public String writeLongToString(){
  StringBuilder builder=new StringBuilder();
  for (int i=0; i < (bitSet.getBits().length); ++i) {
    builder.append(Long.toString(bitSet.getBits()[i]) + "|");
  }
  return builder.toString();
}

public String writeLongToString ( ) { StringBuilder builder = new StringBuilder ( ) ; for ( int i = 0 ; i < ( bitSet . getBits ( ) . length ) ; ++ i ) { builder . append ( Long . toString ( bitSet . getBits ( ) [ i ] ) + "|" ) ; } return builder . toString ( ) ; }
writes vector to a string of the form 010 etc . ( no delimiters ) . no terminating newline or delimiter .
