Java

《Effective Java》

https://www.jianshu.com/c/ce8cf0e13b23
https://www.jianshu.com/c/8b2063ad5b8c

《On Java 8》

https://lingcoder.github.io/OnJava8/#/sidebar
https://github.com/LingCoder/OnJava8
https://wizardforcel.gitbooks.io/onjava8/content/Introduction.html

Java设计模式

https://juejin.im/post/5b06bf2df265da0de2574ee1

https://mp.weixin.qq.com/s?__biz=MzI4Njg5MDA5NA==&mid=2247484222&idx=1&sn=5191aca33f7b331adaef11c5e07df468&chksm=ebd7423fdca0cb29cdc59b4c79afcda9a44b9206806d2212a1b807c9f5879674934c37c250a1#rd

Scala

《Scala编程》
《Scala编程思想》
Twitter Scala School
Effctive Scala
Implicit 详解
《Scala Cookbook》
http://scalacookbook.com/