order.java

ssd3 exercise2 的题目和答案

// Decompiled by Jad v1.5.8f. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://www.kpdus.com/jad.html
// Decompiler options: packimports(3) 
// Source File Name:   Order.java

import java.util.ArrayList;
import java.util.Iterator;

public class Order
    implements Iterable
{

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

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

    public void removeItem(OrderItem orderitem)
    {
        items.remove(orderitem);
    }

    public Iterator iterator()
    {
        return items.iterator();
    }

    public OrderItem getItem(Product product)
    {
        for(Iterator iterator1 = items.iterator(); iterator1.hasNext();)
        {
            OrderItem orderitem = (OrderItem)iterator1.next();
            if(orderitem.getProduct().equals(product))
                return orderitem;
        }

        return null;
    }

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

    public double getTotalCost()
    {
        double d = 0.0D;
        for(Iterator iterator1 = items.iterator(); iterator1.hasNext();)
        {
            OrderItem orderitem = (OrderItem)iterator1.next();
            d += orderitem.getValue();
        }

        return d;
    }

    private ArrayList items;
}