package chapter02;

class BicycleDemo {
  public static void main(String[] args) {

    // Create two different Bicycle objects
    Bicycle bike1 = new Bicycle();
    Bicycle bike2 = new Bicycle();

    // Invoke methods on those objects
    bike1.changeCadence(50);
    bike1.speedUp(10);
    bike1.changeGear(2);
    bike1.printStates();

    bike2.changeCadence(50);
    bike2.speedUp(10);
    bike2.changeGear(2);
    bike2.changeCadence(40);
    bike2.speedUp(10);
    bike2.changeGear(3);
    bike2.printStates();
  }
}

class Bicycle {

  int cadence = 0;
  int speed = 0;
  int gear = 1;

  void changeCadence(int newValue) {
    cadence = newValue;
  }

  void changeGear(int newValue) {
    gear = newValue;
  }

  void speedUp(int increment) {
    speed = speed + increment;
  }

  void applyBrakes(int decrement) {
    speed = speed - decrement;
  }

  void printStates() {
    System.out.println("cadence:"+cadence+" speed:"+speed+" gear:"+gear);
  }
}

