How to get the last day of a month in a YearMonth object?

Question

I'm using the YearMonth object of joda.time, and want to get the last day of the month date in this object.

yearMonth.monthOfYear().getMaximumValue(); //return 12 as the maximum month value is =12

But what I want is the maximum day in that specific month? Eg 30 or 31 mostly. How can I get it?

Duplicate http://stackoverflow.com/questions/13624442/getting-last-day-of-the-month-in-given-string-date — Jayram, Oct 01 '14 at 07:19
possible duplicate of [How to get the last date of a particular month with JodaTime?](http://stackoverflow.com/questions/9711454/how-to-get-the-last-date-of-a-particular-month-with-jodatime) — Jens, Oct 01 '14 at 07:19
@Jayram He is asking using jodatime not Calendar class. So its not duplicate — Shoaib Chikate, Oct 01 '14 at 07:20
@Jens I have a `YearMonth` object that does not have a `.dayOfMonth()` method. NO dublicate! — membersound, Oct 01 '14 at 07:25

score 9 · Accepted Answer · answered Oct 01 '14 at 09:38

DateTime has this readymade feature.

DateTime dt = new DateTime();
System.out.println(dt.dayOfMonth().getMaximumValue());

But if you want it for YearMonth, then convert YearMonth to DateTime and do as above:

YearMonth ym = new YearMonth();
dt = ym.toDateTime(null);
System.out.println(dt.dayOfMonth().getMaximumValue());

score 0 · Answer 2 · answered Oct 01 '14 at 07:29

0

If you want to get maximum day of the month in Joda you should use LocalDate

Eg:

LocalDate endOfMonth = LocalDate.fromDateFields(new 
                                         Date()).dayOfMonth().withMaximumValue();
System.out.println(endOfMonth);

Out put:

2014-10-31

From documentation

This operation is useful for obtaining a LocalDate on the last day of the month, 
as month lengths vary.    
LocalDate lastDayOfMonth = dt.dayOfMonth().withMaximumValue();

answered Oct 01 '14 at 07:29

Ruchira Gayan Ranaweera

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As written above, I do *only* have the `YearMonth` object. I do *not* have a `LocalDate`... – membersound Oct 01 '14 at 07:33

score 0 · Answer 3 · answered Oct 01 '14 at 07:52

0

Create a DateTime Object from your yearMonth:

DateTime datetime = new DateTime(yearMonth.get(DateTimeFieldType.year()), yearMonth.get(DateTimeFieldType.monthOfYear()),1,0,0);
System.out.println(datetime.dayOfMonth().getMaximumValue());

answered Oct 01 '14 at 07:52

Jens

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How to get the last day of a month in a YearMonth object?

3 Answers3