public static void main(String[] args) {
    Service service = new Service();

    ThreadA a = new ThreadA(service);
    a.setName("A");
    a.start();
    ThreadB b = new ThreadB(service);
    b.setName("B");
    b.start();
    ThreadC c = new ThreadC(service);
    c.setName("C");
    c.start();
  }