How to insert date selected separately into mysql using Java(JSP) -

in project want save date read separately day,month,year using select box. code used is

<%      string value=null;      string[] h=null;       h=request.getparametervalues("qns[]");      string expert=request.getparameter("expert");      int sday=integer.parseint(request.getparameter("sday"));      int smonth=integer.parseint(request.getparameter("smonth"));      int syear=integer.parseint(request.getparameter("syear"));      int eday=integer.parseint(request.getparameter("eday"));      int emonth=integer.parseint(request.getparameter("emonth"));      int eyear=integer.parseint(request.getparameter("eyear"));      string start=syear+"-"+smonth+"-"+sday;      string end=eyear+"-"+emonth+"-"+eday;        for(int i=0;i<h.length;i++)       {           s.savetask(h[1],expert,start,end);       }    %> 

the savetask function is

  public int savetask(string qnid,string userid,string start,string end)   {      int n=0;      try{           string sql="insert task(user_id,question_id,start_date,end_date,status)values('"+qnid+"','"+userid+"','"+start+"','"+end+"',0";          n = db.modifyingqueries(sql);      }      catch(exception e){       }      return n;  } 

but not inserting values table task table format task is

task_id      int (auto increment) user_id      int question_id  int start_date   date  end_date     date status       int 

first of all, sql line invalid.missing bracket in end.

   string sql="insert task(user_id,question_id,start_date,end_date,status)values                             ('"+qnid+"','"+userid+"','"+start+"','"+end+"',0");                                                                             ^ 

one more syntax error there no need " after 0 in end since int(realized after updated column structure).

still if face further exceptions,provide stack trace.

update(comment helpful resolve issue):

what have after line string sql = ...,put system.out.println(sql) prints query in console.pick line , fire on data base query manager.and see syntax errors.