the system property 'user.name' should return the current user name.
the string returned does not include the domain name.

If the jvm is launched under the 'FOO\bar' account , System.getProperty("user.name")
will only return 'bar'

On windows, a user name is [domain\]<user name>

It is then impossible to make the difference between a local and a doamin user account
And so to get the current user account/name

This call should return a full qualified (and so usable) name accross all platforms
On windows a full qualified user name must contains the domain name (if domain account)