Polymorphism in Java смотреть онлайн

In this tutorial, we see how to implement polymorphism in Java. We first see how to refer child class using interface or base class reference.

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Polymorphism is the ability of an object to take on many forms. The most common use of polymorphism in OOP occurs when a parent class reference is used to refer to a child class object. An operation may exhibit different behavior in different instances. The behavior depends on the types of data used in the operation. It plays an important role in allowing objects having different internal structures to share the same external interface.

Polymorphism is extensively used in implementing inheritance. Different types of polymorphism in java. 1) Method Overloading 2) Method Overriding

In Java, it is possible to define two or more methods with same name in a class, provided that there argument list or parameters are different. This concept is known as Method Overloading.

Sometimes, child class has the same method as in base class. In such cases child class overrides the parent class method without changing code of the base class. This feature is known as method overriding.