Adam Bien's Weblog
Java SE 8 Language (and VM) Specification with The Diff To Java SE 7
Recent (Java 8 through Java 5) Java language specifications are available for download: http://docs.oracle.com/javase/specs/.
Interestingly there is also a PDF document with highlighted diffs to Java SE 7: http://docs.oracle.com/javase/specs/jls/se8/jls8-diffs.pdf
NEW workshop: Build a Java EE 7 / Java 8 Application from Scratch, May 11th, 2015, Airport Munich