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1. InetAddress	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#1-inetaddress
2. URL	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#2-url
3. Sockets	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#3-sockets
4. Datagram	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#4-datagram
NIO	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#nio
1. 流与块	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#1-%E6%B5%81%E4%B8%8E%E5%9D%97
2. 通道与缓冲区	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#2-%E9%80%9A%E9%81%93%E4%B8%8E%E7%BC%93%E5%86%B2%E5%8C%BA
2.1 通道	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#21-%E9%80%9A%E9%81%93
2.2 缓冲区	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#22-%E7%BC%93%E5%86%B2%E5%8C%BA
3. 缓冲区状态变量	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#3-%E7%BC%93%E5%86%B2%E5%8C%BA%E7%8A%B6%E6%80%81%E5%8F%98%E9%87%8F
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5. 阻塞与非阻塞	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#5-%E9%98%BB%E5%A1%9E%E4%B8%8E%E9%9D%9E%E9%98%BB%E5%A1%9E
5.1 阻塞式 I/O	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#51-%E9%98%BB%E5%A1%9E%E5%BC%8F-io
5.2 非阻塞式 I/O	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#52-%E9%9D%9E%E9%98%BB%E5%A1%9E%E5%BC%8F-io
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6.1 ServerSocketChannel	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#61-serversocketchannel
6.2 Selectors	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#62-selectors
6.3 主循环	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#63-%E4%B8%BB%E5%BE%AA%E7%8E%AF
6.4 监听新连接	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#64-%E7%9B%91%E5%90%AC%E6%96%B0%E8%BF%9E%E6%8E%A5
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6.7 传入的 I/O	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#67-%E4%BC%A0%E5%85%A5%E7%9A%84-io
参考资料	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#%E5%8F%82%E8%80%83%E8%B5%84%E6%96%99
	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#概览
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	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#6-套接字实例
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	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#62-selectors
	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#63-主循环
	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#64-监听新连接
	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#65-接受新的连接
	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#66-删除处理过的-selectionkey
	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#67-传入的-io
	https://github.com/XGCoder/InterviewNotes/blob/master/notes/Java IO.md#参考资料
IBM: NIO 入门	https://www.ibm.com/developerworks/cn/education/java/j-nio/j-nio.html
深入分析 Java I/O 的工作机制	https://www.ibm.com/developerworks/cn/java/j-lo-javaio/index.html
NIO 与传统 IO 的区别	http://blog.csdn.net/shimiso/article/details/24990499
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