Difference Between Method Overloading and Method Overriding in Java

Overriding is a feature in an object-oriented programming language that allows redefining the parent class method in the child class (Subclass).

The Following conditions must met for overriding method:

• Method name: Child Class method must have the same method name as in parent class method.
• Method argument: Child Class method must have the same method argument as in parent class method.
• Return Type: Child Class method must have the same return type as in parent class method.
• Relationship: There must be a relationship (inheritance) defined between parent and child class.

  // Base (Parent) Class
class Vehicle {
    
	void move()
	{
		System.out.println("Vehicle Move..");
	}
}

// Inherited class
class Car extends Vehicle {

// This method overrides move() of Parent Class Vehicle
	@Override
	void move()
	{
		System.out.println("Car move");
	}
}

// Inherited class
class Truck extends Vehicle {
	// This method overrides move() of Parent Class Vehicle
	@Override
	void move()
	{
		System.out.println("Truck move");
	}
}

public class OverRiding {

 
    public static void main(String[] args) {

     
     // Step 1   
     Vehicle vehicle = new Vehicle();
     vehicle.move();
     
     //Output: Vehicle Move..
     
  
      // Step 2   
     Vehicle vehicleCar = new Car();
     vehicleCar.move();
     //OutPut:  Car move
  
     
     
     // Step 3   
     Vehicle vehicleTruck = new Truck();
     vehicleTruck.move();
     //Output: Truck move
    }

}

In Steps 2 & 3 Object Reference is the Paranet class Vehicle which Refers to the child class Car & Truck. During runtime, it looks for the Child class method move and executes. This feature is known as POLYMORPHISM.

In this post we are going to learn the Difference Between Method Overloading and Method Overriding in Java and related concepts with examples so please continue reading.