/**
 * A class that maintains information on a book.
 * This might form part of a larger application such
 * as a library system, for instance.
 *
 * @author Hallgeir
 * @version 1, 2014
 */
class Book extends Produkt
{
    // The fields.
    public String author;
    private static int  numberOfBooks = 0;

    /**
     * Set the author and title fields when this object
     * is constructed.
     * @param author name on author
     * 
     */
    public Book(String author, String title, int price)
    {
        super(title, price);
        this.author = author;
        numberOfBooks++;
        
    }
      
     /**
     * This method prints all the information abouta book  
     */
    public void printDescription()
    {
//        System.out.println("Title    :" + title);    
        System.out.println("Author   :" + author);
//        System.out.println("Price    :" + price);
        System.out.println("");
    }

     /**
     * This method returns the number of books (+)
     * @return    numberOfBooks
     * Hallgeir: What about cohesion?
     */
    public int getNumberOfBooks()
    {   // Hallgeir: What about cohesion here? 
        System.out.println ("Number of Books is " + numberOfBooks);
        return numberOfBooks;
        
    }

    
    public String getProduktType() {
        return "Book";
    }    
}