import java.util.prefs.Preferences; public class Main { public static void main(String[] argv) throws Exception { // Get the system root Preferences prefs = Preferences.systemRoot(); // Get the user root prefs = Preferences.userRoot(); // The name of a root is "" String name = prefs.name(); // The parent of a root is null Preferences parent = prefs.parent(); // The absolute path of a root is "/" String path = prefs.absolutePath(); } }