In Java What is the benefits of Polymorphism concept

About Polymorphism:

Polymorphism contains two words : Poly and Morphism. Poly means many and morphism means behaviour.The ability of an object to take on different forms is known as polymorphism. Polymorphism is the capability of a method to do different things based on the object that it is acting upon.

Polymorphism is a programming language feature that allows values of different data types to be handled using a uniform interface.We can see the most common use of polymorphism in OOP so, when a parent class reference is used to refer to java training center bangalore a child class object.

Any Java object that can pass more than one IS-A test is considered to be polymorphic. In Java,

all Java objects are polymorphic since any object will pass the IS-A test for their own type and

for the class Object.

We know that only possible way to access an object is through a reference variable. A reference

variable can be of only one type. Once declared, the type of a reference variable cannot be changed.

The reference variable can be reassigned to other java course in bangalore objects provided that it is not declared final. The type of the reference variable would determine the methods that it can call on the object.

We create the reference variable for class as well as for interface.

Polymorphism exists in three distinct forms in Java:

• Method overloading
• Method overriding through inheritance
• Method overriding through the Java interface

Types of Polymorphism:

1. Compile Time Polymorphism
2. Run Time Polymorphism

Compile Time Polymorphism: When method binding happens at compile time is known as compile time polymorphism or static binding.Method binding means when method call get attach with method body.

For achieving Static binding java/j2ee classes bangalore Method Overloading is necessary.

Note: Method Overloading means same method name but differs in number of parameters, types of parameters and position of parameters.

Run Time Polymorphism : When method binding happens at run time is known as run time polymorphism or dynamic binding.For getting dynamic binding inheritance,overriding and upcasting is necessary.

If any one property not there we can’t get the run time polymorphism.

Types of Polymorphism:

1. Compile Time Polymorphism
2. Run Time Polymorphism

Difference between Compile Time and Run Time Polymorphism

1. During compile time source code changes into executable code.but during run time executable code is used to give output.
2. Error present during compile time could be compiled Advanced java training in bangalore without error,only syntax of code has to be correct.

But if logic of code is not correct then it will be compiled successfully but gives error during runtime.

3.Error during compile time is due to syntax error but error during runtime is due to logical error.

Need Of Polymorphism :

1. The basic reason behind polymorphism is that we can implement different behaviours of the same object depending upon the reference type passed to an object.
2. jdbc,servlets,jsp have come through polymorphism,if not there we have to remember all dependent classes related to DB,Servers...to use in our java coding
3. Polymorphism enables us to best core java training in bangalore define one or more methods to have the same name but differs in number of parameters and method types.

If we do not have polymorphism in Java then we cannot overload methods.

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