java9

Version 9 - 2017-09

• 🔗 Java 9 Documentation
• 🔗 Java 9 Javadoc

Java Modules

• Java 9 Modularity book

jlink [JEP 282]

Assembles and optimizes a set of modules and their dependencies into a custom runtime image

Ahead of time compilation - jaotc - [JEP 295]

• based on the graal compiler

REPL - jshell [JEP 222]

• 🔗 javaspecialists newsletter 250 - Learning Java with jshell
• jshell < echoserver.jsh (echoserver.jsh)- demo which starts an echo telnet server. After being started it can be tested by telnet 8080 where it will echo any character back.

Concurrency updates - support for reactive streams [JEP 266]

• 🔗 Reactive Streams

java.io API changes

• InputStream.transferTo(OutputStream) - transfer everything directly from an InputStream to an OutputStream.

XML Catalog [JEP 268]

• TODO

Compact strings [JEP 254]

• TODO

Milling project coin [JEP 213]

• Support for private methods in interfaces

Garbage Collectors

HotSpot Virtual Machine Garbage Collection Tuning Guide, release 9 pdf (🔗 original link)

The G1 (Garbage-First Garbage Collector) set as default