Wildcard Types

• public void addAll(LinkedList<? extends E> other)
  {
     ListIterator<E> iter = other.listIterator();
     while (iter.hasNext()) add(iter.next());
  }

• public static <E extends Comparable<E>> E min(E[] a)

• public static <E extends Comparable<? super E>> E min(E[] a)

• static void reverse(List<?> list)

  You can think of that declaration as a shorthand for

  static void <T> reverse(List<T> list)