import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.TimeZone;
import java.util.concurrent.TimeUnit;

public class TestZonedDateTime {

	public static void main(String[] args) {
		
		ZonedDateTime zdt = ZonedDateTime.now(ZoneId.of("GMT0")); 
		System.out.println(zdt);
		ZonedDateTime.parse(zdt.toString()); 

	}
	
	private static String displayTimeZone(TimeZone tz) {

		long hours = TimeUnit.MILLISECONDS.toHours(tz.getRawOffset());
		long minutes = TimeUnit.MILLISECONDS.toMinutes(tz.getRawOffset()) 
                                  - TimeUnit.HOURS.toMinutes(hours);
		// avoid -4:-30 issue
		minutes = Math.abs(minutes);

		String result = "";
		if (hours > 0) {
			result = String.format("(GMT+%d:%02d) %s", hours, minutes, tz.getID());
		} else {
			result = String.format("(GMT%d:%02d) %s", hours, minutes, tz.getID());
		}

		return result;

	}

}