JDK1.5版本中,加入java.uill.concurrent包,其中包含集合的线程安全方式的实现。本文仅探讨concurrent包下面的Collection接口实现。 目录 1. concurrent包下面Collection子接口、类框架图 2. CopyOnWriteArraySet类 3. CopyOnWriteArrayList类 4. ConcurrentLinkedQueue类 5. BlockingQueue接口 5.1 ArrayBlockingQueue 5.2 LinkedB...
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...
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...
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.BlockingDeque The other collection interfaces are based onjava.util.Mapand are not true collections. However, these interfaces containcollection-viewoperations, which enable them to be manipulated as collections. Map has the following offspring: ...
Interfaces Java.Security.Spec Java.Sql Java.Text Java.Time Java.Time.Chrono Java.Time.Format Java.Time.Temporal Java.Time.Zone Java.Util Java.Util.Concurrent Java.Util.Concurrent AbstractExecutorService ArrayBlockingQueue BrokenBarrierException CancellationException CompletableFuture CompletableFuture.I...
-集合结构只要发生改变,迭代器必须重新获取,如果还是用的之前的迭代器,就会出现异常java.util.ConcurrentModificationException shaoshaossm 2022/12/27 5160 java集合之Collection 网站编程算法存储容器java 说明:此时的存储,主要指的是内存层面的存储,不涉及到持久化的储存(.text,.jpg,avi,数据库中) OY 2022/02/21...
首先对当前(JDK1.8)整体实现有一个大概认知,下图包含了核心Interfaces和主要实现(不包含java concurrent包里的集合实现)。 虚线框代表接口,实线框是普通(具体)类。最常用的集合使用加粗的实线框来表示。 从图中可以看到,实际上只有四个基本的集合组件——Map、List、Set和Queue,而且每个组件只有两到三个实现(java.ut...
This class and its iterator implement all of the optional methods of theDequeandIteratorinterfaces. Memory consistency effects: As with other concurrent collections, actions in a thread prior to placing an object into aConcurrentLinkedDequehappen-before actions subsequent to the access or removal of t...
java.util.concurrent Utility classes commonly useful in concurrent programming. javax.tools Provides interfaces for tools which can be invoked from a program, for example, compilers. Uses ofCallableinjava.util.concurrent Methods injava.util.concurrentthat returnCallable ...