Pro Java 7 NIO.2 addresses the three primary elements that offer new input/output (I/O) APIs in Java 7, giving you the skills to write robust, scalable Java
An extensive file I/O API system addresses feature requests that developers have sought since the inception of the JDK A socket channel API addresses multicasting, socket binding associated with channels, and related issues An asynchronous I/O API enables mapping to I/O facilities, completion ports, and various I/O event port mechanisms to enhance scalability NIO.2 for the Java platform, known as JSR 203, is a major feature of the new Java JDK 7 under the leadership of Alan Bateman as an OpenJDK project. Take advantage of these exciting new developments with Pro Java 7 NIO.2.
This books covers the new features in Java NIO added as part of Java7. There are detailed examples for the features added and is good reference book to brush through the new features.
nio.2 api introduction, the book describe nio api for some examples,if you want to know api how to use generally,read it. but the book not describe nio principle and mechnism.