Java in a Nutshell, 5th Edition [Electronic resources] نسخه متنی

The
PreferencesFactory interface defines the factory
methods used by the static methods of the
Preferences class to obtain the root
Preferences nodes for user-specific and
system-wide preferences hierarchies. Application programmers never
need to use this interface.

An implementation of the preferences API for a specific back-end data
store must include an implementation of this interface that works
with that data store. Sun's implementation of Java
includes a default filesystem-based implementation, which you can
override by specifying the name of a
PreferencesFactory implementation as the value of
the
"java.util.prefs.PreferencesFactory"
system property.

public interface

PreferencesFactory {
// Public Instance Methods
Preferences

systemRoot ( );
Preferences

userRoot ( );
}