Java 对象实例未显示toString方法中的值

我试图做的是从我的两个数组中获得一个随机值，我已经成功地做到了。我的问题是，当从我的Card类创建对象的实例时，我没有收到正确的输出。我希望我的输出类似于“红桃2”或“黑桃杰克”。相反，我没有输出，但代码运行成功

代码如下：

import java.util.Random;

public class Card {
    private static final String deckRanks[] = {"King", "Queen", "Jack", "Ace", "2", "3", "4", "5", "6", "7", "8", "9", "10"};
    private static final String deckSuits[] = {"of Diamonds", "of Spades", "of Hearts", "of Clubs"};

    public static void main(String[] args) {

    }

    public static String getRandomCard(){ 
        String card;
        Random cardSelector = new Random();

        int randomRank = cardSelector.nextInt(deckRanks.length);
        int randomSuit = cardSelector.nextInt(deckSuits.length);

        card = deckRanks[randomRank] + " " + deckSuits[randomSuit];
        return card;
    }

    @Override
    public String toString(){
        return getRandomCard();
    }
}

以及具有Card对象实例的类：

public class CardHand {
    public static void main(String[] args) {
        Card cards = new Card();

        cards.getRandomCard();
    }
}

---

CardHand类中的主方法不会显示随机选择的卡

它应该看起来像下面这样

public class CardHand {
    public static void main (String[] args) {
        // create a new Card
        Card card = new Card();
        // show the output of the Card's toString() method in the console
        // remember that getRandomCard() is called when we call toString()
        System.out.println("Random card is: "+card.toString());
    }
}

---

您正在运行

CardHand

或

Card

？因为

Card.main（）

为空。