Apache POI generare commenti su cella

Per creare un commento su una cella con Apache POI.

public static Comment addComment(HSSFCell cell,String testo){
  
    Drawing drawing = cell.getSheet().createDrawingPatriarch();
      CreationHelper factory = cell.getSheet().getWorkbook().getCreationHelper();
      ClientAnchor anchor = factory.createClientAnchor();
      anchor.setCol1(cell.getColumnIndex());
      anchor.setCol2(cell.getColumnIndex() + 3);
      anchor.setRow1(cell.getRowIndex());
      anchor.setRow2(cell.getRowIndex() + 2);
      Comment comment = drawing.createCellComment(anchor);
      RichTextString str = factory.createRichTextString(testo);
      comment.setString(str);
      return comment;
  
 }

Occorre importare i seguenti package:

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.ClientAnchor;
import org.apache.poi.ss.usermodel.Comment;
import org.apache.poi.ss.usermodel.CreationHelper;
import org.apache.poi.ss.usermodel.Drawing;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.RichTextString;