JDK 7 has some major focus areas for its upcoming release, such as Project Coint (Small languages changes for the JDK) and the possible inclusion of closures, among other things. But as this post points out, already in its latest beta release, JDK 7 offers speed enhancements over its predecessor in areas related to array and arithmetic processing. Read the entire post 'JDK 7 Twice as Fast* as JDK 6 for Arrays and Arithmetic': http://lingpipe-blog.com/2009/03/30/jdk-7-twice-as-fast-as-jdk-6-for-arrays-and-arithmetic/