Java:找不到符号？

当我试着编译一个我写的小程序来构建一组卡片的数组并打印它们时，我得到了6个错误，所有这些都是找不到符号的错误。有人能检查一下我的代码并找出错误吗？谢谢

编译输出：

sudhakar@sudhakar-Dell-DXP061 ~/deck $ javac doDeck.java Deck.java Card.java
doDeck.java:7: cannot find symbol
symbol  : variable deck
location: class carddeck.Deck
        System.out.println(mydeck.deck[x].getRankString() + " of " + mydeck.deck[x].getSuitString());
                                 ^
doDeck.java:7: cannot find symbol
symbol  : variable deck
location: class carddeck.Deck
        System.out.println(mydeck.deck[x].getRankString() + " of " + mydeck.deck[x].getSuitString());
                                                                           ^
Deck.java:4: cannot find symbol
symbol  : variable deck
location: class carddeck.Deck
    deck = new Card[51];
    ^
Deck.java:10: cannot find symbol
symbol  : variable deck
location: class carddeck.Deck
            this.deck[cardcount] = new Card(suitit,rankit);
                ^
Deck.java:10: cannot find symbol
symbol  : variable cardcount
location: class carddeck.Deck
            this.deck[cardcount] = new Card(suitit,rankit);
                      ^
Deck.java:11: cannot find symbol
 symbol  : variable cardcount
location: class carddeck.Deck
                    cardcount++;
                    ^
6 errors

Deck.java：

package carddeck;
class Deck {
    public Deck () {
        deck = new Card[51];
        int cardcount = 0;
    }
     public void buildDeck () {
        for (Card.Rank rankit: Card.Rank.values()) {
            for (Card.Suit suitit: Card.Suit.values()) {
                this.deck[cardcount] = new Card(suitit,rankit);
                cardcount++;
            };
        };
    };
}

您的类中没有属性组，请尝试这样添加：

class Deck {
    private Card[] deck = null;
    public Deck () {
        deck = new Card[51];
        int cardcount = 0;
    }
//...
}

---

你是如何进入甲板的，它还没有定义

class Deck {

Card deck;
int cardcount;
public Deck () {

    deck = new Card[51];
    cardcount = 0;
}

---

..…

您没有声明组成员变量。cardcount也不是字段。谢谢。我不知道你不能在构造函数中初始化变量。当然你可以在构造函数中初始化变量，但你必须先声明这些变量。您忘记声明变量了。