Java Data Type How to - Get time difference in two time zones by seconds

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Question

We would like to know how to get time difference in two time zones by seconds.

Answer

// w  w w.  java 2 s .  c o m
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;

public class Main {
  public static void main(String[] args) {
    ZoneId berlin = ZoneId.of("Europe/Berlin");
    ZoneId losAngeles = ZoneId.of("America/Los_Angeles");
    // 2014-02-20 12:00
    LocalDateTime dateTime = LocalDateTime.of(2014, 02, 20, 12, 0);

    // 2014-02-20 12:00, Europe/Berlin (+01:00)
    ZonedDateTime berlinDateTime = ZonedDateTime.of(dateTime, berlin);

    // 2014-02-20 03:00, America/Los_Angeles (-08:00)
    ZonedDateTime losAngelesDateTime = berlinDateTime.withZoneSameInstant(losAngeles);
    
    int offsetInSeconds = losAngelesDateTime.getOffset().getTotalSeconds(); // -28800
    
    System.out.println(offsetInSeconds);
  }
}

The code above generates the following result.

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