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深入剖析线程同步工具CountDownLatch原理-wx5c6bcb1723ec5的博客
source link: https://blog.51cto.com/14207399/2415502
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0CountDownLatch的作用CountDownLatch作为一个多线程间的同步工具，它允许一个或多个线程等待其他线程（可以是多个）完成工作后，再恢复执行。就像下面这样：1从一个Demo说起我们直接拿源码中给出的Demo看一下，源码中的这个demo可以看做模拟一个赛跑的场景。赛跑肯定有跑得快的运动员也有跑的慢的运动员，每个运动员就表示一个线程。运动员听到枪声后开始起跑，而最后一个运动员到达终
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