• Java 9 Module
• 5 Features in Java 9 that WILL Change How You Develop Software (and 2 That Won’t) | Java Code Geeks
• Ultimate Guide To Java 9

• Java9 특징 훑어보기
• Java 9의 변화와 특징 대충 정리 – 디지털 세상을 만드는 아날로거 – Medium
• Java 9 Module System
• Java 9 Features
• Java 9 JShell
• Java 9 New Features | Baeldung
• Java 9 New Features Tutorial | Examples Java Code Geeks - 2017
• Inside Java 9 - Part I
• Java 9's other new enhancements, Part 1: Factory methods in Java Collections | JavaWorld
• Java 9's other new enhancements, Part 2: Milling Project Coin | JavaWorld
• Java 9 Process API Improvements | Baeldung
• Java 9 - Exploring the REPL | Baeldung
• Stephen Colebourne's blog: Java Time (JSR-310) enhancements in Java SE 9
• Deep Dive into Java 9's Stack-Walking API — SitePoint
• Stephen Colebourne's blog: Java 9 modules - JPMS basics
• What's New in Java 9? (Besides Modules) - DZone Java
• JDK9: Execute Java Code Like Unix Shell Script
• Java 9 Migration Guide: The Seven Most Common Challenges
• Everything You Need to Know About Java 9 | Takipi Blog
• Java 9 | Expert Insights | Oracle
• Java Platform, Standard Edition Oracle JDK 9 Migration Guide, Release 9
• My Top Java 9 Features - DZone Java
• Java 9: Process API got a new boost!
• Java 9: Enhancements to Optional
• Java 9: Enhancements to the Stream API
• Java 9: JShell
• Infinite Sets in Java 9 | Java Code Geeks - 2018
• Java 9 Platform Logging API | Baeldung
• Java 9 Stream API improvements | Baeldung
• Java 9 | Baeldung
• Java 9 Optional API Additions | Baeldung
• JDK9's ForkJoinPool Upgrades - DZone Java
• Java 9 Reactive Streams | Baeldung
• Reactive Streams in Java 9 - DZone Java
• Java 9 Reactive Streams - JournalDev
• Reactive Programming with JDK 9 Flow API | Oracle Community
• Don’t use Reactive Streams in Java 9+ - Jacek Kunicki - YouTube
• Reactive Programming with Java 9 Flow - The Practical Developer
• Reactive Streams example - Java 9
• Compact Strings in Java 9 | Baeldung
• Compact Strings in Java 9 - DZone Java
• Inspired by Actual Events: Java 9
• How Java 9 And Project Jigsaw May Break Your Code | Java Code Geeks - 2019
• Exploring the New HTTP Client in Java 9
• Introduction to the Java HTTP Client
• HTTP Client in Java 9 | Java Development Journal
• Java 9: HTTP/2 Improvements - DZone Java
• JAVA8말고 JAVA9를 사용해볼까 | Ahea Team Study Blog
• Java 9 Features and Enhancements - HowToDoInJava
• Stephen Colebourne's blog: Java Time (JSR-310) enhancements in Java SE 9
• Java 9 Convenience Factory Methods for Collections | Baeldung
• Java 9 CompletableFuture API Improvements | Baeldung
• Java 9 CompletableFuture API Improvements - Delay and Timeout Support » grokonez
• CompletableFuture Improvements - Java 9 Improvements
• CompletableFuture API Improvements - Tutorialspoint

Java 에서 문자열을 연결할 때는 StringBuilder 를 사용해야 한다 → JDK 9 부터는 그냥 + 연산으로 연결하는게 제일 빠르다.
“+ is no longer compiled to StringBuilder.” In their “Lessons from Today” slide, they state, “Use + instead of StringBuilder where possible” and “recompile classes for Java 9+.”

• Inspired by Actual Events: JDK 9/JEP 280: String Concatenations Will Never Be the Same
• https://www.javaspecialists.eu/talks/pdfs/2018%20Voxxed%20in%20Thessaloniki,%20Greece%20-%20%22Enough%20java.lang.String%20to%20Hang%20Ourselves%20...%22%20by%20Heinz%20Kabutz.pdf

• Concatenating Strings in Java 9 - DZone Java

• Internationalization Enhancements in JDK 9
• 기본적으로 UTF-8로 ResourceBundle에서 *.properties 파일을 로딩함.
• 만약 인위적으로 기존 ISO-8859-1로 명시하고자 한다면
• PropertyResourceBundle (Java SE 9 & JDK 9 )

java.util.PropertyResourceBundle.encoding=ISO-8859-1

• Properties 는 기본 ISO-8859-1 이고, 명시적으로 Reader 인코딩을 UTF-8로 지정해야만 한다.