import java.util.prefs.Preferences;
public class PreferenceExample {
public static void main(String args[]) throws Exception {
Preferences prefsRoot = Preferences.userRoot();
Preferences myPrefs = prefsRoot.node("PreferenceExample");
myPrefs.put("A", "a");
myPrefs.put("B", "b");
myPrefs.put("C", "c");
System.out.println("Node's name: " + myPrefs.name());
System.out.println("Node's parent: " + myPrefs.parent());
System.out.println("NODE: " + myPrefs);
}
}