forEachRemaining() 。通过函数式接口 调用tryAdvance().
/** * Performs the given action for each remaining element, sequentially in * the current thread, until all elements have been processed or the action * throws an exception. If this Spliterator is {@link #ORDERED}, actions * are performed in encounter order. Exceptions thrown by the action * are relayed to the caller. * * @implSpec * The default implementation repeatedly invokes {@link #tryAdvance} until * it returns {@code false}. It should be overridden whenever possible. * * @param action The action * @throws NullPointerException if the specified action is null */ default void forEachRemaining(Consumer<? super T> action) { do { } while (tryAdvance(action)); }