How to set rich text format in cells in J#.NET

package Tutorial19;

/* ---------------------------------------------------------------
 * Tutorial 19
 * 
 * This tutorial shows how to create an Excel file in J# having
 * multiple sheets. The first sheet is filled with data and the
 * first cell of the second row contains data in rich text format.
 * --------------------------------------------------------------- */

import System.*;
import EasyXLS.*;
import EasyXLS.Constants.*;

public class Tutorial19
{

    public Tutorial19()
    {
    }

    /** @attribute System.STAThread() */
    public static void main(String[] args)
    {
        Console.WriteLine("Tutorial 19\n----------\n");

        // Create an instance of the class that exports Excel files having two sheets
        ExcelDocument workbook = new ExcelDocument(2);
            
        // Set the sheet names
        workbook.easy_getSheetAt(0).setSheetName("First tab");
        workbook.easy_getSheetAt(1).setSheetName("Second tab");

        // Get the table of data for the first worksheet
        ExcelTable xlsFirstTable = ((ExcelWorksheet)workbook.easy_getSheetAt(0)).easy_getExcelTable();

        // Create the string used to set the RTF in cell
        String sFormattedValue = "This is <b>bold</b>.";
        sFormattedValue += "\nThis is <i>italic</i>.";
        sFormattedValue += "\nThis is <u>underline</u>.";
        sFormattedValue += "\nThis is <underline double>double underline</underline double>.";
        sFormattedValue += "\nThis is <font color=red>red</font>.";
        sFormattedValue += "\nThis is <font color=rgb(255,0,0)>red</font> too.";
        sFormattedValue += "\nThis is <font face=\"Arial Black\">Arial Black</font>.";
        sFormattedValue += "\nThis is <font size=15pt>size 15</font>.";
        sFormattedValue += "\nThis is <s>strikethrough</s>.";
        sFormattedValue += "\nThis is <sup>superscript</sup>.";
        sFormattedValue += "\nThis is <sub>subscript</sub>.";
        sFormattedValue += "\n<b>This</b> <i>is</i> <font color=red face=\"Arial Black\" size=15pt>" + 
                                "<underline double>formatted</underline double></font> <s>text</s>.";

        // Set the rich text value in cell 
        xlsFirstTable.easy_getCell(1, 0).setHTMLValue(sFormattedValue); 
        xlsFirstTable.easy_getCell(1, 0).setDataType(DataType.STRING);
        xlsFirstTable.easy_getCell(1, 0).setWrap(true); 
        xlsFirstTable.easy_getRowAt(1).setHeight(250);
        xlsFirstTable.easy_getColumnAt(0).setWidth(250);

        // Export Excel file
        Console.WriteLine("Writing file C:\\Samples\\Tutorial19 - RTF for Excel cells.xlsx.");
        workbook.easy_WriteXLSXFile("C:\\Samples\\Tutorial19 - RTF for Excel cells.xlsx");

        // Confirm export of Excel file
        String sError = workbook.easy_getError();
        if (sError.Equals(""))
            Console.Write("\nFile successfully created. Press Enter to Exit...");
        else
            Console.Write("\nError encountered: " + sError + "\nPress Enter to Exit...");

        // Dispose memory
        workbook.Dispose();

        Console.ReadLine();
    }
}