Retrieving specific data from excel

Hello everyone, i have written a simple code to retrieve data from excel sheet and working fine, the excel file contain heading for each row written in bold and the student details such as Sl.No, Name, Roll Number followed by it. I want only those students details to be printed. here is my sample code

try {

        FileInputStream file = new FileInputStream(new File("d:/file.xls"));

        //Get the workbook instance for XLS file 
        HSSFWorkbook workbook = new HSSFWorkbook(file);

        //Get first sheet from the workbook
        HSSFSheet sheet = workbook.getSheetAt(0);

        //Iterate through each rows from first sheet
        Iterator<Row> rowIterator = sheet.iterator();
        while(rowIterator.hasNext()) {
            Row row = rowIterator.next();

            //For each row, iterate through each columns
            Iterator<Cell> cellIterator = row.cellIterator();
            while(cellIterator.hasNext()) {

                Cell cell = cellIterator.next();

                switch(cell.getCellType()) {
                    case Cell.CELL_TYPE_BOOLEAN:
                        System.out.print(cell.getBooleanCellValue() + "\t\t");
                        break;
                    case Cell.CELL_TYPE_NUMERIC:
                        System.out.print(cell.getNumericCellValue() + "\t\t");
                        break;
                    case Cell.CELL_TYPE_STRING:
                        System.out.print(cell.getStringCellValue() + "\t\t");
                        break;
                }
            }
            System.out.println("");
        }
        file.close();
        FileOutputStream out = 
            new FileOutputStream(new File("d:/file.xls"));
        workbook.write(out);
        out.close();

    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

}

can anyone help me out