What is uses a relationship in Java?

Dependence (Uses-A) Relationship in Java When we create an object of a class inside a method of another class , this relationship is called dependence relationship in Java, or simply Uses-A relationship. In other words, when a method of a class uses an object of another class, it is called dependency in java.

Composition is a restricted form of Aggregation in which two entities are highly dependent on each other . It represents part-of relationship. In composition, both entities are dependent on each other. When there is a composition between two entities, the composed object cannot exist without the other entity.

An IS-A relationship is inheritance. The classes which inherit are known as sub classes or child classes. On the other hand, HAS-A relationship is composition. 15 Eki 2018