Class and Interface Representation -
Class Relationship -
It defines how classes are connected or related to each other.
Association Relationship
It represents relationship b/w two classes where one is related to another in some way. It can be simple connection or have attributes associated with it.
Bidirectional Association Relationship
Both class can call each other
Unidirectional Association Relationship
This association is only in one direction. This means that one class knows about other, but the reverse may not be true.
Note - `Person` can call `Address`, but `Address` cannot call `Person`
Multiplicity Association Relationship
It describes the number of instances of one class associated with a single instance of another class.
Role - It defines the responsibility or purpose of the associated class in the context of relationship.
Aggregation and Composition Relationship
Both comes under has-a relationship
- Aggregation - One class can exist without other class
- Composition - One class cannot exists without other class
