url

https://m.java8.com/thread-11569-1-1.html

https://time.geekbang.org/course/detail/237-154691

https://www.youtube.com/watch?v=03_AU3gF1Kw

https://www.cnblogs.com/binarylei/p/10117436.html

https://book.douban.com/review/14070887/

https://www.youtube.com/watch?v=fLMVjMGAxSE

https://www.youtube.com/watch?v=t-kOwCmtcmA