Java Coding Problems

Starting with JDK 8

Starting with JDK 8, a convenient solution to get the current local date-time in the default time zone is to call the ZonedDateTime.now() method:

ZonedDateTime zlt = ZonedDateTime.now();

So, this is the current date in the default time zone. Furthermore, this date should be displayed in all the available time zones that are obtained via the ZoneId class:

Set<String> zoneIds = ZoneId.getAvailableZoneIds();

Finally, the code can loop the zoneIds, and for each zone id, it can call the ZonedDateTime.withZoneSameInstant(ZoneId zone) method. This method returns a copy of this date-time with a different time zone, retaining the instant:

public static List<String> localTimeToAllTimeZones() { List<String> result = new ArrayList<>(); ...