private static String[] makeColumnNames(ColumnType types[]){
  String[] header=new String[types.length];
  for (int i=0; i < types.length; i++) {
    header[i]="C" + i;
  }
  return header;
}

private static String [ ] makeColumnNames ( ColumnType types [ ] ) { String [ ] header = new String [ types . length ] ; for ( int i = 0 ; i < types . length ; i ++ ) { header [ i ] = "C" + i ; } return header ; }
provides placeholder column names for when the file read has no header
