How does the enhanced for statement work for arrays, and how to get an iterator for an array?

Question

Given the following code snippet:

int[] arr = {1, 2, 3};
for (int i : arr)
    System.out.println(i);

I have the following questions:

Answer 1

I like the answer from 30thh using Iterators from Guava. However, from some frameworks I get null instead of an empty array, and Iterators.forArray(array) does not handle that well. So I came up with this helper method, which you can call with Iterator it = emptyIfNull(array);

public static  UnmodifiableIterator emptyIfNull(F[] array) {
    if (array != null) {
        return Iterators.forArray(array);
    }
    return new UnmodifiableIterator() {
        public boolean hasNext() {
            return false;
        }

        public F next() {
            return null;
        }
    };
}