public static Preferences userRoot(){
  SecurityManager security=System.getSecurityManager();
  if (security != null)   security.checkPermission(prefsPerm);
  return factory.userRoot();
}

public static Preferences userRoot ( ) { SecurityManager security = System . getSecurityManager ( ) ; if ( security != null ) security . checkPermission ( prefsPerm ) ; return factory . userRoot ( ) ; }
returns the root preference node for the calling user .
