Java组成（has-a）关系澄清 [英] Java composition (has-a) relationship clarification

问题描述

我在理解组成概念时遇到麻烦。

I'm having trouble grasping the concept of composition.

我需要创建制造商类和产品类并使用组成。

I need to create a manufacturer class and a products class and use composition.

我是否在产品内部进行了引用，并在创建新产品时添加了制造商对象？

Do I make the has-a reference inside products and just add the manufacturer object when creating a new product?

推荐答案

这正是预期的目的，并且很有意义。制造商是产品的完全合理的属性，在对象中引用制造商似乎是合理的。

That is exactly what is intended, and it makes sense. The manufacturer is a perfectly reasonable property of a product, and it seems reasonable to have a reference to the manufacturer in the object.

关于您的列表，您并不是要求提供制造商的产品清单（至少据我所知）。因此，您不需要朝该方向前进的链接，因此也不需要您似乎要提及的列表。

About your list, you're not being asked to have a list of products given a manufacturer (at least as far as I can tell). So you don't need the link to go in that direction, and thus not the list you appear to be mentioning.

这篇关于Java组成（has-a）关系澄清的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！