[Android.Runtime.Register("poll","()Ljava/lang/Object;","GetPollHandler:Java.Util.IQueueInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null")]publicJava.Lang.Object? Poll (); Returns Object the head of this queue, ornullif this queue is empty ...
Queue 中 remove() 和 poll() 都是用来从队列头部删除一个元素。 在队列元素为空的情况下,remove() 方法会抛出NoSuchElementException异常,poll() 方法只会返回 null 。 JDK1.8 中的源码解释 /** * Retrieves and removes the head of this queue. This method differs * from {@link#poll poll} only in...
AbstractQueue.Poll MethodReference Feedback DefinitionNamespace: Java.Util Assembly: Mono.Android.dll Retrieves and removes the head of this queue, or returns null if this queue is empty. C# 複製 [Android.Runtime.Register("poll", "()Ljava/lang/Object;", "GetPollHandler")] public ...
Poll() Attributes RegisterAttribute Remarks Portions of this page are modifications based on work created and shared by theAndroid Open Source Projectand used according to terms described in theCreative Commons 2.5 Attribution License. Applies to ...
[Android.Runtime.Register("poll","()Ljava/lang/Object;","GetPollHandler")]publicabstractJava.Lang.Object? Poll (); Returns Object the head of this queue, ornullif this queue is empty Implements Poll() Attributes RegisterAttribute Remarks ...
* Retrieves and removes the head of this queue. This method differs * from {@link #poll poll} only in that it throws an exception if this * queue is empty. * * @return the head of this queue * @throws NoSuchElementException if this queue is empty ...
poll()LinkedBlockingQueue的 poll() 方法通过从队列中删除元素来返回LinkedBlockingQueue的头部。可以说,这个方法从LinkedBlockingQueue的头部检索并删除元素。如果队列是空的,那么轮询方法返回null。语法public E poll() Java Copy返回值: 该方法从LinkedBlockingQueue的头部检索并删除元素。如果队列是空的,那么它返回...
{Queue<String> pq =newPriorityQueue<>();pq.add("Geeks");pq.add("For");pq.add("Geeks");System.out.println("Initial Queue "+ pq);pq.remove("Geeks");System.out.println("After Remove "+ pq);System.out.println("Poll Method "+ pq.poll());System.out.println("Final Queue "+ pq);...
1、remove,remove()是从队列中删除第一个元素。remove() 的行为与 Collection 接口的相似 2、poll,但是新的 poll() 方法时有值时返回值,在空集合调用时不是抛出异常,只是返回null, 3、take: 获取并移除此队列的头部,在元素变得可用之前一直等待 。queue的长度 == 0 的时候,一直阻塞 ...
Queue用于模拟"队列"这种数据结构(先进先出 FIFO)。队列的头部保存着队列中存放时间最长的元素,队列的尾部保存着队列中存放时间最短的元素。新元素插入(offer)到队列的尾部,访问元素(poll)操作会返回队列头部的元素,队列不允许随机访问队列中的元素。 【1】Queue的几个接口 ...