public static void main(String[] args) {
        String dateStart = "14:24:26.418";
        String dateStop = "14:23:50.438";
        //HH converts hour in 24 hours format (0-23), day calculation
        SimpleDateFormat format = new SimpleDateFormat("HH:mm:ss.SSS");
        Date d1 = null;
        Date d2 = null;
        try {
            d1 = format.parse(dateStart);
            d2 = format.parse(dateStop);

            //in milliseconds
            long diff = abs(d2.getTime() - d1.getTime());

            long diffMSeconds = diff;
            long diffSeconds = diff / 1000 % 60;
            long diffMinutes = diff / (60 * 1000) % 60;
            long diffHours = diff / (60 * 60 * 1000) % 24;
            long diffDays = diff / (24 * 60 * 60 * 1000);

            System.out.print(diffDays + " days, ");
            System.out.print(diffHours + " hours, ");
            System.out.print(diffMinutes + " minutes, ");
            System.out.print(diffSeconds + " seconds.");
            System.out.print(diffMSeconds + " Mseconds.");

        } catch (Exception e) {
            e.printStackTrace();
        }
    }