what is polymorphism

[Nari]

hi
can anyone tell me little bit about polymorphism, early binding and late binding.
I have quiz tomorrow morning.:eek:

[Eranga]

It's a long story. Did you google it. There are lots of nice tutorials and articles available.

Java Guide - Polymorphism

[Musten]

Yes its a long story indeed. Since you have a quiz here is brief description about Polymorphism.

There are two types, Static polymorphism ( also called compile time polymorphism) and Dynamic polymorphism (also called run-time polymorphism).

Method overloading is nothing but static polymorphism. Calls to overloaded methods are resolved by the compiler at compile time, hence called static binding.

Dynamic binding usually comes into picture when you have a sub class overriding a method of the super class. In such case if a base class reference is used to call the overridden method, the version of method to be invoked (i.e. the base class version or the child class version) is decided by the JVM, depending on the object the reference is pointing to. This is done at run time and hence called dynamc binding.

Please go through an example for better understanding.

[Eranga]

Yep, there is a simple example included in the link I have provided.

[Nari]

thanks its was helpful.....i think i did well on this quiz.
but don't know about professor :rolleyes:

i am glad i joined this community.

[Eranga]

Wish you all the best with your quiz.