Java 8 - DateTimeFormatter and ISO_INSTANT issues with ZonedDateTime

Question

So I would expect this code to work under the new Java 8 date/time package since all it does is to convert a given ZonedDateTime to string and back using the same built-in D

Answer 1

If you're using org.threeten.bp from Java 1.8, here's a Cheat Sheet on dealing with String to Date and vice versa.

Date to String

val date = Date()
val calendar = Calendar.getInstance().apply { time = date }
val zonedDateTime = DateTimeUtils.toZonedDateTime(calendar)
val formattedDate = DateTimeFormatter.ISO_INSTANT.format(zonedDateTime)

String to Date

val dateString = "2020-03-04T09:04:43.835Z"
val dateInstant = Instant.from(DateTimeFormatter.ISO_INSTANT.parse(dateString))
DateTimeUtils.toDate(dateInstant)