Project 3

class Truck implements Vehicle {
    public void start() {
        System.out.println("starting truck engine...");
    }
    public void stop() {
        System.out.println("stopping truck engine...");
    }
}

class Starter {
    // static method, can be called without instantiating the class
    public static void startEngine(Vehicle vehicle) {
        vehicle.start();
    }
}

Vehicle tesla = new Car();
Vehicle tata = new Truck();

Starter.startEngine(tesla); // starting engine ...
Starter.startEngine(tata); // starting truck engine ...