So Close, Yet So Far. (iterators, next, hasnext)

Question

I am so close to finishing the Java course, but I cannot get past the 2nd to last question. The question:

What does the following code output?

ArrayList<Integer> list = new ArrayList<Integer>();
for (int i = 0; i < 6; i++) {
list.add(i);
}
int x = 0;
Iterator<Integer> it = list.iterator();
while (it.hasNext()) {
x+= it.next();
}
System.out.println(x);

The Problem:

I've gotten a few legitimate answers and I have plugged them in, but all of them were incorrect.

Answer 1

This code adds the numbers 0 to 5 in a list and adds them, so you get 0 + 1 + 2 + 3 + 4 + 5 = 15.

Answer 2

15

Answer 3

Nevermind. I got the answer.

Answer 4

15