Introduction
What is Polymorphism?
Polymorphism means same operation may behave differently on different classes.
- Example of Compile Time Polymorphism:
Method Overloading
- Example of Run Time Polymorphism:
Method Overriding
Example of Compile Time Polymorphism
- Method Overloading: Method with
same name but with different arguments is called method overloading.
- Method Overloading forms compile-time
polymorphism.
Example of Method Overloading:
class A1
{
void
hello()
{
Console.WriteLine("Hello");
}
void
hello(string s)
{
Console.WriteLine("Hello
{0}",s);
}
}
Example of Run Time Polymorphism
- Method Overriding: Method
overriding occurs when child class declares a method that has the same type
arguments as a method declared by one of its superclass.
- Method overriding forms Run-time
polymorphism.
Note: By default functions are not virtual in C# and so you need to write
“virtual” explicitly. While by default in Java each function are virtual.
Example of Method Overriding:
Class
parent
{
virtual void hello()
{
Console.WriteLine("A D
Patel");
}
}
Class child :
parent
{
override void hello()
{
Console.WriteLine("R A
Patel");
}
}
static void main()
{
parent objParent =
new child();
objParent.hello();
}
//Output
R A Patel