问题
In a previous question, I learned about the preferences API. Unfortunately, it only appears to be user-specific preferences. I also have preferences that need to be able to be set across users. What is the platform-independent way to do that in Java?
EDIT:
Good info below, however since implementing I ran into a snag... Tested first on my dev box (Win 7, UAC off) and it works fine. Tried it on the first of my test VMs and it fails... On Win 7 with UAC on, writes fail (I can do a write followed by a read and not get the value I just put in there).
回答1:
The systemNodeForPackage() and systemRoot methods of the Preferences class give you just what you want.
回答2:
Preferences has both user and system prefs, read the docs carefully.
Preferences.systemRoot();
Preferences.userRoot();
来源：https://stackoverflow.com/questions/4625992/is-there-a-system-wide-version-of-the-preferences-api