1. Java中的多线程
http://blog.csdn.net/luoweifu/article/details/46673975
Java中继承thread类与实现Runnable接口的区别
http://mars914.iteye.com/blog/1508429
Callable 和 Future
http://www.cnblogs.com/dolphin0520/p/3949310.html
synchronized
http://blog.csdn.net/luoweifu/article/details/46613015
2. 反射
http://www.cyqdata.com/android/article-detail-36281
3. 强引用, 软引用, 弱引用, 虚引用
https://my.oschina.net/ydsakyclguozi/blog/404389
4. 多线程
Thread和Runnable的区别
http://mars914.iteye.com/blog/1508429
5. 泛型
java 泛型中 T 和 问号（通配符）的区别