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Asked On2017-05-16 09:42:29 by:metaphor

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The words “class” and “object” are often used as if they are the same, but actually they are not. An object is someone or something, like the person “John” or this document. It can be concrete like “The Eiffel Tower” or abstract like “France”.
Formally put, an object is something with properties, relationships, behavior and an identity.
A class is a definition of objects that share the same kind of properties,
relationships and behavior, like the class Employee may define the properties
“name”, “age” and “employee number” and may define a relationship with the
class Department. An object is a specific instance of a class, like “John” may be an instance of the class Employee.
In the context of system development we define classes with properties and
behavior that are relevant for the System under Discussion (SuD). Class Modeling is the task of specifying these classes using a specific language in which the properties are called attributes, the relations are called associations and behavior is defined as operations.
UML class modeling is platform independent, so it is not about Java, nor C#. At some point classes are transformed to a platform specific technology, which may be Java classes, Enterprise Java Beans, ADF Business Components and so on.
However, as will be discussed later, there are there situations in which it makes sense to let the UML class model anticipate constraints of the
technology that is going to be used.


Answerd on:2017-06-27 Answerd By:prajwalamv

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