How do I obtain the number of days within a given month using Joda-Time?

Question

30 days hath September,
   April, June and November,
 All the rest have 31,
   Excepting February alone
(And that has 28 days clear,
   With 29 in each leap year).
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Answer 1

Here is another simple function:

int daysOfMonth(DateTime dt) {
    int month = dt.getMonthOfYear();
    int month2 = month;
    int days = dt.getDay();
    DateTime dt2 = dt;
    while (month == month2 ) {
       days++;
       dt2.addDays(1);
       month2 = dt2.getMonthOfYear();
    }
    return (days - 1);
}