An Instant is a moment on the timeline in UTC with a resolution of nanoseconds. ZonedDateTime zdt = ZonedDateTime.of( 2016, 1, 2, 12, 0, 0, 0, zoneId ) // Noon on Jan 2 in Iran. ZoneId zoneId = ZoneId.of( "Asia/Tehran" )
If you know the intended time zone, generally best to use it rather than a mere offset. OffsetDateTime odt = OffsetDateTime.of( 2016, 1, 2, 12, 0, 0, 0, zoneOffset ) // Noon on Jan 2 in offset `+03:30`.Ī time zone is an offset-from-UTC plus a set of rules of adjusting for anomalies such as Daylight Saving Time (DST). ZoneOffset zoneOffset = ZoneOffset.of( 3, 30 ) By the way, always use a leading zero on the hour, +03:30 not +3:30 common by convention, and required by some software and protocols. If you are sure you want to use an offset of +03:30, use the ZoneOffset and OffsetDateTime classes. As noted SQLite (being “lite”) has no support for time zone, so you should adjust your date-time values into UTC for insertion into SQLite.įor this reason and other reasons, programmers should learn to think in UTC while on the job. UTCīest practice is usually to do your business logic, data storage, and data exchange all in UTC. The java.time classes supplant the notoriously troublesome old date-time classes bundled with the earliest versions of Java. The java.time classes are the successor to the highly successful Joda-Time library, both projects led by the same man, Stephen Colbourne.
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Much of their functionality has been back-ported to Java 6 & 7 in the ThreeTen-Backport project, and further adapted to Android in the ThreeTenABP project. The java.time classes are built into Java 8 and later. is correct, and should be accepted.Īs said there, you should do time zone handling in your Java code using the excellent java.time framework.
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