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Update AQS原理以及AQS同步组件总结.md

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docs/java/multi-thread/AQS原理以及AQS同步组件总结.md
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@ -292,7 +292,7 @@ public class SemaphoreExample1 {
```java ```java
semaphore.acquire(5);// 获取5个许可，所以可运行线程数量为20/5=4 semaphore.acquire(5);// 获取5个许可，所以可运行线程数量为20/5=4
test(threadnum); test(threadnum);
semaphore.release(5);// 获取5个许可，所以可运行线程数量为20/5=4 semaphore.release(5);// 释放5个许可
``` ```
除了 `acquire`方法之外，另一个比较常用的与之对应的方法是`tryAcquire`方法，该方法如果获取不到许可就立即返回 false。 除了 `acquire`方法之外，另一个比较常用的与之对应的方法是`tryAcquire`方法，该方法如果获取不到许可就立即返回 false。