RandomAccessSubList not serialized

Question

I am trying to get a sublist of a List but I want the sublist to be serialized. I found out that when we get sublist from an ArrayList the sublist is not serialized.

To overcome this, this is what I am doing:

ArrayList serializedSublist = new ArrayList();
//getQuestions() returns RandomAccessSubList
getQuestions().addAll(serializedSublist); 
//problem is in the line below. serializedSublist is empty.
getRequest().getSession().setAttribute("questionsForUser", serializedSublist);

Problem is that serializedSubList is empty in line 5, eventhough in line 3 getQuestions() returns a list back.

Answer 1

You're adding it backwards, no? Shouldn't it be

serializedSublist.addAll(getQuestions());

or, better, yet

ArrayList serializedSublist = new ArrayList(getQuestions());