viberring's interview prepare
https://www.zhihu.com/question/60949531
https://juejin.im/post/5dc2c2a96fb9a04a937836f4
https://www.jianshu.com/p/cf431b1544fc
https://zhuanlan.zhihu.com/p/114539037
https://blog.csdn.net/a724888/article/details/81389605
https://github.com/AobingJava/JavaFamily
https://github.com/kdn251/interviews/blob/master/README-zh-cn.md
https://github.com/CyC2018/CS-Notes
https://github.com/doocs/advanced-java
https://github.com/crossoverJie/JCSprout
https://github.com/aalansehaiyang/technology-talk
https://github.com/frank-lam/fullstack-tutorial
http://greggordon.org/java/tij4/solutions.htm https://lingcoder.github.io/OnJava8/#/