jvm

篇幅不大多看几遍

https://juejin.im/post/5cef8d415188254e625e13ca                   1

https://halo.sherlocky.com/archives/java-xin-sheng-dai-lao-nian-dai/  2

https://www.jianshu.com/p/6ecad1087c75                                3.1

http://blog.sina.com.cn/s/blog_df8f23a60102xa74.html            3.2