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
Web Apps, SPA, PWA with vanilla Java Script (ES 6+), CSS 3 and WebStandards only. As simple as possible, but not simpler. See you at: (Progressive) Web apps, Single Page Apps and WebStandards airhacks workshops at MUC airport, Winter Edition
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