What is Aggregation and composition?

Aggregation means one object is the owner of another object. Composition means one object is contained in another object . The direction of a relation is a requirement in both Composition and Aggregation.

Difference between association, aggregation, composition in Java. Association in java is one of the types of relations between classes. It has two forms Aggregation(HAS-A) and Composition(Belongs-to). Aggregation is a relatively weak association, whereas Composition is a strong association .25 Ağu 2021

The composition is a design technique in java to implement a has-a relationship . Java Inheritance is used for code reuse purposes and the same we can do by using composition. The composition is achieved by using an instance variable that refers to other objects.