java接口

http://www.runoob.com/java/java-interfaces.html

http://blog.csdn.net/wei_zhi/article/details/52738471

http://blog.csdn.net/liujun13579/article/details/7736116/

http://www.cnblogs.com/dolphin0520/p/3811437.html

https://baike.baidu.com/item/java%E6%8E%A5%E5%8F%A3/4939170?fr=aladdin

https://www.zhihu.com/question/20111251

http://www.cnblogs.com/mnzero/p/4625792.html

http://www.weixueyuan.net/view/6009.html

http://www.cnblogs.com/claricre/p/6237335.html

http://www.cnblogs.com/claricre/p/6237335.html