// Example code using an iterator.
public class ArrayIntListExample {
    public static void main(String[] args) {
        // Create a new list and add some things to it.
        ArrayIntList list = new ArrayIntList();
        list.add(12);
        list.add(3);
        list.add(3);
        list.add(72);
        list.add(42);
        list.add(3);
        list.add(-19);
        System.out.println("list = " + list);
        
        // Compute sum, using for loop.
        int sum = 0;
        for (int i = 0; i < list.size(); i++) {
            sum += list.get(i);
        }
        System.out.println("list sum = " + sum);
        
        // Compute product, using iterator.
        int product = 1;
        ArrayIntListIterator i = list.iterator();
        while (i.hasNext()) {
            int value = i.next();
            product = product * value;
            System.out.println("value = " + value);
            if (value == 3) {
                i.remove();
            }
        }
        System.out.println("product = " + product);
        System.out.println("list = " + list);
    }
}