A quick introduction about everything that's new in Java 11. Includes API changes, language changes and new tools in the JDK. Demo's for this presentation can be found here: https://github.com/MichelSchudel/java11demo

1. Java 11
IS HERE TO STAY

2. The Java roadmap

3. Weblogic support for Java 11

4. Java 9 and 10 recap
 Module system (project JigSaw)
 Jshell (REPL for Java)
 Local variable type inference (var parameters)
 API changes

6. Under-the-hood stuff
 JEP 309: Dynamic class-file constants
 JEP 315: Improve Aarch64 intrinsics
 JEP 331: low overhead heap profiling
 JEP 333: ZGC: A Scalable low latency garbage collector
 JEP 329: ChaCha20 and Poly1305 cryptographic algoritms (replacement for
RC4)
 JEP 336: Deprecate Pack2000 and API
 JEP 335: Deprecate Nashhorn JS engine
 JEP 327: Upgrade to unicode 10
 TLS 1.3 support

7. Language, API & Tools changes
 Local variable-syntax for lamba parameters (demo)
 API changes (demo)
 Remove JavaEE (and CORBA, but who cares?) (demo)
 Http client & websocket client (demo)
 Flight recorder
 Launch single-file Source-code programs
All demo’s are here: https://github.com/MichelSchudel/java11demo

8. Local variable type inference for lamba
parameters
 Bring lamba parameters more in line with
expectations from other variable declarations
 Useful for adding annotations

9. API changes
 String enhancements
 Path factory methods
 File string methods

10. Remove corba and JavaEE modules
 java.xml.ws (JAX-WS, plus the related technologies SAAJ and Web
Services Metadata)
 java.xml.bind (JAXB)
 java.activation (JAF)
 java.xml.ws.annotation (Common Annotations)
 java.corba (CORBA)
 java.transaction (JTA)

11. HttpClient and WebSocket client
 Package java.http.net
 Support for sync and sync communication
 Fluent API

12. Flight Recorder
 Built for monitoring, profiling and troubleshooting Java applications,
consists of:
 JMX Console for monitoring JVM in real time
 Java Flight Recorder for collecting data
 Optional tools via plugins
 At most 1% performance overhead out-of-the-box
 No performance overhead when not activated
 Java Mission Control is now open source and not part of the JDK
java -XX:StartFlightRecording=settings=default myClass

13. Lauch single file source code programs
 Useful for learning Java and executing small single-file programs
 Single-file programs only!
 Arguments supported
 Single files only (but nested classes are supported)
java MultiplierProgram.java 2
> 2 * 2 = 4

14. Summary
 Java 11 is here to stay! (LTS)
 Some nice tools & API changes
 Weblogic support nowhere to be found…