Create Excelsheet with dropdown using POI library in java

ExcelGenerator.java

package com.trustrace;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.time.Instant;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DataValidation;
import org.apache.poi.ss.usermodel.DataValidationConstraint;
import org.apache.poi.ss.usermodel.DataValidationHelper;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddressList;
import org.apache.poi.xssf.usermodel.XSSFDataValidationHelper;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ExcelGenerator {

    public static void main(String[] args) throws IOException {
        //SpringApplication.run(Application.class, args);
        Workbook wb = new XSSFWorkbook();
        XSSFSheet sheet = (XSSFSheet) wb.createSheet("Example");
        sheet.setColumnWidth(0, 2);
        //sheet.setColumnWidth(0, 2);

        Row headerRow = sheet.createRow(0);
        for (int i = 0; i < 10; i++) {
            Cell cell = headerRow.createCell(i);
            cell.setCellValue("Title" + i);
        }
        for (int i = 1; i <= 10; i++) {
            Row row = sheet.createRow(i);
            for (int j = 0; j < 10; j++) {
                Cell cell = row.createCell(j);
                cell.setCellValue("SELECT");
            }
        }
        for (int i = 0; i < 10; i++) {
            sheet.autoSizeColumn(i);
        }
        DataValidation dataValidation = null;
        DataValidationConstraint constraint = null;
        DataValidationHelper validationHelper = null;

        validationHelper = new XSSFDataValidationHelper(sheet);
        CellRangeAddressList addressList = new CellRangeAddressList(1, 11, 0, 9);
        constraint = validationHelper.createExplicitListConstraint(new String[]{"10", "20", "30"});
        dataValidation = validationHelper.createValidation(constraint, addressList);
        dataValidation.setSuppressDropDownArrow(true);
        sheet.addValidationData(dataValidation);
        File file = new File("/home/karthikeyan/repo/tt-service/example" + Instant.now() + ".xlsx");
        file.createNewFile();
        FileOutputStream outputStream = new FileOutputStream(file, false);
        wb.write(outputStream);

    }
}

Could you please provide me dropdown event in excel using apache poi?