Format LocalDateTime with Timezone in Java8

Question

I have the this simple code   DateTimeFormatter FORMATTER   DateTimeFormatter ofPattern  yyyyMMdd HH mm ss SSSSSS Z    LocalDateTime now   format FORMATTER    Then I will get following exception   java time temporal UnsupportedTemporalTypeException  Unsupported field  OffsetSeconds at java time LocalDate get0 LocalDate java 680  at java time LocalDate getLong LocalDate java 659  at java time LocalDateTime getLong LocalDateTime java 720  at java time format DateTimePrintContext getValue DateTimePrintContext java 298  at java time format DateTimeFormatterBuilder OffsetIdPrinterParser format DateTimeFormatterBuilder java 3315  at java time format DateTimeFormatterBuilder CompositePrinterParser format DateTimeFormatterBuilder java 2182  at java time format DateTimeFormatter formatTo DateTimeFormatter java 1745  at java time format DateTimeFormatter format DateTimeFormatter java 1719  at java time LocalDateTime format LocalDateTime java 1746    How to resolve this issue

User · Answer

LocalDateTime now   format DateTimeFormatter ofPattern  yyyyMMdd HH mm ss SSSSSS Z

User · Answer

The prefix  Local  in JSR-310  aka java time-package in Java-8  does not indicate that there is a timezone information in internal state of that class  here  LocalDateTime   Despite the often misleading name such classes like LocalDateTime or LocalTime have NO timezone information or offset   You tried to format such a temporal type  which does not contain any offset  with offset information  indicated by pattern symbol Z   So the formatter tries to access an unavailable information and has to throw the exception you observed   Solution    Use a type which has such an offset or timezone information  In JSR-310 this is either OffsetDateTime  which contains an offset but not a timezone including DST-rules  or ZonedDateTime  You can watch out all supported fields of such a type by look-up on the method isSupported TemporalField    The field OffsetSeconds is supported in OffsetDateTime and ZonedDateTime  but not in LocalDateTime   DateTimeFormatter formatter   DateTimeFormatter ofPattern  yyyyMMdd HH mm ss SSSSSS Z    String s   ZonedDateTime now   format formatter

User · Answer

LocalDateTime is a date-time without a time-zone  You specified the time zone offset format symbol in the format  however  LocalDateTime doesn t have such information  That s why the error occured   If you want time-zone information  you should use ZonedDateTime   DateTimeFormatter FORMATTER   DateTimeFormatter ofPattern  yyyyMMdd HH mm ss SSSSSS Z    ZonedDateTime now   format FORMATTER     gt   20140829 14 12 22 122000  09

[java] Format LocalDateTime with Timezone in Java8

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