How do you identify Aggregation and composition in Java?

In Aggregation, objects can remain in the scope of a system without each other. In a composition relationship, objects cannot remain in the scope of a system without each other .

Aggregation implies a relationship where the child can exist independently of the parent . Example: Class (parent) and Student (child). Delete the Class and the Students still exist. Composition implies a relationship where the child cannot exist independent of the parent.

Composition is a strong Association. 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.