Java

if (name == null || name.isEmpty()) {
// or maybe you really mean
if (name != null && !name.isEmpty()) {

private void doCheck() {
   if (name != null && name != "") { // always check first for null
      for (String year : years) { // years only need to be checked when name was ok
         if (year != null && year != "" ) {
            try{
                int i = Integer.parseInt(year);
                // you can check if the number has a valid value here 
                // (e.g. between 1900 and 2012 (now-18 for adult check)
            }
            catch(Exception oException){
                /* not a valid number */   
            }
          }
      }
      for (String studyChoice : studyChoices) {
         if (studyChoice!=null && studyChoice != ""){
            /*Check for valid study course here - I suggest an Enum for the fixed range of valid values*/
         }
      }
   }
   else{ /*not even a valid name is given*/ }
}

prithaa wrote:

Is there an article to open an excel file

prithaa wrote:

a new file is created instead of opening the old file.

InputStream inp = new FileInputStream("d:/Writefile.xls");    
		WorkbookSettings ws = new WorkbookSettings();
		Workbook wb = Workbook.getWorkbook(inp, ws);
		Sheet sheet = wb.getSheet(0);  
		//Cell cells[] = sheet.getRow(0);     
		//Cell cell = cells[0];
		//String cellContents = cell.getContents(); 
		//Modify the cellContents here     
		//Write the output to a file 		
		Number number;
		number = new Number(0, 0, 453.25, times);
		((WritableSheet) sheet).addCell(number);
		wb.close();

((WritableSheet) sheet).addCell(number);

WritableWorkbook creates a new workbook and has no method which opens a workbook

workbook

prithaa wrote:

thanks for the article

prithaa wrote:

but i cant still open a writableworkbook

Workbook workbook = Workbook.getWorkbook(new File("d:/Writefile.xls"));
WritableWorkbook copy = Workbook.createWorkbook(new File("d:/Writefile1.xls"), workbook);
copy.write();
WritableSheet sheet = copy.getSheet("Report2");
Number number;
number = new Number(0, 0, 453.25, times);		
sheet.addCell(number);
copy.write();
copy.close();