public class Server {  

    public static void main(String args[]) {
	
        Semaphore s = new Semaphore(1);

	// now create the producer and consumer threads
      	Worker w1 = new Worker(s, 0);
      	Worker w2 = new Worker(s, 1);
	
      	w1.start();
      	w2.start();
    }
}