Some notes about Class Modeling

最新推荐文章于 2024-01-21 00:53:42 发布

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#class #associations #structure

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本文解释了面向对象设计中链接与关联的概念。链接是对象之间的物理或概念连接，而关联则是描述一组具有共同结构和语义的链接。文章通过实例说明了如何通过链接将不同对象联系起来，并介绍了关联如何定义这些链接的特性。

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Associations ---------- Links

Class ---------- instances(objects)

A link is a physical or conceptual connection among objects. For example, Joe Smith WorksFor Simplex company. Most links relate two objects, but some links relate three or more objects.

An association is a description of a group of links with common structure and common semantics. For example, a person WorksFor a company. The links of an assiciation connect objects from the same classes. An association describes a set of potential links in the same way that a class describes a set of potential objects. Links and associations often appeat as verbs in problem statements.