Polymorphism in Java

Level : Intermediate
Mentor: Shailendra Chauhan
Duration : 00:02:00

What is Polymorphism in Java?

Polymorphism in Java is a task that accomplishes the same task in multiple ways.

Types of Polymorphism in Java

There are two types of polymorphism in Java:

  1. Compile time Polymorphism in Java
  2. Run time Polymorphism in Java

1. Compile-time polymorphism in Java

Compile time polymorphism in Java deals with the compile time problem by using "method overloading" and "constructor overloading."

Method Overloading in Java.

In Java, method overloading refers to two or more methods or functions in the same class that have the same name but different parameters and arguments.

Constructor Overloading in Java

Constructor overloading occurs in Java when many constructors are declared within a class but with different parameters. When a new keyword is used to create an object in a class, a constructor is generated within that class.

2. Runtime polymorphism in Java

Runtime Polymorphism uses overriding to specify how run time is depicted.

Method Overriding in Java

This Java method redefines a superclass method by giving it the same name, parameters, and data types in a subclass.

What are polymorphism variables?

Polymorphic variables are those that can refer to distinct values under different conditions. In Java, object variables (also known as instance variables) represent polymorphic variable behavior.

Why do Java programmers use polymorphism?

Java's polymorphism makes it simple to write methods that can correctly handle a wide range of functions with the same name. Polymorphism can help us improve our code's consistency.

Advantages of Polymorphism in Java

  • Reusable classes can be defined, tested, and implemented.
  • Reusing existing code allows programmers to save time.
  • Changes can be done without affecting the original code.
  • Allows the storage of several data values in a single variable.
  • A subclass can make independent changes to values inherited from a superclass.
  • Changes made to the subclass variable do not affect the superclass or other subclasses.
  • Debugging is made easier with fewer lines of code.
  • Makes it easier for programmers to identify and resolve issues.
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