About

Java.time package supplants the old java.util.Date/Calendar classes.

• java.time since JDK1.8. It contains the main API based on the ISO-8601 standard. See Date and Time Api Specification in Java 8

Let op: javase/9/docs/api/java/util/concurrent/TimeUnit.html. A TimeUnit does not maintain time information (just for thread concurrency)

Object

• Java - LocalDate
• javase/9/docs/api/java/time/LocalDateTime.html - A date-time without a time-zone in the ISO-8601 calendar system, such as 2007-12-03T10:15:30.

Example

• Build an instant

Instant.parse("2016-05-02T14:53:27Z")

• Diff between two date time in millisecond

ChronoUnit.MILLIS.between(startTime, endTime);