Difference Between Overloading and Overriding

Difference Between Overloading and Overriding in Java

Method overloading deals with the notion of having two or more methods in the same class with the same name but different arguments.
Method overriding means having two methods with the same arguments, but different implementations. One of them would exist in the parent class, while another will be in the derived, or child class.

In case of method overloading, parameter must be different. In case of method overriding, parameter must be same.

.In java, method overloading can't be performed by changing return type of the method only. Return type can be same or different in method overloading. But you must have to change the parameter. Return type must be same or covariant in method overriding.

Example Method Overloading in Java

class OverloadingExample
{  
static int add(int a,int b)
{
return a+b;
}  
static int add(int a,int b,int c)
{
return a+b+c;
}  
}  

Example Method Overriding in Java

class Animal{  
void eat(){System.out.println("eating...");
}  
}  
class Dog extends Animal
{  
void eat()
{
System.out.println("eating bread...");
}  
} 

Difference between Overloading and Overriding in Java