zoukankan      html  css  js  c++  java
  • Java Iterable类

    查看java源代码

    /*
     * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
     * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
     *
     *
     *
     *
     *
     *
     *
     *
     *
     *
     *
     *
     *
     *
     *
     *
     *
     *
     *
     *
     */
    package java.lang;
    
    import java.util.Iterator;
    import java.util.Objects;
    import java.util.Spliterator;
    import java.util.Spliterators;
    import java.util.function.Consumer;
    
    /**
     * Implementing this interface allows an object to be the target of
     * the "for-each loop" statement. See
     * <strong>
     * <a href="{@docRoot}/../technotes/guides/language/foreach.html">For-each Loop</a>
     * </strong>
     *
     * @param <T> the type of elements returned by the iterator
     *
     * @since 1.5
     * @jls 14.14.2 The enhanced for statement
     */
    public interface Iterable<T> {
        /**
         * Returns an iterator over elements of type {@code T}.
         *
         * @return an Iterator.
         */
        Iterator<T> iterator();
    
        /**
         * Performs the given action for each element of the {@code Iterable}
         * until all elements have been processed or the action throws an
         * exception.  Unless otherwise specified by the implementing class,
         * actions are performed in the order of iteration (if an iteration order
         * is specified).  Exceptions thrown by the action are relayed to the
         * caller.
         *
         * @implSpec
         * <p>The default implementation behaves as if:
         * <pre>{@code
         *     for (T t : this)
         *         action.accept(t);
         * }</pre>
         *
         * @param action The action to be performed for each element
         * @throws NullPointerException if the specified action is null
         * @since 1.8
         */
        default void forEach(Consumer<? super T> action) {
            Objects.requireNonNull(action);
            for (T t : this) {
                action.accept(t);
            }
        }
    
        /**
         * Creates a {@link Spliterator} over the elements described by this
         * {@code Iterable}.
         *
         * @implSpec
         * The default implementation creates an
         * <em><a href="Spliterator.html#binding">early-binding</a></em>
         * spliterator from the iterable's {@code Iterator}.  The spliterator
         * inherits the <em>fail-fast</em> properties of the iterable's iterator.
         *
         * @implNote
         * The default implementation should usually be overridden.  The
         * spliterator returned by the default implementation has poor splitting
         * capabilities, is unsized, and does not report any spliterator
         * characteristics. Implementing classes can nearly always provide a
         * better implementation.
         *
         * @return a {@code Spliterator} over the elements described by this
         * {@code Iterable}.
         * @since 1.8
         */
        default Spliterator<T> spliterator() {
            return Spliterators.spliteratorUnknownSize(iterator(), 0);
        }
    }
  • 相关阅读:
    关于xml中有特珠字符而导致XmlDocument无法Load的处理
    【转载】Session分布式共享 = Session + Redis + Nginx
    jQuery ajax 请求php遍历json数组到table中
    VS2015+MySql+EF6采坑经验总结
    请教如何用ASP.NET实现http://abc.com/orderID这样的URL???
    silverlight chart 折线图 的线颜色如何修改???
    SL 的 DATAGRID中如何加入计算列?
    中软酒店管理系统之会员消费短信提醒工具开发
    enable_shared_from_this
    python,flask,login,login_request
  • 原文地址:https://www.cnblogs.com/LoganChen/p/8585001.html
Copyright © 2011-2022 走看看