BreakIterator API Java

Question

The documentation for BreakIterator.getWordInstance() has options to use it with the Locale parameter, presumably because different locales' end results may vary for methods like ( WordInstance , LineInstance , SentenceInstance , CharacterInstance )

But, when I do not use this parameter, I still get the same results as I get when calling it with any Locale in getAvailableLocales() .

Is there some pattern, String, or Locale which actually causes these methods to give different results?

Answer 1

I believe all "western" languages have the same rules.

Cursory scan shows that locale th (Thai) has it's own rules, given in file /sun/text/resources/th/WordBreakIteratorData_th inside .../jre/lib/ext/localedata.jar .

It's a binary file, so I don't know what it says, and even if I could understand the file, not knowing Thai, I still wouldn't understand it.