protected SelectorProvider(){
  SecurityManager sm=System.getSecurityManager();
  if (sm != null)   sm.checkPermission(new RuntimePermission("selectorProvider"));
}

protected SelectorProvider ( ) { SecurityManager sm = System . getSecurityManager ( ) ; if ( sm != null ) sm . checkPermission ( new RuntimePermission ( "selectorProvider" ) ) ; }
initializes a new instance of this class .
