Java中的stackoverflow错误

Question

我是Java的新手。我正在编写一个类，其中构造函数必须检查price参数并确保它不是负数。如果它是负数，则必须将价格设置为零。我检查价格时收到stackoverflow错误。我可以为我做错的事寻求帮助吗？

public class Book
{
    private String title;
    private String author;
    private String isbn;
    private int pages;
    private boolean pback;
    private double price;

    /**
     * Constructor for objects of class Book
     */
    public Book(String bookTitle, String bookAuthor, String bookCode, int bookPages, boolean paperback, double bookRetail)
    {
        title = bookTitle;
        author = bookAuthor;
        isbn = bookCode;
        pages = bookPages;
        pback = paperback;
        price = bookRetail;
    }

    /**
     * @returns title
     */

    public String gettitle()
    {
        return title;
    }

   /**
    * @returns author
    */

    public String getauthor()
    {
        return author;
    }

   /**
    * @returns ISBN#
    */

   public String getisbn()
    {
        return isbn; 
    }

   /**
    * @return number of pages
    */

   public int getpages()
    {
        return pages;
    }

   /**
    * @return is book paperback
    */

   public boolean getpback()
    {
        return pback;
    }

   /**
    * @return retail price
    */

   public double getprice() 
   {
       if(getprice() < 0)
       {
           return 0;
       } 
       else
       {
           return price;
       }

    }
}

Answer 1

您的getprice()方法将自行调用而不是进行检查price。在这种情况下，这导致无限递归。