40c4b67598f4001b1767ee232a2585d9

Internet 开发技术分章节代码和自己完成的课程设计全代码（在zuoye文件夹里）使用时

package bean;
import java.util.HashMap;
public class Car {
	private String userId;//用户的标识
	private HashMap items;//购物车中的物品
	public Car(){items=new HashMap();	}
	public void addItem(String id,int quantity)
	{  items.put(id,new Integer(quantity)); 	}
	public void removeItem(String id)
	{ items.remove(id);	}
	public void updateItem(String id,int quantity)
	{
		if(items.containsKey(id))items.remove(id);
		items.put(id,new Integer(quantity));
	}
	public HashMap getItems()
	{ return this.items;	}
	public void setUserId(String userId)
	{ this.userId=userId;	}
	public String getUserId()
	{ return this.userId;	}
	public void clear()
	{ items.clear();	}
}