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<TITLE>Retrieving Information on All Available Time Zones
(Java Developers Almanac Example)
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<h3>
e371.
Retrieving Information on All Available Time Zones</h3>
This example lists all time zones known by the JDK.
<pre>
Date today = new Date();
// Get all time zone ids
String[] zoneIds = TimeZone.getAvailableIDs();
// View every time zone
for (int i=0; i<zoneIds.length; i++) {
// Get time zone by time zone id
TimeZone tz = TimeZone.getTimeZone(zoneIds[i]);
// Get the display name
String shortName = tz.getDisplayName(tz.inDaylightTime(today), TimeZone.SHORT);
String longName = tz.getDisplayName(tz.inDaylightTime(today), TimeZone.LONG);
// Get the number of hours from GMT
int rawOffset = tz.getRawOffset();
int hour = rawOffset / (60*60*1000);
int min = Math.abs(rawOffset / (60*1000)) % 60;
// Does the time zone have a daylight savings time period?
boolean hasDST = tz.useDaylightTime();
// Is the time zone currently in a daylight savings time?
boolean inDST = tz.inDaylightTime(today);
}
</pre>
Here's a few time zone entries:
<pre>
Id, Short Name, Long Name, Hour:Time from GMT
ACT, CST, Central Standard Time (Northern Territory) 9:30
AET, EST, Eastern Summer Time (New South Wales) 10:0
AGT, ART, Argentine Time -3:0
ART, EET, Eastern European Time 2:0
AST, AKST, Alaska Standard Time -9:0
Africa/Abidjan, GMT, Greenwich Mean Time 0:0
Africa/Accra, GMT, Greenwich Mean Time 0:0
Africa/Addis_Ababa, EAT, Eastern African Time 3:0
Africa/Algiers, CET, Central European Time 1:0
Africa/Asmera, EAT, Eastern African Time 3:0
Africa/Bamako, GMT, Greenwich Mean Time 0:0
Africa/Bangui, WAT, Western African Time 1:0
</pre>
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Related Examples
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e369. <a class="eglink" href="GetCurTime.html?l=rel">
Getting the Current Time
</a>
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e370. <a class="eglink" href="GetTimeOtherZone.html?l=rel">
Getting the Current Time in Another Time Zone
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e372. <a class="eglink" href="GetTimeOtherZone2.html?l=rel">
Converting Times Between Time Zones
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See also:
<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Arrays">
Arrays
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<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Bits">
Bits
</a>
<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Collections">
Collections
</a>
<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Dates">
Dates
</a>
<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Hash%20Tables">
Hash Tables
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<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Lists">
Lists
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<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Property%20Files">
Property Files
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<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Sets">
Sets
</a>
<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Sorted%20Collections">
Sorted Collections
</a>
<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Timers">
Timers
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