Java Instant Class

11.04.2024 — java, Instant — 1 min read

Instant class is like a single moment in time in the UTC time zone. If time is a line, Instant represents a single point on the line. It's Unix epoch time based.

Examples

Instant twelveHoursFromNow = Instant.now().plus(12, ChronoUnit.HOURS);
Instant thirtyDaysAgo = instantSource.instant().minus(30, ChronoUnit.DAYS);
Instant oneWeekAgo = Instant.now().minus(7, ChronoUnit.DAYS);

We can compare two Instants

Instant instant1 = Instant.now();
Instant instant2 = instant1.plus(1, ChronoUnit.SECONDS);
assertTrue(instant1.isBefore(instant2));
assertFalse(instant1.isAfter(instant2));