Java 9 in one slide New Version Scheme (semver 9.0.0) Language – Milling Project Coin – val/var ? – Enhanced deprecation JShell Javadoc (HTML5 doclet + search) VM – G1 enable by default + interned string in CDS – Compact String – Indify string concatenation – Enhanced java.lang.invoke API Jigsaw – modular JDK, encapsulate internal APIs, packaging, jlink, etc... JDK API – Factory method for collections (List.of(), Set.of(), Map.of()/ofEntries()) – Support HTTP 2 / WebSocket – VarHandle + java.util.concurrent enhancement – Stack Walking