Sample Julian Dates:
2009218
2009225
2009243
How do I convert them into a regular date?
I tried converting them using online converter and I got-
12-13-7359 for 2009225!! Makes no sense!
+2
A:
Use the Joda-Time library and do something like this:
String dateStr = "2009218";
MutableDateTime mdt = new MutableDateTime();
mdt.setYear(Integer.parseInt(dateStr.subString(0,3)));
mdt.setDayOfYear(Integer.parseInt(dateStr.subString(4)));
Date parsedDate = mdt.toDate();
Using the Java API:
String dateStr = "2009218";
Calendar cal = new GregorianCalendar();
cal.set(Calendar.YEAR,Integer.parseInt(dateStr.subString(0,3)));
cal.set(Calendar.DAY_OF_YEAR,Integer.parseInt(dateStr.subString(4)));
Date parsedDate = cal.getTime();
---- EDIT ---- Thanks for Alex for providing the best answer:
Date myDate = new SimpleDateFormat("yyyyD").parse("2009218")
Mike Sickler
2010-06-14 11:40:49
How about the month?
Milli Szabo
2010-06-14 11:59:31
MutableDateTime will figure out the month, since it knows the year and day of year.
Mike Sickler
2010-06-14 12:05:02
Is there no way I can use the Java API to do that?
Milli Szabo
2010-06-14 12:06:29
Sure- I've updated my answer.
Mike Sickler
2010-06-14 12:13:18
Thanks a zillion!
Milli Szabo
2010-06-14 12:16:31
An upvote and/or marking my answer as correct would be appreciated :)
Mike Sickler
2010-06-14 12:18:02
Sorry - my bad. :)) Note: You might want to edit a little further since set doesn't have (int, long) methods. Might want to change them to integer.
Milli Szabo
2010-06-14 12:24:02
Use the built in date parsers!
Alex Feinman
2010-06-14 12:27:54
Elaboration on that would be really appreciated. Thanks.
Milli Szabo
2010-06-14 12:29:49
Alex is right. That's the best answer, you could do `new SimpleDateFormat("yyyyD").parse("2009218")` to get your Date object
Mike Sickler
2010-06-14 12:39:08