CODEWITHSUNDEEP
javajava-8timezonegoogle-api-java-clientjava-calendar
Manvi
Manvi

Reputation: 1156

Get timezone of area with country code in Java

I have to pass a message (jms) with timezone info like (America/Los_Angeles) but I have only country name and code. If it possible get timezone info with Java code. Somewhere I read this:

System.out.println(TimeZone.getTimeZone("US"));

But its giving output as 

sun.util.calendar.ZoneInfo[id="GMT",offset=0,dstSavings=0,useDaylight=false,transitions=0,lastRule=null]

I am expecting List of "America/Los_Angeles", ...

Upvotes: 5

Views: 29783

Answers (3)

arnt
arnt

Reputation: 9685

The builtin Java classes don't offer this, but ICU's TimeZone class does, and TimeZone.getAvailableIDs("US") provides the correct answer.

Upvotes: 8

Ravindra Ranwala
Ravindra Ranwala

Reputation: 21124

As per the documentation the getTimeZone method returns the specified TimeZone, or the GMT zone if the given ID cannot be understood. There's no TimeZone ID called US hence it gives the GMT zone. If you really want to get all the list of TimeZones available in US, I would suggest you to use the following.

final List<String> timeZonesInUS = Stream.of(TimeZone.getAvailableIDs())
        .filter(zoneId -> zoneId.startsWith("US")).collect(Collectors.toList());

Upvotes: 4

MusicDev
MusicDev

Reputation: 94

If I'm understanding correctly, it looks like you just want a list of timezones from a given country. This site has a list of all the countries that have their own code:

https://garygregory.wordpress.com/2013/06/18/what-are-the-java-timezone-ids/

Looking at the API for TimeZones shows that there's no way to grab a list of timezones directly through TimeZone.getTimeZone(). So instead, you probably want to loop through them and just see which ones start with the country name and add them to a list, like so:

public static List<String> GetZones(String country) {
    List<String> zones = new ArrayList<>();

    for (String i : TimeZone.getAvailableIDs()) {
        if (i.startsWith(country)) {
            zones.add(i);
        }
    }
    return zones;

}

Upvotes: 2

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