android - Java iterator nested List -

i have simple class structure :

public class messageslist {     private int id;     private int msg_id; } 

for , set data database,o'm using code :

list<messageslist> item =         g.dbhelper.getrawrow("select * messageslist group msg_id"); 

to query database, result is:

item = {arraylist@830033903920}  size = 2   0 = {string[14]@830033903944}      0 = {string@830033904024} "1"     1 = {string@830033904080} "1"  1 = {string[14]@830033905064}      0 = {string@830033905144} "2"     1 = {string@830033905200} "2" 

now i'm trying iterator nested list :

    (int i=0;i<item.size();i++) {         log.e("",item.get(i).getid()+"");      } 

i error , app dont work, how iterator nested list? thanks

error:

java.lang.classcastexception: java.lang.string[] cannot cast ir.tsms.eitaapro.helper.database.models.messageslist

the problem here

list<messageslist> item =         g.dbhelper.getrawrow("select * messageslist group msg_id"); 

string object coming database.

solution: length of data , 1 one. :

list<messageslist> item=new arraylist<>();  for(int i=0;i yourdatalength;i++) {     item.add( messagelist data database); }