note

10本必读书：https://javarevisited.blogspot.com/2018/06/10-all-time-great-books-for-java.html 知识收集：https://github.com/crossoverJie/JCSprout

多线程编程：https://www.tutorialdocs.com/article/java-inter-thread-communication.html

java的null设计错误：https://medium.com/@elizarov/null-is-your-friend-not-a-mistake-b63ff1751dd5