Time not updating
Unrelated to that bug, but a bug still, you should not create swing components outside the event dispatch thread.
Empty Border; public class Swing Worker Progress would be the state where you want the progress bar to stop.
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Time zone data changes often in response to governments around the world changing their local rules and the areas where they apply.
ICU derives its tz data from the IANA Time Zone Database.
For the time zone resources only, ICU will check this directory first when loading data.
The SHORT form is typically an abbreviation, e.g., "PST", "PDT".