Java 9
| Status | End of Life |
|---|---|
| Release Date | 2017-09-21 |
| EOL Date | 2018-03-20 |
| Latest Version | 9.0.4 |
| Class File Version | 53.0 |
| Unicode Version | 8.0.0 |
| API Changes | Compare to 8 - 7 - 6 - 5 - 1.4 - 1.3 - 1.2 - 1.1 - 1.0 |
| Documentation | Release Notes, Language Spec, VM Spec, JavaDoc |
| SCM | git |
In quite an opinionated move Java got its own module system. While the original idea was to modularize the enormous JDK API itself the Java Platform Module System (JPMS) is now considered as the standard way to bundle any library.
The contents of Java 9 is specified in the umbrella JSR 379.
New Features
Here are all new features in Java 9 by category. There is also of list of all features of all Java releases.
Language
API
- HTTP/2 Client 1. Incubator (JEP 110)
- Var Handles (JEP 193)
- UTF-8 Property Resource Bundles (JEP 226)
- Compact Strings (JEP 254)
- Reactive Streams (JEP 266)
- Enhanced Deprecation (JEP 277)
- Object.finalize() deprecated (JDK-8165641)
Tools
- jshell (JEP 222)
- Multi-Release JAR Files (JEP 238)
- Compile for Older Platform Versions (JEP 247)
- jlink (JEP 282)
Internal
- Indify String Concatenation (JEP 280)
Should I Upgrade?
Java 9 is end-of-life since 2018-03-20. Unless you have a support contract for this version and a compelling reason to stay on the old version you should definitely upgrade to a newer version with active support.
Please consider upgrading to a current long term support LTS version Java 11, Java 17 or Java 21 to rely on a maintained platform and get advantage of the latest features and improvements.
Downloads
| Vendor | Product | License | Platform Downloads |
|---|---|---|---|
| AdoptOpenJDK | AdoptOpenJDK | GPLv2+CE | |
| Azul Systems | Zulu Builds of OpenJDK 9 | GPLv2+CE | |
| BellSoft | Liberica | GPLv2+CE | |
| Oracle | Oracle JDK 9 | Commercial | |
| Red Hat | Red Hat build of OpenJDK 9 | GPLv2+CE |
Sandbox
Instantly compile and run Java 9 snippets without a local Java installation.