Java tutorial
import java.time.Instant; import java.time.temporal.ChronoUnit; public class Main { public static void main(String[] args) { // Instant is useful for generating a time stamp to represent machine time. Instant timestamp = Instant.now(); // How many seconds have occurred since the beginning of the Java epoch. long secondsFromEpoch = Instant.ofEpochSecond(0L).until(Instant.now(), ChronoUnit.SECONDS); System.out.println(secondsFromEpoch); } }