NullPointerException on list.add

Question

I am getting a NullPointerException at the modelData.add(i, es) method. I know from debugging that es isn\'t null. I\'m r

Answer 1

Try

protected List<EventSeat> modelData = new ArrayList<EventSeat>(); 

Answer 2

On the first look, seems like modelData has not been instantiated. I would instantiate the modelData like:

protected List<EventSeat> modelData = new ArrayList<EventSeat>();

FYI.. In Java 7 there will be a new syntax you can use- someObject?.doSomething();

Answer 3

You need to initialize a List to not get the NullPointerException.

protected List<EventSeat> modelData = new ArrayList<EventSeat>();