public ConcurrentSkipListMap(SortedMap<K,? extends V> m){
  this.comparator=m.comparator();
  initialize();
  buildFromSorted(m);
}

public ConcurrentSkipListMap ( SortedMap < K , ? extends V > m ) { this . comparator = m . comparator ( ) ; initialize ( ) ; buildFromSorted ( m ) ; }
constructs a new map containing the same mappings and using the same ordering as the specified sorted map .
