(This course explains the JUC concurrency Library in depth. Through the analysis of openjdk and assembly source code, it has laid a solid foundation for the practice of high concurrency program development. Including all Java lock + JMM + volatile + CAS + AQS + all atom operation class + ThreadLocal + synchronous lock upgrade + stampedlock + concurrency comprehensive actual combat completable future, etc. from use to principle and source code, we will deeply explain the common knowledge analysis of concurrency, help you fully master the high concurrency knowledge system and provide detailed solutions for future development work.)