Update README.md

Snailclimb · web-flow · commit ac8281c70eb0 · 2019-03-05T16:54:13.000+08:00
diff --git a/README.md b/README.md
@@ -48,6 +48,7 @@
 ## 待办
 
 * [ ] Java 8 新特性总结
+* [ ] Java 多线程类别知识重构
 * [x] BIO,NIO,AIO 总结 
 * [ ] Netty 总结
 * [ ] 数据结构总结重构
