JSON data arraylist and sqlite data arraylist compared to each other after compare data not same after inserted in sqlite database in android -

json data stored in arraylist , sqlite data stored arraylist. 2 database compare each other.in json arraylist new updated data stored in database.json , sqlite database data not same after stored in sqlite database. or give me easy way json data stored in sqlite database.

mainactivity

        try         {             jsonarray jsonarray = new jsonarray(s);              if(jsonarray != null){                  (int = 0; < 1 ;i++) {                      jsonobject jsonobject = jsonarray.getjsonobject(i);                      studentname = jsonobject.getstring("studentname");                     rollno = jsonobject.getdouble("rollno");                     standard = jsonobject.getstring("standard");                     division = jsonobject.getstring("division");                     fatherno = jsonobject.getdouble("smsno");                      address = jsonobject.getstring("std_address");                     school = jsonobject.getstring("schoolname");                      image = jsonobject.getstring("imagepath");                      stdid = jsonobject.getlong("stdid");                     divid = jsonobject.getlong("divisionid");                      string date = jsonobject.getstring("dob");                     string replacedate = date.replace("/date(", "").replace(")/", "");                     long getdate = long.valueof(replacedate);                     dob = dateformat.format(getdate);                      hashmap<string, string> map = new hashmap<string, string>();                     // map.put("id", cursor.getstring(0));                     map.put("username", studentname);                     map.put("dob", dob);                     map.put("rollno", string.valueof(rollno));                     map.put("std", standard);                     map.put("div", division);                     map.put("mobileno", string.valueof(fatherno));                     map.put("address", address);                     map.put("school", school);                      jsonlist = new arraylist<>();                       jsonlist.add(map);                    }                  dbhelper db = new dbhelper(getapplicationcontext());                  arraylist<hashmap<string,string>> list = db.getallregistrationdata();                  (int j = 0; j< jsonlist.size(); j++ ){                     (int k = 0; k < list.size(); k++){                          if (jsonlist.get(j).equals(list.get(k))){                              toast.maketext(registration_activity.this, "alredy exist", toast.length_short).show();                         }else {                              long id = db.insertregistration(studentname,rollno,standard,division,fatherno,address,school,dob);                              toast.maketext(registration_activity.this, "insert id : " + id, toast.length_short).show();                         }                     }                 }             }          } catch (jsonexception e) {             e.printstacktrace();         } 

dbhelper

public arraylist<hashmap<string,string>> getallregistrationdata(){     arraylist<hashmap<string,string>> list = new arraylist<hashmap<string, string>>();      sqlitedatabase db = getreadabledatabase();      cursor cursor = db.rawquery("select * "+table_registration,null);      if (cursor.movetofirst()) {         {             hashmap<string, string> map = new hashmap<string, string>();              map.put("id", cursor.getstring(0));             map.put("username", cursor.getstring(1));             map.put("dob", cursor.getstring(2));             map.put("rollno", cursor.getstring(3));             map.put("std", cursor.getstring(4));             map.put("div", cursor.getstring(5));             map.put("mobileno", cursor.getstring(6));             map.put("address", cursor.getstring(7));             map.put("school", cursor.getstring(8));                list.add(map);         } while (cursor.movetonext());     }      return list;   }