OOPS

Question

What is difference between polymorphism and overloading

Answer 1

Polymorphism means to have a same method with different implementations.

class Animal
{
public void sound(){}
}

class Dog extends Animal
{
public void sound() {
System.out.println("Woof");
}
}

overloading means to have the same method name but different parameter.

int sum (int a, int b)
{
return a + b;
}

int sum (int a, int b, int c)
{
return a + b + c;
}

double sum (double a, double b)
{
return a + b;
}

Answer 2

Function overloading is a way to implement polymorphism to implement in Java

Answer 3

So far I understand
Function overloading mean same function is accepting different number of parameters

While

Polymorphism mean different forms at the different places.

As here we all are Sololearner but here after we are student/teacher/programmer/many to name

Answer 4

Overloading is one of the concepts of polymorphism

Polymorphism = Overloading + Overriding

Overloading - Method name is same but there is a change in

No of parameters
Order of parameters
Size of parameters

We can overload method and constructor

Overriding : Method is same but implementation will be in subclass

If child class is not satisfied with the definition given by parent class
Child class will write its own definition

We can override instance method in all cases
We can override static method until and unless it is not having super keyword
We cannot override final method
We cannot override a constructor

Note : polymorphism can be implemented fully with the support of inheritance

If there is no inheritance there is no polymorphism