[Dart 문법 #8] 상속

1. 상속은 is다.

// 상속

class Burger {
  String name;
  Burger(this.name);
}

// is
class ChickenBurger extends Burger {
  int price;
  ChickenBurger(this.price, String name) : super(name);
}

class ChickenBurger2 extends Burger {
  ChickenBurger2(super.name);
}

// 가장 많이 쓰는 방법
class ChickenBurger3 extends Burger {
  int price;
  String? color;
  ChickenBurger3(this.price, this.color, String name) : super(name);
}

void main() {
  ChickenBurger3 b3 = ChickenBurger3(1000, null, "치킨버거");
  Burger b = ChickenBurger3(1000, null, "치킨버거2");
  print(b3.name);
  print(b3.price);
  print(b3.color);
  print(b.name);
}

2. 주의점