jvm的基本原理,分为几块
https://www.cnblogs.com/dingyingsi/p/3760447.html
事务有几个等级
https://blog.csdn.net/liwenxia626/article/details/79012051
字节码文件编译引擎
https://blog.csdn.net/u013678930/article/details/51980460
equals和hash码
https://www.cnblogs.com/zyj-bozhou/p/6733309.html
缓存查看、释放
https://www.cnblogs.com/wean/archive/2012/05/16/2502724.html
一级缓存二级缓存
https://www.cnblogs.com/fengli9998/p/6180433.html
B-tree
https://www.cnblogs.com/gym333/p/6877023.html
HashMap和HashTabel的底层