Question

i’m trying to create a new class that inherits from an abstract superclass (contains three abstract methods). The issue is that netbeans gives me a warning : add @override annotation. why should i do this (add this annotation) if i’m not overriding any method. What’s the problem ?

Superclass is

abstract class Vehicul {

   String denumireaVehiculului;
   float lungimeaMinimaVehicul;
   int numarulMinimDeLocuri;

   public abstract void mediulDeDeplasareAVehiculului();
   public abstract void nivelulDeSiguranta();

   // Constructor implicit
   Vehicul() {

       denumireaVehiculului = "Eu sint vehicul";
       System.out.println(denumireaVehiculului);

       lungimeaMinimaVehicul = 3.50f;
       System.out.println("Lungimea minima este "+lungimeaMinimaVehicul);

       numarulMinimDeLocuri = 2;
       System.out.println("Numarul minim de locure este "+numarulMinimDeLocuri);
   }
}

Subclass is

 public class Avion extends Vehicul {

 public void mediulDeDeplasareAVehiculului() {

}

 public  void  nivelulDeSiguranta() {

}

public String getDenumireaVehiculului() {

     return "Avion";

public void   afiseazaCineEsti() {

        System.out.println("Eu sunt un avion");

   }

}

Answer 1

Here is what the documentation for @Override says:

Indicates that a method declaration is intended to override a method declaration in a
superclass. If a method is annotated with this annotation type but does not override a
superclass method, compilers are required to generate an error message.

I know it is a bit confusing, because you are not actually overriding anything (you are implementing it!), but that is just how it works.