java.util.concurrent · java.base · since Java 1.5

TimeUnit

declaration

public enum TimeUnit

Time granularity enum (NANOSECONDS…DAYS) used across concurrency APIs for timeouts, plus conversion and sleep helpers.

Key methods

`long convert(Duration duration)`	Duration → this unit (Java 11).
`long toMillis(long duration)`	Conversions between units.
`void sleep(long timeout)`	Unit-safe Thread.sleep.