Pular para o conteúdo principal

object relationships

Relationships between classes​

there are three main class relationships:

  • IS A
  • Part-of
  • Has-a

part-of​

In this relationship, one class object is a component of another class object.

part-of

aggregation​

Aggregation follows the hAS-a model. It creates a parent-child relationship, one class owining the object of another

  • In aggregation, the lifetime of the owned object does not depend on the lifetime of the owner

Composition​

  • in composition, the lifetime of the owned object depends on the lifetime of the owner