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Java:在PC上编译包时出错

package java

green tea · 技术社区 · 4 年前

我在笔记本电脑上编译了一些java文件,现在我试着在电脑上打开它们,但我只收到了包不起作用的错误消息。例如,文件夹“网店”中有两个文件:

  package webshop;

     public abstract class Article {
        int artCode;
        float price;
        int stock;
        
        public void buy (int n) {
            stock += n;
        }
    
        public void sell (int n) {
            stock -= n;
        }
    
        public boolean available () {
            return stock > 0;
        }
    
        public String getDescription () {
            return "ArtNr. " + artCode + " â¬" + price;
        }
    
        public Article (int ac, float p) {
            artCode = ac;
            price = p;
            stock = 0;
        }
    }

和

package webshop;
import webshop.Article;

public abstract class Book extends Article {
    String author;
    String title;

    public String getDescription () {
        return getKind() + " '" + title + "' von " +
            author + "; " + super.getDescription();
    }

    public abstract String getKind ();

    public Book (int ac, float p, String a, String t) {
        super(ac, p);
        author = a;
        title = t;
    }

    public Book (int ac, String a, String t) {  // construct a free book
        super(ac, 0);
        author = a;
        title = t;
    }
}

现在,当我在电脑上编译Book.java时,我得到一个错误,即不存在任何包“网店”,但在我的笔记本电脑上,它运行得很好。有什么想法吗?这两个文件都在同一个名为webshop的文件夹中。贪婪