Java adds data validation to excel with POI

string path =  "D:\\success.xlsx";        string  sheetname =  "Sheetlist";         xssfworkbook wb =  null;        XSSFSheet sheetlist = null;         file inputfile = new file (PATH);         if  (Inputfile.exists ())  {             wb = new xssfworkbook (New fileinputstream (path));         } else {             wb = new xssfworkbook ();// excel file Object          }        if  (Wb.getsheet (sheetname)   == null)  { &nbsP;          sheetlist = wb.createsheet (SheetName) ;//  Sheet Objects         } else {             sheetlist = wb.getsheet (sheetName);//  Sheet Object          }         Datavalidationhelper helper = sheetlist.getdatavalidationhelper ();         List<XSSFDataValidation> dataValidations =  Sheetlist.getdatavalidations ();        for  (XSSFDataValidation  dv : datavalidations)  {             //  Existing Validation         }         //        cellrangEaddresslist dstaddrlist = new cellrangeaddresslist (0, 500, 0, 0);//  Rule one cell range         String[] textlist = {  "List 1",  "List 2",  "List 3",  "List 4",  "List 5"  };         Datavalidation dstdatavalidation = helper.createvalidation (Helper.createexplicitlistconstraint ( textlist),                 dstaddrlist);         dstdatavalidation.createpromptbox ("Cue header",  " Prompt content ");         dstdatavalidation.setshowerrorbox (True);         dstdatavalidation.setshowpromptbox (True);         dstdatavalidation.setemptycellallowed (False);         sheetlist.addvalidationdata (DstdataValidation);         cellrangeaddresslist dstaddrlist2 =  new cellrangeaddresslist (0, 500, 1, 1);//  rule two cell range          datavalidationconstraint dvc = helper.createnumericconstraint ( dvconstraint.validationtype.integer,                 DVConstraint.OperatorType.BETWEEN,  "0",  "9999999999");         datavalidation dstdatavalidation2 = helper.createvalidation (DVC, &NBSP;DSTADDRLIST2);         dstdatavalidation2.createerrorbox ("Fill the wrong and lose!") ", " can only fill that what what what ");         dstdatavalidation2.setemptycellallowed ( FALSE);         dstdatavalidation2.setshowerrorbox (True);         sheetliSt.addvalidationdata (dstDataValidation2);         fileoutputstream  out = new fileoutputstream (path);         wb.write (out);         out.close ();

Java adds data validation to excel with POI