Finding days difference in java

Question

After consulting a few forums, I ended up using the code below to find the days difference. But, I see a problem with the logic (may be it\'s my over sight?). I see that for

Answer 1

Using float, I see the problem. Using timestamp doesn't seem like a good approach to finding the days difference between 2 dates.

11 to 11 = 0.0
11 to 12 = 1.0
11 to 13 = 2.0
11 to 14 = 3.0
11 to 15 = 3.9583333
11 to 16 = 4.9583335
11 to 17 = 5.9583335
11 to 18 = 6.9583335
11 to 19 = 7.9583335

Going forward, I find the most conclusive way to determine the date difference as

Calendar cre_calendar = new GregorianCalendar((2013), (1), 11);
        Calendar exp_calendar = new GregorianCalendar((2013), (1), 19);
        Calendar maxDays = new GregorianCalendar(((2013)), (12), 31);

        if (exp_calendar.get(Calendar.DAY_OF_YEAR) < cre_calendar
                .get(Calendar.DAY_OF_YEAR)) {
            System.out
                    .println((exp_calendar.get(Calendar.DAY_OF_YEAR) + maxDays
                            .get(Calendar.DAY_OF_YEAR))
                            - cre_calendar.get(Calendar.DAY_OF_YEAR));
        } else {
            System.out.println((exp_calendar.get(Calendar.DAY_OF_YEAR))
                    - cre_calendar.get(Calendar.DAY_OF_YEAR));
        }