What is the use of aggregation in Java?

When an object A contains a reference to another object B or we can say Object A has a HAS-A relationship with Object B, then it is termed as Aggregation. Aggregation helps in reusing the code . Object B can have utility methods and which can be utilized by multiple objects.

In Java, a Has-A relationship simply means that an instance of one class has a reference to an instance of another class or an other instance of the same class. For example, a car has an engine, a dog has a tail and so on .

An example of an aggregation is the group of people involved in a class action lawsuit . Aggregation is defined as the act of accumulating things or individuals. An example of aggregation is finding and organizing a group of people injured by harmful effects of a medicine.

Difference between association, aggregation, composition in Java AggregationCompositionClasses in relation can exist independentlyOne class is dependent on Another Independent class. The Dependent class cannot exist independently in the event of the non-existence of an independent class.Association, Composition and Aggregation in Java – Scaler Topics www.scaler.com › topics › association-composition-and-aggregation-in-java