CountDownLatch原理

回答: CountDownLatch是一个通用的同步工具，它可以用于许多用途。它的原理是通过一个计数值来控制线程的执行顺序和同步。当一个CountDownLatch被初始化为一个正整数N时，它会在某个线程执行countDown方法时将计数值减1，其他线程可以调用await方法来等待计数值变为0。当计数值为0时，await方法将返回，线程可以继续执行。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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