Fair vs NonFair

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 ReentrantLocks. 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(