About Question enthuware.ocpjp.v7.2.1450 :

[accurate_guy]

Q: Identify correct statements about i18n.
A: Using default locale for NumberFormat and DateFormat automatically ensures that the formatted text will be localized to the location setting of the machine on which the code is run.

This is not completely true because the default locale can be changed
* by using VM arguments: -Duser.language=en
* and by setting it in the code: Locale.setDefault(new Locale("en"));

[admin]

Well, by changing the default locale, you are telling the JVM that your default locale is something else. NumberFormat and DateFormat will behave according to the new default locale.

But you are right there is some ambiguity in the statement. This has now been fixed.

thank you for your feedback!