Question

What is the difference between overriding a method and overloading a method with respect to method signatures?

Answer 1

Overloading ;- when two or more methods are in a same class having the same name but they have different signature then this concept is known as overloading.Different signature means different type of parameter, different no. of parameter or different return type.

consider an example;-

class M{

static void sum(int a ,int b){

System.out.println(a+b);

}

static void sum(int a ,int b , int c){

System.out.println(a+b+c);

}

public static void main(String[] args) {

sum(1,2);

sum(1,2,3);

}

}

as we can see two method having same name of sum and having no return type but different no. of parameter so it is overloading concept

Overriding :- when a subclass or child class modified the method of parent class then this concept is known as overriding . Both the method having the same name, same return type,same no. and same type of parameter,so overall means same signature.

consider an example

class X{
   
   public void e()
   {
      System.out.println("H");
   }
}
class Y extends X{
   
   public void e(){
      System.out.println("B");
   }
   public static void main( String args[]) {
      Y obj = new Y();
      
      obj.e();
   }
}