Java 7: What's In It For Developers
GMGruman writes "After five years of a torturous political process and now under the new ownership of Oracle, Java SE 7 is finally out (and its initial bugs patched in the Update 1 release). So what does it actually offer? Paul Krill surveys the new capabilities that matter most for Java developers, from dynamic language support to an improved file system."
It's just improvements to the I/O API. Java has the New IO API for doing I/O. java 7 has extended it, hence NIO2. http://www.ibm.com/developerworks/java/library/j-nio2-1/?ca=drs-