Explaining OOP in Dart

main.dart

// classes and objects example
/*
class Car{
  int numberOfDoors=5;
  void drive(){
    print('wheels start turning');
  }

}
void main(){
  var myCar= Car();
  myCar.drive();
  myCar.numberOfDoors=4;
  print(myCar.numberOfDoors);
}*/
//Abstraction in Action
/*class Square{
  int? side;
  Square({this.side});

  int getPerimeter(){
    return side!*4;
  }
}
void main(){
  Square mySquare= Square(side: 10);
  print(mySquare.getPerimeter());
} */
//Encapsulation in Action
/*
class Human{
  int? _superSecretVariableForTheAge;
  Human();
  void setAge(int newAge){
    this._superSecretVariableForTheAge=newAge;
  }
  int get getAge{
    return _superSecretVariableForTheAge!;
  }
}
void main(){
  Human mySlef= Human();
  mySlef.setAge(33);
  print(mySlef.getAge);

  mySlef._superSecretVariableForTheAge=33;
  }
 */
//Inheritance
class Car{
  int numberOfSeats=4;
  void drive(){
    print('wheels turn.');
  }
}
class ElectricCar extends Car{
  int batteryLevel=100;
  void recharge(){
    batteryLevel=100;
  }
}
class SelfDrivingCar extends Car{
  String? destination;
  SelfDrivingCar(String userSetDestination){
    destination=userSetDestination;
  }
  @override
  void drive() {
    // TODO: implement drive
    super.drive();
    print('steering towards $destination');
  }
}
class LevitatingCAr extends Car{
  @override
  void drive() {
    // TODO: implement drive
    print('glide forwards');
  }
}
void main() {
  Car myNormalCar = Car();
  print(myNormalCar.numberOfSeats);

  myNormalCar.drive();

  ElectricCar myTesla= ElectricCar();
  myTesla.drive();

  SelfDrivingCar myWaymo = SelfDrivingCar("Nishtiman Bazzar");
  //polymorphism
  myWaymo.drive();

   LevitatingCAr myAeroMobil = LevitatingCAr();
   myAeroMobil.drive();
}