Materi diagram kelas-implementasi-1

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Implementation UML Class
Diagrams

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Big questions
 What is UML?
 Why should I bother? Do people really use UML?
 What is a UML class diagram?
 What kind of information goes into it?
 How do I create it?
 When should I create it?

 Representing Static variable or static operation:
The static data is represented with an underline. Let’s
take the below example.
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 Association:
The association represents the static relationship
between two classes along with the multiplicity.
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 The unidirectional relationship shows that the source
object can invoke methods of the destination class. In
Java a possible example can be the instance variable of
source class referencing the destination class.
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 Bidirectional association
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Both use of ArrayList and Array is for
illustration purposes only

 Realization:
 This is related to the relationship between the class and
the interface. The realization is equivalent to the
“implements” keyword in Java
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Aggregation
 This shows “has a” relationship. It is a form of
association relationship. This relationship highlights
that a whole is made of its parts. So if a whole is
destroyed the part still remains.
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Composition
 This is again a whole or part relationship where if the
whole is destroyed then the part cannot exist
independently. Another important point about
Composition is that the part at any point in time can
have only one owner.
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Materi diagram kelas-implementasi-1

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