url日常

1.java代码分享，深度开源

https://www.open-open.com/code/?sort=active&lang=1&catalog=0

2.并发编程网

http://ifeve.com/

3.蚂蚁金服面试

https://mp.weixin.qq.com/s/-MzmdxqukOZ6rUta9nkGGw

4.跳动、腾讯面试后台

https://juejin.im/post/5cf7ea91e51d4576bc1a0dc2

5.java8常用新特性总结

https://juejin.im/post/5cd97ccb518825686b1209ea