I have two lists

List<User> list_of_users=new ArrayList<User>();
List<String> list_of_attributes=new ArrayList<String>();

When i try to use the following lines of code:

model.addAttribute("takeattributes",list_of_users);
model.addAttribute("takeattributes",list_of_attributes);

I realise that it keeps only the second list (list_of_attributes) and the first deleted. I was wondering how to keep both of these two lists in the model.Is this possible to be happened?Is the AddAllAttributes method what i need?If yes can anyone explain me how the AddAllAttributes method is working.I look at the spring mvc documentation but i didn't really understand.