不懂是什麼cannot be resolved to a variable

问题遇到的现象和发生背景

我打算一個卡牌遊戲
有兩種卡,分別是ValueCard和FunctionCard,它們都有數字
FunctionCard還多了加減乘的功能,我先用String把三種功能分數
ValueCard類和FunctionCard類都是extends Card類的,因為它們都有數字

然後我在Deck 類裡面 放了ValueCard和FunctionCard的物件
當生成Deck 物件就會生成40張ValueCard和48張FunctionCard個Deck 裡面的變量

用代码块功能插入代码，请勿粘贴截图

class Card {
    private int value;

    public Card(int value) {
        this.value = value;
    }

    public void setValue(int value) {
        this.value = value;
    }

    public int getValue() {
        return value;
    }

    public String toString() {
        return "[" + getValue() + "]";
    }
}

class ValueCard extends Card {
    public ValueCard(int value) {
        super(value);
    }

    @Override
    public void setValue(int value) {
        super.setValue(value);
    }

    @Override
    public int getValue() {
        return super.getValue();
    }

    @Override
    public String toString() {
        return super.toString();
    }
}

class FunctionCard extends Card {
    private String function;

    public FunctionCard(int value, String function) {
        super(value);
        setFunction(function);
    }

    @Override
    public void setValue(int value) {
        super.setValue(value);
    }

    @Override
    public int getValue() {
        return super.getValue();
    }

    public void setFunction(String function) {
        this.function = function;
    }

    public String getFunction() {
        return function;
    }
}

class Deck {
    private Card[] vCard = new ValueCard[40];
    private Card[] fCard = new FunctionCard[48];

    public Deck() {
        int k = 0;
        while (k < vCards.length)// Generate 1-9, repeat 4 times, a total of 40 Value Cards.
            for (int i = 0; i < 9; i++) {
                vCard[k++] = new ValueCard(i);
            }
        k = 0;
        int num[] = { -1, 0, 2 };
        while (k < 19)// Generate 1-9, repeat 2 times, a total of 18 Add Cards.
            for (int i = 1; i <= 9; i++) {
                fCard[k++] = new FunctionCard(i, "+");
            }
        while (k > 18 && k < 36)// Generate 1-9, repeat 2 times, a total of 18 Deduct Cards.
            for (int i = 1; i <= 9; i++) {
                fCard[k++] = new FunctionCard(i, "-");
            }
        while (k > 35 && k < fCards.length)// Generate -1, 0, 2 , repeat 4 times, a total of 12 Multiply Cards.
            for (int i = 0; i <= 2; i++) {
                fCard[k++] = new FunctionCard(num[i], "*");
            }
    }
}

class Player {
    private Card[] vCard = new ValueCard[5];
    private Card[] fCard = new FunctionCard[5];
}

class Game {
    public static void main(String[] args) {
        Deck d = new Deck();
    }
}

运行结果及报错内容

Exception in thread "main" java.lang.Error: Unresolved compilation problems:
vCards cannot be resolved to a variable
fCards cannot be resolved to a variable

    at Deck.<init>(Game.java:77)
    at Game.main(Game.java:101)

我的解答思路和尝试过的方法

我試過用全局變量,和Deck 類的變量改成pubile都是報相同的錯誤

我想要达到的结果

當生成Deck物件就會產生ValueCard和FunctionCard的變量,並可以放入Player類的變量裡

你应该是写错变量名了 ，你定义的是 vCard，你这里却用的 vCards

file:///home/pz/Pictures/snapshot/Screenshot_20221204_000229.png

接上面大佬回答的，检查你的while循环的条件，下面还有用了一个fCards，理论上来说idea的智能性应该在编写是不会出现这种失误