How to Create a Formula in Excel using Java?

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class GFG {
    public static void main(String[] args) throws Exception
    {

        // Naming WorkBook
        String excelfilename = "GeeksForGeeks.xlsx";

        // Creating Workbook
        XSSFWorkbook workbook = new XSSFWorkbook();

        // Creating Spreadsheet
        XSSFSheet spreadsheet
            = workbook.createSheet("formula");

        // Create a row object using XSSFRow for creating
        // Row
        XSSFRow row;

        // Create a column object using XSSFCell for
        // creating Cell
        XSSFCell cell;

        // Creating row and start from 0 index value
        row = spreadsheet.createRow(1);
        // Creating column and start from 0 index value
        cell = row.createCell(1);
        // set Value of cell to apply formula
        cell.setCellValue("Value of X = ");
        cell = row.createCell(2);
        cell.setCellValue(5.0);

        row = spreadsheet.createRow(2);
        cell = row.createCell(1);
        cell.setCellValue("Value of Y = ");
        cell = row.createCell(2);
        cell.setCellValue(10);

        row = spreadsheet.createRow(3);
        cell = row.createCell(1);
        cell.setCellValue("SUM = ");
        cell = row.createCell(2);

        // Creating SUM formula
        cell.setCellFormula("SUM(C2:C3)");
        cell = row.createCell(3);
        cell.setCellValue("SUM(C2:C3)");

        row = spreadsheet.createRow(4);
        cell = row.createCell(1);
        cell.setCellValue("POWER =");
        cell = row.createCell(2);

        // Create POWER formula
        cell.setCellFormula("POWER(C2,C3)");
        cell = row.createCell(3);
        cell.setCellValue("POWER(C2,C3)");

        row = spreadsheet.createRow(5);
        cell = row.createCell(1);
        cell.setCellValue("MAX = ");
        cell = row.createCell(2);

        // Creating MAX formula
        cell.setCellFormula("MAX(C2,C3)");
        cell = row.createCell(3);
        cell.setCellValue("MAX(C2,C3)");

        row = spreadsheet.createRow(6);
        cell = row.createCell(1);
        cell.setCellValue("ABS Value = ");
        cell = row.createCell(2);

        // Creating Absolute number formula
        cell.setCellFormula("ABS(C2)");
        cell = row.createCell(3);
        cell.setCellValue("ABS(C2)");

        row = spreadsheet.createRow(7);
        cell = row.createCell(1);
        cell.setCellValue("PRODUCT = ");
        cell = row.createCell(2);

        // Creating SQRT formula
        cell.setCellFormula("PRODUCT(C2,C3)");
        cell = row.createCell(3);
        cell.setCellValue("PRODUCT(C2,C3)");

        // This is a helpful wrapper around looping over
        // allcells, and calling evaluateFormulaCell on each
        // one.
        workbook.getCreationHelper()
            .createFormulaEvaluator()
            .evaluateAll();

        // To make Auto size column
        spreadsheet.autoSizeColumn(1);
        spreadsheet.autoSizeColumn(2);
        spreadsheet.autoSizeColumn(3);

        try {
            // Place the output file in default location and
            // also kept in try catch block
            FileOutputStream outputfile
                = new FileOutputStream(excelfilename);

            // Write to workbook
            workbook.write(outputfile);

            // Close the output file
            outputfile.close();

            // Display message for console window when
            // program is successfully executed
            System.out.println(excelfilename
                               + " is written successfully");
        }
        catch (FileNotFoundException e) {

            // Display error message for console window when
            // program is not successfully executed
            System.out.println("ERROR!! " + e.getMessage());
        }
        finally {
            workbook.close();
        }
    }
}