java - ArrayList of String Arrays save last record only -


i need arraylist in java. spent long time debugging, still. problem - save data database string array , save array arraylist, in output saves last element multiple times. looks rewrite it.

string[] result=new string[2]; string userid=personal_organizer.userprofile.getuserid(); arraylist<object> params = new arraylist<object>();            params.add(userid); string query1 = "select * tblmemos "         + "_user_id = ?";  int rows; system.out.println(query1); executequeryp(query1, params);  arraylist<string[]> fetched = new arraylist<string[]>(); int i=0;  try {     while(rs.next()) {          result[0] = rs.getstring(2);         result[1] = rs.getstring(3);          system.out.print("counter: "+i);         try{             fetched.add(i,result);//here tried .add(result) , output same.             i++;         }catch(exception e){             system.out.println("exceptional exception "+e);         }      }     // check. have 2 records in db , shows last record twice      system.out.println(fetched.size());     system.out.println(fetched.get(0)[0]);     system.out.println(fetched.get(1)[0]); } // ...

you must create new array instance in each iteration:

while(rs.next()) {     result = new string[2];     result[0] = rs.getstring(2);     result[1] = rs.getstring(3);     fetched.add(result); }

otherwise adding same array instance multiple times list, , each iteration overwrites content of array latest data.


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