Days between Two Dates (with Arrays)

/* Write a program to calculate the difference between two dates in number of days.
 * The dates are entered at two consecutive lines in format day-month-year.
 * Days are in range [1…31]. Months are in range [1…12].
 * Years are in range [1900…2100]. */

import java.util.Arrays;
import java.util.Scanner;

public class _07_DaysBetweenTwoDates_WithArrays {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner scan = new Scanner(System.in);
        System.out.println("Enter 2 dates exactly in this format [day-month-year]: ");
        String firstInputStr = scan.next();
        String secondInputStr = scan.next();

        int[] startDate = createComponentsOfDateFromInputStringInArray(firstInputStr);
        int[] endDate = createComponentsOfDateFromInputStringInArray(secondInputStr);

        long resultDays = 0;
        boolean twoDatesAreEquals = Arrays.equals(startDate, endDate);
        if (!twoDatesAreEquals) {
            boolean resultIsNegative = false;
            if (startDate[2] > endDate[2] || (startDate[2] == endDate[2]
                           && startDate[1] > endDate[1]) || (startDate[2] == endDate[2]
               && startDate[1] == endDate[1] && startDate[0] > endDate[0])) {
                resultIsNegative = true;
                int[] tempArr = Arrays.copyOf(startDate, startDate.length);
                startDate = Arrays.copyOf(endDate, endDate.length);
                endDate = Arrays.copyOf(tempArr, tempArr.length);
            }

            int yearsBetweenDates = getYearsBetweenTwoDates(startDate, endDate);
            double totalDaysBetween = 365.2425 * yearsBetweenDates;

            totalDaysBetween += getDaysFromDayAndMonthBetweenTwoDates(
                    startDate, endDate);
            if (resultIsNegative) {
                totalDaysBetween *= -1;
            }

            resultDays += Math.round(totalDaysBetween);
        }

        System.out.printf("The number of Days between these 2 dates is: %d !\n",
                resultDays);

    }

    private static double getDaysFromDayAndMonthBetweenTwoDates(int[] start, int[] end) {
        // TODO Auto-generated method stub
        double daysBetween = 0;
        int months = 0;
        if (start[1] > end[1]) {
            months = (12 + end[1]) - start[1];
            if (start[0] > end[0]) {
                months -= 1;
                daysBetween += (30 + end[0]) - start[0];
            } else {
                daysBetween += end[0] - start[0];
            }
        } else {
            months = end[1] - start[1];
            if (months > 0 && start[0] > end[0]) {
                months -= 1;
                daysBetween += (30 + end[0]) - start[0];
            } else {
                daysBetween += end[0] - start[0];
            }
        }

        daysBetween += 30.4 * months;
        return daysBetween;
    }

    private static int getYearsBetweenTwoDates(int[] start, int[] end) {
        // TODO Auto-generated method stub
        int years = end[2] - start[2];
        if (years > 0 && (end[1] < start[1] || (end[1] == start[1] && end[0] < start[0]))) {
            years -= 1;
        }
        return years;
    }

    private static int[] createComponentsOfDateFromInputStringInArray(
            String inputStr) {
        // TODO Auto-generated method stub
        String[] dateStr = inputStr.split("[-]+");
        int[] dateComps = new int[dateStr.length];
        for (int i = 0; i < dateComps.length; i++) {
            dateComps[i] = Integer.parseInt(dateStr[i]);
        }

        return dateComps;
    }

}