What will be the output of this code?

What will be the output of this code?

class Engine {
  void start() { System.out.println("Engine started"); }
}
class Car {
  Engine engine = new Engine();
  void startCar() { engine.start(); }
}
public class Test {
  public static void main(String[] args) {
    Car car = new Car();
    car.startCar();
  }
}