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.
Read moreWhat is the difference between is a and has a relationship in Java?
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
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