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在Java并发编程中，ReentrantLock 是一个功能强大的同步工具，它提供了比 synchronized 关键字更为丰富的功能。ReentrantLock 是 java.util.concurrent.locks 包中的一个类，它允许完全的轮询和定时锁等候，以及可中断的锁定和尝试（非阻塞）锁...

Java——多线程高并发系列之ReentrantLock实现（非）公平锁、常用方法的举例

文章目录：写在前面Demo1（公平锁与非公平锁）Demo2（int getHoldCount() 返回当前线程调用 lock()方法的次数）Demo3（int getQueueLength() 返回正等待获得锁的线程预估数）Demo4（int getWaitQueueLength(Co...

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文章目录：写在前面说说synchronized和Lock的区别？Demo1（先演示一下锁的可重入性）Demo2（ReentrantLock的基本使用）Demo3（使用Lock锁同步不同方法中的代码块）Demo4（ReentrantLock锁的可重入性）Dem...

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锁的概念从jdk发行1.5版本之后，在原来synchronize的基础上，增加了重入锁ReentrantLock。本文就不介绍synchronize了，有兴趣的同学可以去了解一下，本文重点介绍ReentrantLock。锁是什么？并发编程的时候，比如说有一个业务是读写操作，那多个线程执行这个...

java多线程：并发包中ReentrantLock锁的公平锁原理

一：锁的原理结构（1）锁对象内部维护了一个同步管理器的对象AbstractQueuedSynchronizer，AbstractOwnableSynchronizer （2）该对象其实是一个抽象类，具体的锁的管理器继承该抽象类（3）该抽象类的关键属性有：---->Thread exclus...

java多线程之：Java中的ReentrantLock和synchronized两种锁定机制的对比（转载）

原文：http://www.ibm.com/developerworks/cn/java/j-jtp10264/index.html 多线程和并发性并不是什么新内容，但是 Java 语言设计中的创新之一就是，它是第一个直接把跨平台线程模型和正规的内存模型集成到语言中的主流语言。核心类库包含一个 Th...

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