New Features and Enhancements in JDK 7

• The java.nio.file package and its related package, java.nio.file.attribute, provide comprehensive support for file I/O and for accessing the file system. See File I/O (featuring NIO 2.0) in the Java Tutorials
• Networking

• Sockets Direct Protocol (SDP) is a wire protocol developed to support stream connections over InfiniBand fabric. For more information, see Understanding the Sockets Direct Protocol a trail in the Java Tutorials.

• Closing a URL Classloader

• Java HotSpot Virtual Machine
  

• Compressed Oops in the Hotspot JVM

• Java HotSpot Virtual Machine Performance Enhancements

• Java Virtual Machine Suppport for Non-Java Languages

• Garbage-First Collector

• Supported Encodings

• Supported Locales

• Submitting a Bug Report and Available Support Options

• Copyright and License Terms for Documentation