java - Null Pointer Exception from JCalander Combobox -


my java application produces null pointer exception jcalander combobox. tried catch error. didnt work. can assist me fix this. please.

exception in thread "awt-eventqueue-0" java.lang.nullpointerexception @ java.util.calendar.settime(calendar.java:1106) @ java.text.simpledateformat.format(simpledateformat.java:955) @ java.text.simpledateformat.format(simpledateformat.java:948) @ java.text.dateformat.format(dateformat.java:336) @ org.freixas.jcalendar.jcalendarcombo.paramstring(jcalendarcombo.java:780) @ java.awt.component.tostring(component.java:8095)    tbmodel = (defaulttablemodel)tblitmqty.getmodel();         system.out.println(calrecvdate.getdate());         try{         if(calrecvdate.getdate()==null){ // error             joptionpane.showmessagedialog(null, "please select shippment received date");               calrecvdate.requestfocus();          }else if(txtshipss.gettext().isempty()){

////////////////////////////////////////////////////////////////

  if (inputvalidate() == true) {                try {                     string shipid = txtshipid.gettext();                     string invid = txtinvoice.gettext();                     string shipss = txtshipss.gettext();                     string address = txtntfaddress.gettext();                     string sipper = txtashipper.gettext();                     string vessal = txtvessal.gettext();                     date rcvdate = calrecvdate.getdate(); // jcalander                     string consignee = txtconsigne.gettext();                       arraylist<shippmentitems> shipitems = new arraylist<shippmentitems>();                     tbmodel = (defaulttablemodel) tblitmqty.getmodel();                      (int = 0; < tbmodel.getrowcount(); i++) {                           string itmcode = (string) tbmodel.getvalueat(i, 0);                           string itmname = (string) tbmodel.getvalueat(i, 1);                           int qty = (int) tbmodel.getvalueat(i, 2);                           shippmentitems shpitems = new shippmentitems(shipid, itmcode, itmname, qty);                           shipitems.add(shpitems);                     }

since throws npe:

calrecvdate.getdate()==null

the calrecvdate variable null, , either need check if it's null before using it, or make sure isn't null tracing in code think you've initialized , fix problem (since isn't initialized).

to check if it's null, do:

if (calrecvdate != null) {   // use calrecvdate variable here } else {   // initialize calrecvdate variable here    // or perhaps better, display joptionpane error message user   // date hasn't been selected, , exit method calling return:    return; }

again, don't use try/catch blocks handle nullpointerexceptions.


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