Java多线程问题

https://stackoverflow.com/questions/2779484/why-must-wait-always-be-in-synchronized-block#

https://stackoverflow.com/questions/8774332/whats-the-difference-in-using-reentrentlock-and-synchronizedobject

https://stackoverflow.com/questions/3786825/volatile-boolean-vs-atomicboolean

Java内存模型

https://blog.csdn.net/javazejian/article/details/72772461

 https://blog.csdn.net/suifeng3051/article/details/52611310

part 3

http://www.importnew.com/3146.html

《成为JavaGC专家Part I — 深入浅出Java垃圾回收机制》

《成为JavaGC专家Part II — 如何监控Java垃圾回收机制》

 jmap 原理

http://lovestblog.cn/blog/2014/06/18/jvm-attach/ 

https://blog.csdn.net/raintungli/article/details/7034005

sa实现机制

https://m.aliyun.com/yunqi/articles/20231

设计原则

https://www.cnblogs.com/dolphin0520/p/3919839.html

 

Java集合的结构

https://www.slideshare.net/cnbailey/memory-efficient-java

 

java 中的锁 -- 偏向锁、轻量级锁、自旋锁、重量级锁

https://blog.csdn.net/zqz_zqz/article/details/70233767

 

 A Strong reference,Soft reference,Weak reference,Phantom reference

https://stackoverflow.com/questions/299659/whats-the-difference-between-softreference-and-weakreference-in-java

 

Tiered Compilation

https://stackoverflow.com/questions/35601841/how-does-the-jvm-decided-to-jit-compile-a-method-categorize-a-method-as-hot

https://stackoverflow.com/questions/38721235/what-exactly-does-xx-tieredcompilation-do?noredirect=1&lq=1

 

https://stackoverflow.com/questions/2889777/difference-between-hashmap-linkedhashmap-and-treemap

https://stackoverflow.com/questions/40471/differences-between-hashmap-and-hashtable

https://stackoverflow.com/questions/355089/difference-between-stringbuilder-and-stringbuffer

https://stackoverflow.com/questions/20116660/hashset-vs-treeset-vs-linkedhashset-on-basis-of-adding-duplicate-value

https://javaconceptoftheday.com/hashset-vs-linkedhashset-vs-treeset-in-java/

 

Tcpip

为什么需要三次握手，四次挥手

https://blog.csdn.net/qq_32444825/article/details/82584824

HBase 

https://mapr.com/blog/in-depth-look-hbase-architecture/

 

 

JVM

对象系统，对象布局

JVM里的符号引用如何存储？ - RednaxelaFX 的回答 - 知乎

JVM符号引用转换直接引用的过程? - RednaxelaFX 的回答 - 知乎