Pillars of flutter

1. ABSTRACTION
2. ENCAPSULATION
3. INGERITANCE
4. POLYMORPHISM

POLYMORPHISM 

By inheriting from parent class, we want to remove method and add some different method

so we use '@override' and then that method or func. is written

void main(){

  

  LevitatingCar myUnicorn = LevitatingCar();

  

  myUnicorn.drive();

}

class Car {

  int number_of_seats = 5;

  

  void drive(){                        // this drive not work on LevitatingCar

    print('wheels turn');                       class

  }

}

class LevitatingCar extends Car {

  

  @override                           // override remove drive() method of          void drive(){                       parent class Car and replace with              print('glide forwards');            this new drive() method

  

  }

}

void main(){

  

  SelfdrivingCar myNamor = SelfdrivingCar('Atlantis');

  

  myNamor.drive();

}

class SelfdrivingCar extends Car {

  

  String destination;

  

  SelfdrivingCar(String usersetDestination){

    destination = usersetDestination;

  }

  

  @override

  void drive(){

    super.drive();

    

    print('staring towards $destination');

  }

}

output

wheels turn staring towards Atlantis