Update README.md

EZLippi · EZLippi · commit db9a4c7b0eca · 2016-04-02T18:07:46.000+08:00
diff --git a/README.md b/README.md
@@ -253,6 +253,7 @@
 * [Java入门教程](https://github.com/LippiOuYang/practical-computer-skills/blob/master/src/java-string.md)
 * [javarevisited博客](http://javarevisited.blogspot.com/)
 * [journaldev教程](http://www.journaldev.com/)
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 ### Android
