FULL PRODUCT VERSION :
Java SE7u3
java version "1.7.0_03"
Java(TM) SE Runtime Environment (build 1.7.0_03-b05)
Java HotSpot(TM) 64-Bit Server VM (build 22.1-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

EXTRA RELEVANT SYSTEM CONFIGURATION :
Locale Turkish

A DESCRIPTION OF THE PROBLEM :
When i change system locale to en_US Locale.getDefault() return tr_TR. At java document Locale class The Java Virtual Machine sets the default locale during startup based on the host environment. Java6 return correct locale. There is snapshot of System.getProperties() output for java6 and locale Turkish:

user.country=TR, user.language=tr, user.variant=,

output for java6 and locale Turkish:

user.country=US, user.language=en, user.variant=,

output for java7 and locale Turkish:

user.country=TR, user.script=, user.variant=, user.language=tr

output for java7 and locale English:

user.country.format=US, user.country=TR, user.script=, user.variant=, user.language=tr, user.language.format=en

So user.country=TR, user.language=tr must change to ser.country=US, user.script=, user.variant=, user.language=us but it's fails.






REGRESSION. Last worked in version 7


REPRODUCIBILITY :
This bug can be reproduced always.