英语翻译

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上传时间：2015-05-12
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英语翻译

One common problem occurring during the software development is how to divide a big system into multiple smaller systems. Division is an important method to control software complexity. In the structured method, how to decompose functions is considered, while in the OO method, it is how to put related classes together rather than functional division of the system that is considered. Package（包） is a very important mechanism during the development of big-size software. Elements in package are not limited to class, and they can be any UML modeling elements. Package is like a “container”, which can be used as related elements in the organization model to make it easier to understand.

如何把一个大的系统分解成许多小的系统是软件开发中的一个常见问题。分解是非常重要的方法对控制软件复杂性来说。在结构化方法中，考虑的是如何对功能进行分解，而在OO方法中，需要考虑的是如何把相关的类放在一起重要于对系统的功能进行分解。包在开发大型软件系统时是一个非常重要的机制，包中的元素不仅仅限于类，可以是任何UML建模元素。包就像一个“容器”，可用于组织模型中的相关元素，以便更容易理解。

Class refers to descriptors of an object group with similar structures, behaviors and relations. Generally speaking, relations of classes include association, aggregation, combination, generalization and dependence. Combine classes and relations between them we can get class diagram.

Class diagram can include modeling elements like interfaces, packages and relations; it can also include objects and instances. Class, object and their relation are the basic elements of the OOT (Object Oriented Technology), which can be regarded as the core of UML. Class diagram not only demonstrates information structure, but also describes system behaviors.

类是具有相似结构、行为和关系的一组对象的描述符。一般说来，类之间的关系有：关联、聚集、组合、泛化、依赖等。类加上它们之间的关系就构成了类图，类图中可以包含接口、包、关系等建模元素，也可以包含对象、链等实例。类、对象和它们之间的关系是面向对象技术中最基本的元素，可以说是UML中的核心。类图不仅显示了信息的结构，同时还描述了系统的行为。

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上传者：刘振闻|上传时间：2015-05-12|密次下载

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上传者：刘振闻
|
上传时间：2015-05-12
|
密次下载