The document summarizes new features and changes in Java 10 and previews Java 11. It discusses local variable type inference, improvements to the garbage collector interface, application class data sharing, an experimental Java-based JIT compiler using Graal and Truffle, and the removal of certain Java EE and CORBA modules and tools in Java 11.

1. Java chapter
4.04.2018

2. Java 10
available

3. Java 10 compiler bug

4. JEP 286: Local-Variable Type Inference.
var list = new ArrayList<String>(); // infers
ArrayList<String>
var stream = list.stream(); // infers
Stream<String>

5. JEP 304:
Garbage-Collect
or Interface.

6. JEP 310: Application Class-Data Sharing.
java -Xshare:dump -XX:+UseAppCDS
-XX:SharedClassListFile=hello.lst
-XX:SharedArchiveFile=hello.jsa -cp hello.jar
java -Xshare:on -XX:+UseAppCDS
-XX:SharedArchiveFile=hello.jsa -cp hello.jar HelloWorld

7. JEP 317:
Experimental
Java-Based JIT
Compiler.

8. Graal & Truffle

9. Truffle -
Language
Implementation
Framework

10. Truffle Approach

11. What is JIT

12. Mode Execution

13. Graal

14. Key Features
● Multi-language compilator.
● Start in just-in-time и ahead-of-time mode.
● Mature optimization
○ Example: Partial Escape Analysis.
● Written in Java to lower the entry barrier

15. Enable Graal
-XX:+UnlockExperimentalVMOptions
-XX:+UseJVMCICompiler
-XX:-EnableJVMCI

16. Pitfalls
● Warmup time
● Memory consumption
● Old version on Java 9

17. Java 11 is
coming

18. JEP 318: Epsilon.
An Arbitrarily
Low-Overhead
Garbage
Collector

19. JEP 320: Remove the Java EE and
CORBA Modules
JEP 320 lists several modules and tools that it will remove. The to-be-removed
modules include java.xml.ws, java.xml.ws.annotation, jdk.xml.ws, java.xml.bind,
jdk.xml.bind, java.transaction, java.corba. The to-be-removed tools include wsgen,
wsimport, schemagen, xjc, and servertool.

20. Thanks!
Sergii Volkodav