Clock
Description
Clock class represents the real-world clock.
We can access to the current instant, date, and time in a
time zone from Clock class.
We can create a clock for the system default time zone as follows.
Clock clock = Clock.systemDefaultZone();
To create a clock for a specified time zone.
ZoneId z = ZoneId.of("America/Los_Angeles");
Clock clock2 = Clock.system(z);
Example
To get the current instant, date, and time from a clock, use the now(Clock c)
method of the datetime related classes.
import java.time.Clock;
import java.time.Instant;
import java.time.LocalDate;
import java.time.ZonedDateTime;
/*from ww w. j av a 2 s . c o m*/
public class Main {
public static void main(String[] args) {
Clock clock = Clock.systemDefaultZone();
Instant instant1 = clock.instant();
System.out.println(instant1);
Instant instant2 = Instant.now(clock);
System.out.println(instant2);
LocalDate localDate = LocalDate.now(clock);
System.out.println(localDate);
ZonedDateTime zoneDateTime = ZonedDateTime.now(clock);
System.out.println(zoneDateTime);
}
}
The code above generates the following result.
