Write several time in an excel file?

Question

Hi
I'm using a excel file to take back data from GPIB device.
so I need to create an excel file
write the data and this several time in the same seet.
WritableWorkbook workbook = Workbook.createWorkbook(new File(Fo));
         WritableSheet sheet = workbook.createSheet("First Sheet", 0);
       if(new_run==true && allowoverwrite==true){
         Label label = new Label(0, 2, "NEW RUN");
         sheet.addCell(label);
        new_run=false;
   Label label = new Label(0, ww, bonnevar);
         sheet.addCell(label);
          Number number = new Number(1,ww, bonnevalue);
         sheet.addCell(number);
         ww=ww+1;
        workbook.write();
        workbook.close();                          
          catch(Exception ex) {
             JOptionPane.showMessageDialog(null, "Impossible de cr�er le fichier xls", "Erreur", JOptionPane.ERROR_MESSAGE);
           }if i had to write only one value in the excel file it is OK it works.
but if i have to write 2 data and more (i mean i need to enter 2 times in the loop) the first data are deleted and replace by the new one.
i'm affraid it comes from the fact i recreate each time a workbook and a sheet.
but i don't know how to solve my issue.
do you know if it is possible to open an excel file, write data , close the excel file , then reopen the same excel file and add data without erase the pervious one
thanks a lot for your help
BR

Answer 1

bonjour
et oui je suis francais :)
my english is so bad isn't it :)
so effectively there is no loop because the source code i have inserted is a small part of my entire code.
but recursively i come on this part of the code that why i have spoke about a loop.
and each time I want to write something on the excel file, the previous data are erased and replace by the new one....
so if you have any idea so solve this it would be great...
ciao