public static void main(String[] args) throws ParseException {

        System.out.println(TimeUtil.dayOfYear(1992, 12, 31));

        System.out.println(TimeUtil.dayOfYear(2016, 3, 14));

        JDateTime time = new JDateTime(new Date());

        JDateTime time2 = new JDateTime(new SimpleDateFormat("yyyyMMdd").parse("20160310"));

        System.out.println(time2.daysBetween(time));

}

/**

     * Calculates the number of days between two dates. Returned value is always positive.

     */

public int daysBetween(JulianDateStamp otherDate) {

        int difference = daysSpan(otherDate);

        return difference >= 0 ? difference : -difference;

}

/**

     * Returns span between two days. Returned value may be positive (when this date

     * is after the provided one) or negative (when comparing to future date).

     */

public int daysSpan(JulianDateStamp otherDate) {

        int now = getJulianDayNumber();

        int then = otherDate.getJulianDayNumber();

        return now - then;

}

/**

     * Returns JDN. Note that JDN is not equal to {@link #integer}. It is calculated by

     * rounding to the nearest integer.

     */

public int getJulianDayNumber() {

        if (fraction >= 0.5) {

            return integer + 1;

        }

        return integer;

}