import java.util.prefs.Preferences;
public class Main {
public static void main(String[] argv) throws Exception {
// System preference nodes
// Use a Class
Preferences prefs = Preferences.systemNodeForPackage(java.lang.String.class);
// Use an absolute path
prefs = Preferences.systemRoot().node("/java/lang/String");
// Use a relative path
prefs = Preferences.systemRoot().node("/javax/swing");
prefs = prefs.node("text/html");
// User preference nodes
// Use a class
prefs = Preferences.userNodeForPackage(Main.class);
// Use an absolute path
prefs = Preferences.userRoot().node("/com/mycompany");
// Use a relative path
prefs = Preferences.userRoot().node("/javax/swing");
prefs = prefs.node("text/html");
}
}