public static void main(String[] args) { CreateCSVFile csvFile = new CreateCSVFile(); HSSFWorkbook workBook = csvFile.createWorkBook(); HSSFSheet workSheet = csvFile.createWorkSheet(workBook); Map<String, Object[]> data = csvFile.getData(); csvFile.createStyles(workBook, workSheet); populateDataToWorkSheet(csvFile, workSheet, data); csvFile.writeToFile(workBook); }