Executor,CountDownLatch,Future,CyclicBarrier,Phaser,Exchanger
线程可见volatile,线程隔离ThreadLocal,
解决并发业务冲突,加锁 同步锁synchronized
解决单例重复问题,双重检测锁
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Executor,CountDownLatch,Future,CyclicBarrier,Phaser,Exchanger
线程可见volatile,线程隔离ThreadLocal,
解决并发业务冲突,加锁 同步锁synchronized
解决单例重复问题,双重检测锁
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