Java Clock class is part of Date Time API, java.time.Clock, of Java. The Java Date Time API was added from Java version 8.
The millis() method of Clock class returns the current instant of the clock in milliseconds. A millisecond instant is measured from 1970-01-01T00:00Z (UTC) to the current time. This method does the same work as System.currentTimeMillis() method. If the creation of an object is unacceptable, then this method is used to allow the use of java.time.Clock in high-performance use cases.
public long millis()
Return Value: This method returns the current instant of the clock in milliseconds.
Exception: This method throws DateTimeException if the instant cannot be obtained from Clock.
Code: Clock clock = Clock.systemDefaultZone(); long miliSeconds=clock.millis(); System.out.println(miliSeconds); Output:: 1534749202051 Explanation:: when millis() is called, then it returns a current instant of Class Object in milliseconds.
Below programs illustrates millis() method of java.time.Clock class:
Program 1: Using millis() with Clock object created with systemDefaultZone
Instant for class name SystemClock[Etc/UTC] in miliseconds is 1534839526984
Program 2: Using millis with Clock object created with Zone “Europe/Paris”
Instant for clock class in miliseconds is 1534839529510
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