java - 使用方法和多个类的一副纸牌

Question

我没有得到任何输出，也不确定从这里去哪里。

Design and implement a class called Card, which represents a standard playing card. Each card has a suit and a face value. Then, create a driver class that stores 52 objects of the Card class into an array. Include methods to shuffle the deck, deal a card and report the number of cards left in the deck. The shuffle method should assume a full deck. Your main method should deal each card from a shuffled deck, printing each card (suit and face value) as it is dealt.

这是我目前所拥有的:

    import java.util.Random;
public class card {
public static void main(String[] args) {}

    public class deck {


        int[] deck = new int[52];
        String[] suits = {"Spades", "Hearts", "Diamonds", "Clubs"};
        String[] ranks = {"Ace", "2", "3", "4", "5", "6", "7", "8", "9", "10", "Jack", "Queen", "King"};

        public void create() {//initialize cards
            for (int i = 0; i < deck.length; i++) deck[i] = i;
        }


        public void shuffle() {//deck shuffle
            for (int i = 0; i < deck.length; i++) {

                int index = (int) (Math.random() * deck.length);
                int temp = deck[i];
                deck[i] = deck[index];
                deck[index] = temp;
            }



                 //display all the cards!
                for (int i = 0; i < deck.length; i++)

                {
                    String suit = suits[deck[i] / 13];
                    String rank = ranks[deck[i] % 13];
                    System.out.println("Card number " + deck[i] + ": " + rank + " of " + suit);


                }


            }
        }

        }

Answer 1

在 Java 中，方法 main() 是代码开始运行的地方。您现在的 main 方法中没有任何内容:

public static void main(String[] args) {}

要让它做某事，将其更改为如下所示:

public static void main(String[] args) {
 deck myDeck = new deck();
 myDeck.create();
 myDeck.shuffle();
}

请注意，在 Java 中使用大写字母命名类是一种很好的做法。