java - 如何使用构造函数并打印

Question

我正在尝试创建一个简单的纸牌游戏，其中两名玩家会收到随机纸牌。我决定使用构造函数来使其简单并使用更少的空间。有人可以帮助我并解释如何在我的 Card 类的主程序中生成随机卡。

public class clsCard {

    private int value;
    private int rank, suit;
    private final int MaxFaceValue= 10;
    private static String[] suits = {"Joker","hearts","spades","diamond","clubs"};
    private static String[] ranks = {"Joker","Ace","2","3","4","5","6","7","8","9","10","Jack","Queen","King"};

    public clsCard(int suit, int rank)
    {
        this.rank= (int)(Math.random()*ranks.length);
        this.suit= (int)(Math.random()*suits.length);
    }

    public @Override String toString()
    {
        if(ranks[rank].equals("Joker") || suits[suit].equals("Joker"))
            return "Joker";
        else
        return ranks[rank] + " of " + suits[suit];
    }
    public int getRank()
    {
        return rank;
    }
    public int getSuit()
    {
        return suit;
    }   
}

Answer 1

首先，您需要所有卡片，然后从中随机选择。您可能需要一些基础类(class)才能做到这一点。这只是做到这一点的一种方法 - 创建一个套牌，例如:

import java.util.ArrayList;

public class Deck {

    private ArrayList cards;

    public enum Suit {Joker, Spade, Club, Heart, Diamond};

    public Deck() {
        cards = new ArrayList<Card>();

        // Add all appropriate cards
        for(int i = 1; i < 14; i++) {
            cards.add(new Card(i, Suit.Spade));
            cards.add(new Card(i, Suit.Club));
            cards.add(new Card(i, Suit.Heart));
            cards.add(new Card(i, Suit.Diamond));
        }

        cards.add(new Card(0, Suit.Joker));
        cards.add(new Card(0, Suit.Joker));

    }

    public Card dealRandomCard() {
        int random = (int)(Math.random()*cards.size());
        Card c = cards.get(random)
        cards.remove(random);
        return c;
    }

}

这也是一个 Card 类，展开:

public class Card {

    public Card(int i, Suit s) {

    }

}

然后您可以从那里进行构建。