Java：找不到符号？ [复制]

Question

当我尝试编译一个小程序时，我编写了一个构建一副纸牌数组并打印它们的小程序，我收到 6 个错误，所有这些都是“找不到符号”错误。有人可以检查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++;
            };
        };
    };
}

Answer 1

您的班级中没有 deck 属性，请尝试这样添加：

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

Answer 2

你是如何访问卡组的，它没有定义。

class Deck {

Card deck;
int cardcount;
public Deck () {

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

.....