concurrency and scheduled executors

        ScheduledExecutorService executor = Executors.newScheduledThreadPool(10);
        Runnable runnable = new Runnable() {

            @Override
            public void run() {
                System.out.println(Thread.currentThread().getName() + " - execution time: " + System.currentTimeMillis());
                try {
                    Thread.sleep(100);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        };
        executor.scheduleAtFixedRate(runnable, 100, 10, TimeUnit.MILLISECONDS);