I'm using jxl api for editing an existing excel file. But when i try to add a new column and write the sheet its showing null pointer exception. The code that I'm using is as shown below :
File file = new File("d:\\test.xls");
Workbook workbook;
WritableWorkbook copy = null;
if (file.exists()) {
try {
workbook = Workbook.getWorkbook(file);
copy = Workbook.createWorkbook(new File("C:\\TEMP\\temp.xls"),
workbook);
} catch (BiffException e) {
e.printStackTrace();
} catch (FileNotFoundException fnf) {
fnf.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
WritableSheet sheet = copy.getSheet(0);
sheet.insertColumn(2); //this statement causes error
//if I comment it the code works fine
try {
copy.write();
copy.close();
}
catch(Exception e)
{
e.printStackTrace();
}
Please help me to solve this problem and insert new column .
I'm able to edit the single cells of excel successfully and write the file.
Probably the api you are using is not the best one. I also had this problem (nullpointer exception at the insertcolumn line) and couldnt find any solution until I downloaded jexcelapi.
HTH