1.Acquiring the properties of one class into another class.

If we want to achieve inheritance we need to use either extends or implements.

There are 5 types of inheritance in java.

*.Single inheritance.

*.multilevel inheritance.

*.Hyrarichal inheritance.

*.Hybrid inheritance.

*.multiple inheritance. In java multiple inheritance is not supported, but If we want achieve multiple inheritance we can do that by using interfaces.

2.It is a process of performing multiple tasks with the same time.

there are two types of polymorphisms are there.

1.Compiletime polymorphism.(Method overloading)

2.Runtime polymorphism.(Method overriding)

method overloading:Writting two are more methods with same class having same method name with different parameters.

Method Override:Writing two are more methods in two different classes having same method name ,same parameter,same return type.