public static void main(String[] args) throws Exception {
   Car car = new Car();
   ExecutorService exec = Executors.newCachedThreadPool();
   exec.execute(new WaxOff(car));
   exec.execute(new WaxOn(car));
   TimeUnit.SECONDS.sleep(5); // Run for a while...
   exec.shutdownNow(); // Interrupt all tasks
 }
 public static void main(String[] args) throws Exception {
   ToastQueue dryQueue = new ToastQueue(),
       butteredQueue = new ToastQueue(),
       finishedQueue = new ToastQueue();
   ExecutorService exec = Executors.newCachedThreadPool();
   exec.execute(new Toaster(dryQueue));
   exec.execute(new Butterer(dryQueue, butteredQueue));
   exec.execute(new Jammer(butteredQueue, finishedQueue));
   exec.execute(new Eater(finishedQueue));
   TimeUnit.SECONDS.sleep(5);
   exec.shutdownNow();
 }