How to create chart in a worksheet in J#.NET

package Tutorial24;

/* ----------------------------------------------------------
 * Tutorial 24
 * 
 * This tutorial shows how to create an Excel file in J# and
 * to create a chart in a worksheet.
 * ---------------------------------------------------------- */

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

public class Tutorial24
{
    public Tutorial24()
    {
    }

    /** @attribute System.STAThread() */
    public static void main(String[] args)
    {
        Console.WriteLine("Tutorial 24\n----------\n");

        // Create an instance of the class that exports Excel files
        ExcelDocument workbook = new ExcelDocument();
            
        // Create an worksheet
        workbook.easy_addWorksheet("SourceData");

        // Get the table of data for the worksheet
        ExcelTable xlsTable1 = ((ExcelWorksheet)workbook.easy_getSheet("SourceData")).easy_getExcelTable();

        // Add data in cells for report header
        xlsTable1.easy_getCell(0, 0).setValue("Show Date");
        xlsTable1.easy_getCell(0, 1).setValue("Available Places");
        xlsTable1.easy_getCell(0, 2).setValue("Available Tickets");
        xlsTable1.easy_getCell(0, 3).setValue("Sold Tickets");

        // Add data in cells for chart report values
        xlsTable1.easy_getCell(1, 0).setValue("03/13/2005 00:00:00");
        xlsTable1.easy_getCell(1, 0).setFormat(EasyXLS.Constants.Format.FORMAT_DATE);
        xlsTable1.easy_getCell(2, 0).setValue("03/14/2005 00:00:00");
        xlsTable1.easy_getCell(2, 0).setFormat(EasyXLS.Constants.Format.FORMAT_DATE);
        xlsTable1.easy_getCell(3, 0).setValue("03/15/2005 00:00:00");
        xlsTable1.easy_getCell(3, 0).setFormat(EasyXLS.Constants.Format.FORMAT_DATE);
        xlsTable1.easy_getCell(4, 0).setValue("03/16/2005 00:00:00");
        xlsTable1.easy_getCell(4, 0).setFormat(EasyXLS.Constants.Format.FORMAT_DATE);

        xlsTable1.easy_getCell(1, 1).setValue("10000");
        xlsTable1.easy_getCell(2, 1).setValue("5000");
        xlsTable1.easy_getCell(3, 1).setValue("8500");
        xlsTable1.easy_getCell(4, 1).setValue("1000");

        xlsTable1.easy_getCell(1, 2).setValue("8000");
        xlsTable1.easy_getCell(2, 2).setValue("4000");
        xlsTable1.easy_getCell(3, 2).setValue("6000");
        xlsTable1.easy_getCell(4, 2).setValue("1000");

        xlsTable1.easy_getCell(1, 3).setValue("920");
        xlsTable1.easy_getCell(2, 3).setValue("1005");
        xlsTable1.easy_getCell(3, 3).setValue("342");
        xlsTable1.easy_getCell(4, 3).setValue("967");

        // Set column widths
        xlsTable1.easy_getColumnAt(0).setWidth(100);
        xlsTable1.easy_getColumnAt(1).setWidth(100);
        xlsTable1.easy_getColumnAt(2).setWidth(100);
        xlsTable1.easy_getColumnAt(3).setWidth(100);
        
        // Create a chart
        ExcelChart xlsChart = new ExcelChart("A10", 600, 300);
        xlsChart.easy_addSeries("=SourceData!$B$1", "=SourceData!$B$2:$B$5");
        xlsChart.easy_addSeries("=SourceData!$C$1", "=SourceData!$C$2:$C$5");
        xlsChart.easy_addSeries("=SourceData!$D$1", "=SourceData!$D$2:$D$5");
        xlsChart.easy_setCategoryXAxisLabels("=SourceData!$A$2:$A$5");

        // Add the chart to the first worksheet
        ((ExcelWorksheet)workbook.easy_getSheet("SourceData")).easy_addChart(xlsChart);

        // Export Excel file
        Console.WriteLine("Writing file C:\\Samples\\Tutorial24 - chart inside worksheet.xlsx.");
        workbook.easy_WriteXLSXFile("C:\\Samples\\Tutorial24 - chart inside worksheet.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();
    }
}