how to get year and month from a whole date?

Question

I've got:

String str = "2016-01-05" ;
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
LocalDate date = LocalDate.parse(str, formatter);

Now, the variable "date" contains the date "2016-01-05". How do I extract "2016-01" from that date and put it again into the variable "date" ?

yeah.. that was the question... how do I ignore it? The exercise is: get a whole date yyyy-MM-dd. Put it into a variable. Then, get only yyyy-MM from that, and then put this new date into the same variable (overwrite) — Marco, Jul 01 '16 at 13:51

score 4 · Accepted Answer · answered Jul 01 '16 at 13:51

4

If you are only interested in the year and the month, the best class would be YearMonth. A LocalDate requires a day.

You can create an instance with:

YearMonth ym = YearMonth.from(date);

answered Jul 01 '16 at 13:51

assylias

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ym will be of type YearMonth, not LocalDate, no? can I do date = ym ? – Marco Jul 01 '16 at 13:54
1

@Marco yes it will and no you can't. A LocalDate has a day, you can't remove it, that's the way the class was designed. You should maybe give a bit more context if a YearMonth is not useful for your problem. – assylias Jul 01 '16 at 13:55

how to get year and month from a whole date?

1 Answers1