shoppingcartitem.java

来自「beginJsp2.0外文书籍源代码」· Java 代码 · 共 45 行

package com.wrox.shop;

/**
 * Models a shopping cart item consisting of a Book and a quantity.
 */
public class ShoppingCartItem 
{
  
  private final Book book;
  private int quantity;

  public ShoppingCartItem(Book book) 
  {
    super();
    this.book = book;
    this.quantity = 1;
  }
  
  public Book getBook() 
  {
    return book;  
  }
  
  public int getQuantity() 
  {
    return quantity;
  }
  
  public void setQuantity(int quantity) 
  {
    this.quantity = quantity;
  }

  public boolean equals(Object obj) 
  {
    return obj instanceof ShoppingCartItem &&
               equals((ShoppingCartItem)obj);
  }

  public boolean equals(ShoppingCartItem that) 
  {
    return this.book == that.book;
  }
}