Timezone IDs from java.time.ZoneId

Programming
,
1

I’m trying to get the short name for the system default timezone using java.time.ZoneId. However, the API is returning an unexpected value. For example, when the server is in Asia/Kolkata, I am getting IT instead of IST. The same thing is happening when PT is returned instead of PST. Here is my code snippet:

//String timeZone = ZoneId.of("Asia/Kolkata").getDisplayName(TextStyle.SHORT, Locale.ENGLISH);
String timeZone = ZoneId.systemDefault().getDisplayName(TextStyle.SHORT, Locale.ENGLISH);

Returns:

IT

I need to get the well known short name for the timezone. Can anyone help me with this?

2

The issue you are facing is due to the fact that ZoneId.systemDefault() returns the system default timezone, which can sometimes be in the format of a three-letter abbreviation that is not well-known or standardized.

To get the well-known short name for the timezone, you can use the java.util.TimeZone class instead. Here is an updated code snippet that should give you the expected results:

String timeZone = TimeZone.getDefault().getDisplayName(false, TimeZone.SHORT, Locale.ENGLISH);

This will give you the short name for the system default timezone in a well-known and standardized format, such as IST for Asia/Kolkata or PST for America/Los_Angeles.