Example Depot

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);
}

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