Java：找不到符号？

Question

当我尝试编译一个我编写的小程序来构建一副纸牌数组并打印它们时，我收到 6 个错误，所有这些错误都是“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

您的类中没有属性deck，请尝试像这样添加它：

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

Answer 2

你如何访问甲板，它没有定义。

class Deck {

Card deck;
int cardcount;
public Deck () {

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

……