(Alibaba's expert-level concurrent programming architect-level course, completing the course study can help students solve many difficult and miscellaneous problems in JAVA concurrent programming, and greatly improve the efficiency of JAVA concurrent programming. The course content includes JAVA handwritten thread pool, detailed explanation of UC thread pool API, detailed explanation of root cause of thread security, lock and atomic class, principle and implementation of distributed lock, concurrent programming-AQS and other highly targeted JAVA programming development tutorials. Very helpful for top-notch JAVA development skills.)