Polymorphism means many forms (ability to take more than one
form). In Polymorphism poly means “multiple” and morph means “forms” so
polymorphism means many forms.
1)Compile Time Polymorphism
2)Run Time Polymorphism
Compile Time
Polymorphism: Compile time polymorphism means we will declare methods with
same name but different signatures in the same class.
How to achieve them as shown below:
Example:
public class Overloading
{
//diff no of
paramteres
public int Method(int a)
{
return a;
}
public int Method(int a , int b)
{
return a + b;
}
// diff types
of parameters
public float Method(float a)
{
return a;
}
//diff order of parameters
public void Method(int b, float a)
{
}
public void Method(float a, int b)
{
}
}
Run Time Polymorphism: Run time
polymorphism also called as late binding or method overriding or dynamic
polymorphism. Run time polymorphism or method overriding means same method
names with same signatures in different class.
How to achieve run time polymorphism: In base class if we
declare methods with virtual keyword then only we can override those methods in
derived class using override keyword.
