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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...

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