当许多线程共享访问一个公共collection 时,ConcurrentLinkedQueue 是一个恰当的选择。此队列不允许 null 元素。 此实现采用了有效的“无等待 (wait-free)”算法。与大多数 collection 不同,size 方法不是 一个固定时间的操作。由于这些队列的异步特性,确定当前元素的数量需要遍历这些元素。 5. BlockingQueue接口 Blocki...
When you need to work with data collections in a concurrent program, you must be very careful with the implementation you choose.Most collection classes are not ready to work with concurrent applications because they don't control the concurrent access to its data. If some concurrent tasks share...
用于多线程上下文中的 Collection 实现:ConcurrentHashMap、ConcurrentSkipListMap、ConcurrentSkipListSet、CopyOnWriteArrayList 和 CopyOnWriteArraySet。 当期望许多线程访问一个给定 collection 时,ConcurrentHashMap 通常优于同步的 HashMap,ConcurrentSkipListMap 通常优于同步的 TreeMap。 当期望的读数和遍历远远大于列表的更新...
java.util.concurrent(并发包)提供了一些列较为给力的并发技术,主要有: 为了保证用户自定义的多线程共享对象 的访问安全性,提供了以下新增工具类: 原子(Atomic)类型:如AtomicInteger、AtomicReference等,保证变量的原子性和可见性。 显式锁(Lock)接口:对之前版本锁机制的重构,相较于synchronized 关键字,能够提供更加灵活...
This class and its iterator implement all of the optional methods of the Collection and Iterator interfaces. Memory consistency effects: As with other concurrent collections, actions in a thread prior to placing an object into a LinkedTransferQueuehappen-before actions subsequent to the access ...
It is possible for aQueueimplementation to restrict the number of elements that it holds; such queues are known asbounded. SomeQueueimplementations injava.util.concurrentare bounded, but the implementations injava.utilare not. Theaddmethod, whichQueueinherits fromCollection, inserts an element unless ...
Thecollection interfacesare divided into two groups. The most basic interface,java.util.Collection, has the following descendants: java.util.Set java.util.SortedSet java.util.NavigableSet java.util.Queue java.util.concurrent.BlockingQueue java.util.concurrent.TransferQueue ...
Esta clase y su iterador implementan todos los <métodos opcionales> de las Collection interfaces y Iterator . Esta clase es miembro de Java Collections Framework. Agregado en la versión 1.6. Documentación de Java para java.util.concurrent.LinkedBlockingDeque.Las partes...
java.util.concurrent Class ConcurrentHashMap<K,V>java.lang.Object java.util.AbstractMap<K,V> java.util.concurrent.ConcurrentHashMap<K,V> Type Parameters: K - the type of keys maintained by this map V - the type of mapped valuesAll Implemented Interfaces: Serializable, ConcurrentMap<K,V>, ...
Util.Concurrent Assembly: Mono.Android.dll A reusable synchronization barrier, similar in functionality to CyclicBarrier and CountDownLatch but supporting more flexible usage. C# 复制 [Android.Runtime.Register("java/util/concurrent/Phaser", DoNotGenerateAcw=true)] public class Phase...