I have a problem with parsing zoned date time:
DateTimeFormatter format = DateTimeFormatter.ofPattern("yyyy-MM-ddzhh:mm");
ZonedDateTime.parse(s, formatter);
and error:
java.time.format.DateTimeParseException: Text ‘2022-05-24UTC12:15’
could not be parsed at index 10
whats wrong with this code ?
thanks
>Solution :
tl;dr – You have the wrong pattern…
The character z
is not able to parse "UTC"
because UTC is a time-zone ID while z
can only parse time-zone-names according to the JavaDocs of java.time.DateTimeFormatter
, here’s the relevant part of the docs:
Symbol Meaning Presentation Examples
------ ------- ------------ -------
(…)
V time-zone ID zone-id America/Los_Angeles; Z; -08:30
z time-zone name zone-name Pacific Standard Time; PST
(…)
That means you have to parse it using the character V
, but you will have to put two of them (VV
) or you will get a nice IllegalArgumentException
with the following message:
java.lang.IllegalArgumentException: Pattern letter count must be 2: V
This all boils down to the following pattern:
DateTimeFormatter format = DateTimeFormatter.ofPattern("uuuu-MM-ddVVHH:mm");
which will be able to parse an input like "2022-05-24UTC12:15"
.
Unfortunately, the docs don’t mention if UTC is actually an id or a name. Consider GMT, which also defines a time zone with an offset of 0 hours. Your current pattern (the one with a single z
) would have parsed the input "2022-05-24GMT12:15"
, because GMT is considered a time-zone name.