Java 8 Date-Time API : Part - 3/6 (TemporalAdjuster, Instant, Duration, Period)

Instant – represents a point in time (timestamp)
Duration – amount of time represented in seconds, minutes and hours. Has nanosecond precision
Period – amount of time represented in days, months and years
TemporalAdjuster - is a strategy for adjusting a Temporal object.
A Temporal defines a representation of a date, time, or a combination of both, depending on the implementation we're going to be using.