abstract-classes

readme.md

abstract-classes

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main.dart

void main() {
  PowerGrid grid = PowerGrid();
  NuclearPlant nuclear = NuclearPlant();
  SolarPlant solar = SolarPlant();

  grid.addPlant(nuclear);
  grid.addPlant(solar);
}

class PowerGrid {
  List<PowerPlant> connectedPlants = [];

  addPlant(PowerPlant plant) {
    bool confirmation = plant.turnOn('6 hours');
    connectedPlants.add(plant);
  }
}

abstract class PowerPlant {
  int costOfEnergy = 0;
  bool turnOn(String duration);
}

class NuclearPlant implements PowerPlant {
  int costOfEnergy = 100;
  bool turnOn(String operationTime) {
    print('☢️ Nuclear plant on for $operationTime at a cost of $costOfEnergy');
    return true;
  }
}

class SolarPlant implements PowerPlant {
  int costOfEnergy = 50;
  bool turnOn(String operationTime) {
    print('🌞 Solar plant on for $operationTime at a cost of $costOfEnergy');
    return true;
  }
}