In OOP, IS-A relationship is completely inheritance . This means, that the child class is a type of parent class. For example, an apple is a fruit. So you will extend fruit to get apple.
Read moreWhat are the relationships in Java?
In Java, we have two types of relationship: Is-A relationship: Whenever one class inherits another class, it is called an IS-A relationship. Has-A relationship: Whenever an instance of one class is used in another class, it is called HAS-A relationship.
Read moreWhat is the difference between aggregation and association in Java?
Association refers to “has a” relationship between two classes which use each other. Aggregation refers to “has a”+ relationship between two classes where one contains the collection of other class objects.
Read moreIs a relationship aggregation or composition?
1. Association between two objects that defines the “has-a” relationship is referred to as Aggregation . A specific type of Aggregation that implies ownership is referred to as Composition.
Read moreWhat is composition in oops?
Composition is one of the fundamental concepts in object-oriented programming. It describes a class that references one or more objects of other classes in instance variables . This allows you to model a has-a association between objects.
Read moreWhat is composition in Java with example?
A composition in Java between two objects associated with each other exists when there is a strong relationship between one class and another . Other classes cannot exist without the owner or parent class. For example, A ‘Human’ class is a composition of Heart and lungs. When the human object dies, nobody parts exist.
Read moreWhat is aggregation in C++ with example?
In C++, Aggregation is used to represent the ‘HAS-A’ relationship between two objects . It is a type of association. If in a process, one class defines another class as any entity reference then it is known as Aggregation. With the help of aggregation, you can also reuse the class.
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