该例子展示了一个Java集合中迭代器的常用用法
public class LinkedListTest {

    public static void main(String[] args) {

        List<String> a = new LinkedList<String>();

        a.add("Amy");

        a.add("Carl");

        a.add("Erica");

        List<String> b = new LinkedList<String>();

        b.add("Bob");

        b.add("Doug");

        b.add("Frances");

        b.add("Gloria");

        ListIterator<String> aIter = a.listIterator();

        Iterator<String> bIter = b.iterator();

        while (bIter.hasNext()) {

            if (aIter.hasNext()) aIter.next();

            aIter.add(bIter.next());

        }

        System.out.println(a);

        bIter = b.iterator();

        while (bIter.hasNext()) {

            bIter.next();

            if (bIter.hasNext()) {

                bIter.next();

                bIter.remove();

            }

        }

        System.out.println(b);

        a.removeAll(b);

        System.out.println(a);

    }

}