]);
    }

    public static void main(String[] args) {
        // TODO code application logic here
        Card[] deck = new Card[52];
        init(deck);
        print(deck);
    }

Answer 1

你应该重写你的类Card的toString()方法。

public String toString()
{
return "I want to print this";
}