Method overloading

• methods must have same name and different paramaters
• They may or may not have same return type/access modifiers and may or may not throw same/different exceptions.

Method overriding

• Must have same name and arguments
• Cant have lower access modifier For example if method in parent class has access modifier protected than method over riden in child class can have access modifier protected or public but cant be private
• Must not throw new or broader exceptions
• Must have same return type or covariant return type.

Example of covariant return type

Class Burgerfactory{
 public Burger createBurger{
 reurn new Burger();} //this returns an object of class burger
  }

 Class HealthyBurgerFactory extends Burgerfactory{
   public HealthyBurger createBurger{
    return new HealthyBurger();}

Class HeathyBurgerFactory returns an object of class HealthyBurger, where HealthyBurger is an child of class Burger .So when we overide the createBurger method in child class HealthyBurgerFactory it can either have same return type i.e Burger or a child return type of Burger that is HealthyBurger.