专门针对于原生的迭代器（int, long, double）
/** * A Spliterator specialized for primitive values. * * @param <T> the type of elements returned by this Spliterator. The * type must be a wrapper type for a primitive type, such as {@code Integer} * for the primitive {@code int} type. * @param <T_CONS> the type of primitive consumer. The type must be a * primitive specialization of {@link java.util.function.Consumer} for * {@code T}, such as {@link java.util.function.IntConsumer} for * {@code Integer}. * @param <T_SPLITR> the type of primitive Spliterator. The type must be * a primitive specialization of Spliterator for {@code T}, such as * {@link Spliterator.OfInt} for {@code Integer}. * * @see Spliterator.OfInt * @see Spliterator.OfLong * @see Spliterator.OfDouble * @since 1.8 */ public interface OfPrimitive<T, T_CONS, T_SPLITR extends Spliterator.OfPrimitive<T, T_CONS, T_SPLITR>> extends Spliterator<T> { @Override T_SPLITR trySplit(); /** * If a remaining element exists, performs the given action on it, * returning {@code true}; else returns {@code false}. If this * Spliterator is {@link #ORDERED} the action is performed on the * next element in encounter order. Exceptions thrown by the * action are relayed to the caller. * * @param action The action * @return {@code false} if no remaining elements existed * upon entry to this method, else {@code true}. * @throws NullPointerException if the specified action is null */ @SuppressWarnings("overloads") boolean tryAdvance(T_CONS action); /** * 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 */ @SuppressWarnings("overloads") default void forEachRemaining(T_CONS action) { do { } while (tryAdvance(action)); } }提供了三个特化版本。实现了OfPrimitive接口。
OfInt
OfLong