Writing data into excel sheet

FileInputStream fis=new FileInputStream("E:\\data.xlsx");              Workbook wb=WorkbookFactory.create(fis);

Sheet s=wb.getSheet("test");//sheet name

s.createRow(1).createCell(1).setCellValue("Java");

FileOutputStream fos = new  FileOutputStream("E:\\data.xlsx");

 wb.write(fos);

 fos.close();

System.out.println("Success");

                 }