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
See you at Java EE Workshops at MUC Airport or on demand and in a location very near you: airhacks.io!
NEW MUC Airport Workshop: Migrating Java Client (Swing / Java FX) to Web Standards
Airport MUC workshops: Web (SPA, PWAs, Offline, Desktop, Mobile) Applications Essentials and Effective Web Applications. No migrations. #usetheplatform
Podcast: airhacks.fm and newsletter: airhacks.news
A book about rethinking Java EE Patterns