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I have been tested fair and non fair disciplines via RentrantLock . I wrote a small program that simulates dinning philosophers. Each philospher has left and right fork which are ReentrantLock s. I have simulated 1000 times act of thinking and eating: for (int i = 0; i < ACT_TIMES; i++) { act(); } where act is private void act() { think(); eat(); } Think is not interesting it just sleeps for some amount of time. Here is eat method private void eat() { try { if (left.tryLock(0, TimeUnit.MILLISECONDS)) { if (right.tryLock(0, TimeUnit.MILLISECONDS)) { log("eating"); eatCount++; try { Thread.sleep(EAT_TIME); } catch (InterruptedException e) { } finally { left.unlock(); right.unlock(); } } else { left.unlock(); } } } catch (InterruptedException e) { e.printStackTrace(); } } Main method: Lock[] forks = new Lock[5]; for (int i = 0; i < forks.length; i++) { forks[i] = new ReentrantLock(); } Philosopher p1 = new Philosopher(0, forks[1], forks[0]); Philosopher p2 = new Philosopher(1, forks[2], forks[1]); Philosopher p3 = new Philosopher(2, forks[3], forks[2]); Philosopher p4 = new Philosopher(3, forks[4], forks[3]); Philosopher p5 = new Philosopher(4, forks[0], forks[4]); ExecutorService exec = Executors.newFixedThreadPool(5); exec.submit(p1); exec.submit(p2); exec.submit(p3); exec.submit(p4); exec.submit(

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