public static void main(String[] args) {
        df = new DecimalFormat("#.00");

        // Run a total of 4 timer accuracy tests (for different batch sizes)
        timerAccuracyTest(500);
        timerAccuracyTest(1000);
        timerAccuracyTest(1500);
        timerAccuracyTest(2000);

        // Run a number of different sleep tests. Note the tests are
        // repeated as a means of demonstrating the variability between
        // different calls to sleep for the same amount of time.
        for (int idx = 0; idx < 5; idx++)
            sleepTest(50);
        
        for (int idx = 0; idx < 5; idx++)
            sleepTest(10);

        for (int idx = 0; idx < 5; idx++)
            sleepTest(5);

        for (int idx = 0; idx < 5; idx++)
            sleepTest(1);
    }