StringBuffer rtn = new StringBuffer();
StringBuilder rtn = new StringBuilder();
  public String toString() {    StringBuffer rtn = new StringBuffer();    rtn.append("\tName: " + _name);    rtn.append("\n\tNumber: " + _indexNumber);    rtn.append("\n\tPage number: " + _pageNumber);    rtn.append("\n\tColumns: " + _columns);    rtn.append("\n\tEntries: " + _entries);    rtn.append("\n\n");    return rtn.toString();  }