order.java

这是一个coffee店管理系统,Gourmet咖啡是一个商店

import java.util.*;
class Order 
{
	private Vector items;

	public Order(){
		 items=new Vector();
	}

	public  void addItem(OrderItem orderItem){
		items.add(orderItem);	
	}

	public void removeItem(OrderItem orderItem){
		items.removeElement(orderItem);
	}
	
	public OrderItem getItem(Product product){
		for (Iterator i = getItemsIterator(); i.hasNext();) {
			
			OrderItem orderItem = (OrderItem) i.next();
			
			if (orderItem.getProduct().equals(product)) {
				
				return orderItem;
			}
		}
			return null;
		
		
	}

	public Iterator getItemsIterator(){
		return items.iterator();
	}
	
	public int getNumberOfItems(){
		return items.size();
	}

	public double getTotalCost(){
		double totalCost = 0;
        for(Iterator iterator = items.iterator(); iterator.hasNext();)
            totalCost=totalCost + ((OrderItem)iterator.next()).getValue();
			return totalCost;
	}
}