Real World Java 9

Explore the practical applications and key features of Java 9 in this comprehensive 1-hour 17-minute presentation by Trisha Gee from JetBrains. Dive into live coding demonstrations showcasing the Java Platform Module System, Reactive Programming with the Flow API, improvements to the Streams API for handling infinite streams, and simplified code using Collections convenience methods. Discover additional enhancements such as interface updates, deprecation changes, and tools like JShell. Learn how to leverage these new features to improve your Java development process, from modularizing existing applications to utilizing reactive programming techniques and streamlining code with updated APIs.

Why Java 9?
The Case Study
Compiling with Java 9
Underscore as an identifier no longer valid
Encapsulate Most Internal APIs
9:07 Jigsaw screen freezes here until , but it's mostly talking anyway
Java Platform Module System
module-info.java and live coding using JPMS in an existing application
Automatic modules
Using my custom modules
A more complex module-info.java example
Disadvantages of applying JPMS to existing code
Advantages of JPMS
Reactive Streams API
Questions the answers are also covered below.
Module diagrams in IntelliJ IDEA
Convenience Factory Methods for Collections
Private Methods on Interfaces
New Methods on the Streams API
New Methods on Optional
The Stack Walking API
Process API Updates
Multi Release JAR Files
Updated Deprecation
HTML 5 Javadoc & Javadoc Search
JShell & Support in IntelliJ IDEA
Summary