在 Java 中选择一张随机卡

Question

我是 java 编程的新手，并已开始创建扑克游戏。到目前为止，已经创建了卡片和套牌，但我希望能够 select 随机卡片，但我不想洗牌。

到目前为止，这是我的代码：

import java.util.ArrayList;
import java.util.List;


public class PockerMain {

    public PockerMain() {
        // TODO Auto-generated constructor stub
    }

    public static void main(String[] args) {
        List<PokerCard> deck = cardDeck();
        for (int i = 0; i < deck.size(); i ++)
        {
            PokerCard card = deck.get(i);
            System.out.println(card);
        }

    }
    private static PokerCard createCard (short suit, short rank)
    {
        PokerCard card = new PokerCard (suit, rank);
        return card;
    }
    private static List<PokerCard> cardDeck ()
    {
        List<PokerCard> deck = new ArrayList<PokerCard> ();
        for (int i = 0; i < 4; i ++)
        {
            for (int j = 0; j < 13; j ++)
            {
                PokerCard card = createCard ((short)i, (short)j);
                deck.add(card);
            }

        }
        return deck;
    }
}

Answer 1

尝试使用 Random.nextInt，它将给出 0 到 n-1 之间的随机数。所以像：

Random random = new Random();
int nextCardToPick = random.nextInt(deck.size());//get random number in range 0 - deck.size (assuming 52 cards then it will give value between 0 -51)
System.out.println(deck.get(nextCardToPick));//access by index

Answer 2

不使用随机对象： PokerCard rCard = deck.get((int)(Math.random()*deck.size()));

在 Java 中选择一张随机卡

Selecting a Random Card in Java

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