file.encoding different on same machine

[Merav]

I'm running a java application from Eclipse.
Looking at the system properties I get the following values:
file.encoding = Cp1255
user.language = iw
user.country = IL

Than I'm building a jar for the application and running the jar.
Looking at the system properties I get the following values:
file.encoding = Cp1252
user.language = en
user.country = US

Both are running from the same machine.

All other system properties are the same.

Any ideas ??????