There's a lot to learn about the technology and the open source project
Build Java itself!
- See Your own Environment then Adopt OpenJDK Build Instructions- Building OpenJDK on your machine
- See Adopt OpenJDK VM Build then Adopt OpenJDK Build Instructions - Building OpenJDK within a virtual machine
- Extra Code Tools - We're planning on integrating these with Betterrev
Improve the quality of Java!
- Test Fests - Hackdays focusing on improving the quality and quantity of OpenJDK tests.
- Testing Java - Co-ordinating projects to use early builds of Java 8/9
Betterrev - A new website and workflow to improve patch submission process for OpenJDK. Includes:
- Pull Request mechanism for patch submission
- Build Farm
- Continous Integration with JTreg regression tests
- Static code analysis
- Patch creation
- License checking
- Patch submission
- And more
Javacountdown - A JavaEE 6/7 and HTML 5 website to track global usage of Java in the Browser and encourage its demise.
- Tool that fixes a Javadoc security vulnerability - JavadocUpdaterTool
- Ux overhaul of the wiki pages
There are some General Instructions for Small Changes which apply to most of the sub projects below.
- Clean up javac warnings
- Coinification of the OpenJDK
- StringBuffer to StringBuilder replacements (where appropriate)
- Replace 0xff with calls to Byte.toUnsignedInt - TBA
- Apply enhanced-for loop (foreach) replacement of manual for loops - TBA
- Apply enums - TBA
- Apply covariant overrides - TBA
- Apply autoboxing - TBA
In order to get a patch ready for committing, you need to have written the patch, but there are several other things you need to do.First off, you should be comfortable with building OpenJDK & keeping up to date with the head of the relevant repo.You should also know (from having watched the mailing lists, or by asking on the Adopt OpenJDK mailing list) which project you should be targeting for your patch. Note that this may not necessarily be the OpenJDK 9 mainline project.You should also have installed jtreg as that will be needed for testing your patch.
There are two parts to this. Project Jigsaw itself and project Penrose, a splinter project investigating OSGi/Jigsaw interaction
- Jigsaw - TBA
- Project Penrose - Lead by Neil Bartlet
- Investigate the experimental patch by Lukas Stadler and get it up to date with OpenJDK 9 - Join co_jsrATsswDOTuni-linzDOTacDOTat for details
- Start discussions within mlvm-dev about coroutines, their state and their suitability going forward for the JVM
- Concurrency testing - lead by Venudhar Gogineni
Giving feedback, adding tutorials etc for the Java Microbenchmark framework
- Java Microbenchmark - lead by Helio
Read Alex Blewitt's blog post for some background information on the JEP process. Some JEPs can be classed as advanced level proposals:
Java 8 has now been released, here are the projects we ran to support it. You can still find useful tutorials and material there!
Java 8 will include Lambdas (aka closures), bringing functional programming capabilities to Java
- Lambda Tutorials - Hands on, test driven tutorials for Java 8
- Lambdas Hackday 1 and Lambdas Hackday 2 - Hackdays exploring Lambdas and the new Collections APIs
- Also, see JSR 335 at the Adopt a JSR program.
- For more details see the page on Nashorn
- Preparation for Tuples - TBA - Lead by Mike Barker
- Value Types - TBA - See John Rose's Value Types Blog Post
- Some rough goals are listed here: AdoptOpenJDKGoals
- Ux overhaul of the http://openjdk.java.net - This is delayed until an infrastructure move takes place.
- Triage OpenJDK Bugs - This is delayed until the public JIRA instance is available