java.util.concurrent java并发包中部分工具的使用

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• java.util.concurrent.Semaphore(信号量）

https://www.cnblogs.com/nullzx/p/5270233.html

https://my.oschina.net/cloudcoder/blog/362974

 

• java.util.concurrent.CopyOnWriteArrayList（）

https://www.cnblogs.com/dolphin0520/p/3938914.html

http://ifeve.com/java-copy-on-write/

https://blog.csdn.net/imzoer/article/details/9751591