poi/src/examples/src/org/apache/poi/xssf/usermodel/examples/CellComments.java

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   (the "License"); you may not use this file except in compliance with
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       http://www.apache.org/licenses/LICENSE-2.0

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package org.apache.poi.xssf.usermodel.examples;

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.IOException;
import java.io.FileOutputStream;

/**
 * Demonstrates how to work with excel cell comments.
 *
 * <p>
 * Excel comment is a kind of a text shape,
 * so inserting a comment is very similar to placing a text box in a worksheet
 * </p>
 *
 * @author Yegor Kozlov
 */
public class CellComments {
    public static void main(String[] args) throws IOException {
        Workbook wb = new XSSFWorkbook();

        CreationHelper factory = wb.getCreationHelper();

        Sheet sheet = wb.createSheet();

        Cell cell1 = sheet.createRow(3).createCell(5);
        cell1.setCellValue("F4");

        Drawing drawing = sheet.createDrawingPatriarch();

        ClientAnchor anchor = factory.createClientAnchor();

        Comment comment1 = drawing.createCellComment(anchor);
        RichTextString str1 = factory.createRichTextString("Hello, World!");
        comment1.setString(str1);
        comment1.setAuthor("Apache POI");
        cell1.setCellComment(comment1);

        Cell cell2 = sheet.createRow(2).createCell(2);
        cell2.setCellValue("C3");

        Comment comment2 = drawing.createCellComment(anchor);
        RichTextString str2 = factory.createRichTextString("XSSF can set cell comments");
        //apply custom font to the text in the comment
        Font font = wb.createFont();
        font.setFontName("Arial");
        font.setFontHeightInPoints((short)14);
        font.setBoldweight(Font.BOLDWEIGHT_BOLD);
        font.setColor(IndexedColors.RED.getIndex());
        str2.applyFont(font);

        comment2.setString(str2);
        comment2.setAuthor("Apache POI");
        comment2.setColumn(2);
        comment2.setRow(2);

        String fname = "comments.xlsx";
        FileOutputStream out = new FileOutputStream(fname);
        wb.write(out);
        out.close();

    }
}