Exercise – 8 (Runtime Polymorphism)

Exercise – 8 (Runtime Polymorphism) 

a). Write a JAVA program that implements Runtime polymorphism 

import java.util.Scanner;
class One
{
int a,b;
void sum()
{
Scanner s=new Scanner(System.in);
System.out.print("Enter  a and b values:");
a=s.nextInt();
b=s.nextInt();
int sum=a+b;
System.out.println("Sum of two numbers in the class 'One' is:"+sum);

}

}
class Two extends One
{
int a=90,b=67;
int add;
void sum()
{
add=a+b;
System.out.println("Sum of the numbers in the class 'Two' is:"+add);
}

}
class Poly
{
public static void main(String args[])
{
One obj=new One();
obj.sum();
One t=new Two();
t.sum();

}

}


b). Write a Case study on run time polymorphism, inheritance that implements in above problem

Polymorphism:-

            Polymorphism is the process of performing the single task in different ways. Polymorphism is the Greek word . In which  ‘poly‘  means many and   ‘morphs ’  means  forms. It means  many forms .

Polymorphism is classified into two types they are-

1.      Static  or Compile time Polymorphism

2.      Dynamic  or Run time  Polymorphism

Runtime Polymorphism:-

            Runtime Polymorphism is also called as Dynamic polymorphism. It is the process of calling the Overriding methods in runtime rather than In compile time.

In  this process  the  overriding methods are called with reference of super class.

Explanation:-

            In the above program we use single inheritance two achieve the runtime polymorphism in our example.

We use two classes here. We call the base class with the reference of  the super class.

 We create different objects to the two classes and call the both base   class   as well as super class with reference of super class only.

So, Runtime polymorphism is achieved here.