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javajodatime

Simplest way to get local milliseconds in a time zone with Joda-Time

Currently, to get milliseconds from start of 1970 in a local time zone, I do

long localMillis = dateTime.withZone(timeZone).toLocalDateTime()
    .toDateTime(DateTimeZone.UTC).getMillis();

This works, but is there a simpler way to do this?

Solution

  • You can make this a little clearer by storing a constant LocalDateTime referring to Jan 1, 1970, and then calculating a Duration between that point in time (for a given time zone) and the instant that you care about, like:

    private static final LocalDateTime JAN_1_1970 = new LocalDateTime(1970, 1, 1, 0, 0);

...

new Duration(JAN_1_1970.toDateTime(someTimeZone), endPointInstantOrDateTime).getMillis();