precesljao sam malo internet i nasao sam ovo:
http://stackoverflow.com/questions/1...ing-excel-file
Kod:
Workbook existingWorkbook = Workbook.getWorkbook(new File(fileToEdit.getAbsolutePath()));
WritableWorkbook workbookCopy = Workbook.createWorkbook(new File("output.xls"), existingWorkbook);
WritableSheet sheetToEdit = workbookCopy.getSheet(sheetName);
WritableCell cell;
Label l = new Label(currentColumn, currentRow, value);
cell = (WritableCell) l;
sheetToEdit.addCell(cell);
workbookCopy.write();
workbookCopy.close();
existingWorkbook.close();
Ali mi ovaj kod izbacuje null pointer exception, takodje sam utvrdio da taj problem pravi ova linija: sheetToEdit.addCell(cell); Jel moze neko da mi pomogne da resim ovaj problem zezam se vec 5 dana sa ovim i nikako da zavrsim program?