Add this URL to your Eclipse Installation to reach this solution's update site.
Java™ 9 support has not yet landed in our standard download packages. But you can add an early access preview to your existing Eclipse Oxygen (4.7) install.
The Eclipse Java™ 9 Support (BETA) contains the following:
If this does not seem to have an effect, the project should be closed and reopened, as a workaround. Once it is done, the entry Module Source Path should appear as a child in the Package Explorer and projects referenced in the module-info should be visible under the Module Source Path just like they do under the Referenced Libraries entry.
This is an implementation of an early-draft specification developed under the Java Community Process (JCP) and is made available for testing and evaluation purposes only. The code is not compatible with any specification of the JCP.
Unsuccessful Installs in the last 7 Days: 10
By adding the following code below to your website you will be able to add an install button for Java 9 Support (BETA) for Oxygen.HTML Code:
Submitted by Richard Evans on Thu, 2017-01-12 15:05
I've added Java 9 support to Eclipse 4.7M4 and I'm trying it with some existing code. One class has an illegal import from a sun. package. This is not shown as an error in the editor, just a marker.
Submitted by Dani Megert on Tue, 2017-01-17 10:12
Please don't report bugs here. Instead file a bug report against JDT Core with steps to reproduce.
Submitted by Dani Megert on Mon, 2017-01-16 09:54
I'm not sure what you mean. Markers are used to show errors and warnings. Please file a bug report against JDT Core with an example.
Submitted by Richard Evans on Mon, 2017-01-16 14:21
The import is:
and the imported is used later on in the code. Neither location is flagged as an error.
Submitted by Dani Megert on Tue, 2017-01-17 10:13
Submitted by Chris Hennick on Fri, 2017-01-13 15:18
If your sun.* classes are in the following list, they can still be used -- just write a modupe-info.java in your source root and make sure your module declares "requires jdk.unsupported;" sun.misc.Unsafe, sun.misc.Signal, sun.misc.SignalHandler, and sun.reflect.ReflectionFactory.
Submitted by Chris Hennick on Wed, 2017-01-11 01:43
My project contains multiple modules, and I'm getting this error:
Description Resource Path Location Type
The project was not built due to "Build path contains duplicate entry: 'module-info.java' for project 'Sunset'". Fix the problem, then try refreshing this project and building it since it may be inconsistent Sunset Unknown Java Problem
How do I fix this?
Submitted by Jay Arthanareeswaran on Wed, 2017-01-11 10:38
Or join the discussion on https://bugs.eclipse.org/bugs/show_bug.cgi?id=479483
Submitted by Dani Megert on Wed, 2017-01-11 10:26
Currently one project corresponds to one module. You have to refactor it into multiple projects. If you disagree with that, please open a bug report against JDT Core.
Submitted by Chris Hennick on Wed, 2017-01-11 16:02
Thanks! Creating a new project for each module seems to have fixed that error message. (It'd be nice if there was a way to automatically create a project for every subfolder of a given folder, and make them all into a new working set.) But now, I'm getting this error once per project:
Description Resource Path Location Type
The project was not built since its build path is incomplete. Cannot find the class file for java.lang.Object. Fix the build path then try building this project sunset.classloader Unknown Java Problem
The error persists even after manually applying the org.eclipse.jdt.MODULE_PATH workaround, restarting Eclipse and cleaning all the projects. What's wrong now?
Submitted by Dani Megert on Mon, 2017-01-16 09:52
I can't tell from here what's wrong. Please file a bug report against JDT Core with an example project.
Submitted by Eric Kolotyluk on Fri, 2016-12-23 17:16
When launching Eclipse, after choosing the workspace I get
An error has occurred
See the log file /Users/eric/documents/workspace/.metadata/.log
I appended the following to the config.ini file
but I still get the same error
!ENTRY org.eclipse.osgi 4 0 2016-12-23 14:14:47.551
!MESSAGE Application error
org.eclipse.e4.core.di.InjectionException: java.lang.NoClassDefFoundError: javax/annotation/PostConstruct
Submitted by Dani Megert on Tue, 2017-01-03 11:38
-addmods was used by older Java 9 versions. These days you have to use --add-modules=java.se.ee as explained above.
Submitted by Eric Kolotyluk on Tue, 2017-01-24 15:10
I have added modules=java.se.ee as explained above, and the effect is still the same: An error has occurred, see the log file.
The only way I can get Oxygen to launch is to add this to the Shortcut Properties in Windows.
Submitted by Dani Megert on Wed, 2017-01-25 10:34
> I have added modules=java.se.ee as explained above
Nothing above says that this is what you need to do. You need to add --add-modules=java.se.ee (assuming you are using a recent Java 9 version).
Submitted by Manoj Palat on Wed, 2016-12-21 08:21
With the latest as of now: http://download.eclipse.org/eclipse/updates/4.7-P-builds/P20161221-0730/
Ref https://bugs.eclipse.org/bugs/show_bug.cgi?id=509354 for details.
Submitted by Anonymous on Fri, 2016-12-16 06:04
I'm on Mac OS, Fresh Install of Neon + http://download.eclipse.org/eclipse/updates/4.6-P-builds/.
First as already noted by some bug, Eclipse neon.1 (4.6.1) does not start under JDK-9. So the only way to start it is via :
Now it starts.
Things I am looking at :
Eclipse -> About Eclipse -> Installation Details -> Eclipse JDT Patch with Java 9 is installed.
Eclipse -> Preferences -> Java Compiler -> No option for JDK-9.
Fresh install of Eclipse Oxygen. It starts with JDK-9 with default configuration.
Things I am looking at :
Eclipse -> Preferences -> Java -> Compiler -> 9 (BETA) is there. I select it.
Eclipse -> Preferences -> Java -> Installed JRE's -> Installed JRE Location no longer Exists. JRE will be removed.
Again, it does not work.
Can anyone provide any details on how this is supposed to be configured?
Submitted by Dani Megert on Wed, 2016-12-21 11:37
Sorry for any inconvenience. Java 9 is still moving and the latest Java build 149 had breaking changes (new keywords and new class file format. We have uploaded a new feature patch that solves that issue. Please give it a try!
Submitted by Manoj Palat on Wed, 2016-12-21 05:35
please note that this is https://bugs.eclipse.org/bugs/show_bug.cgi?id=509354
Submitted by Markus Keller on Tue, 2016-06-07 13:03
The update site http://download.eclipse.org/eclipse/updates/4.6-P-builds/ now works with Neon (4.6) RC4 and later builds.
Submitted by Matthias Zimmermann on Fri, 2016-05-06 03:58
I did not manage to add Java9 support to the Eclipse Scout M7 EPP via Marketplace (as described above) or via P2 update site http://download.eclipse.org/eclipse/updates/4.6-P-builds/
* org.eclipse.equinox.p2.core.ProvisionException: Unable to read repository at http://download.eclipse.org/eclipse/updates/4.6-P-builds.
* No repository found at http://download.eclipse.org/eclipse/updates/4.6-P-builds/P20160308-1615.
Submitted by Ueli Hofstetter on Thu, 2015-08-13 13:09
i am getting errors when i try to compile a simple hello world program. described the problem on stackoverflow
search for eclipse-mars-support-for-java9-build-path-settings
Submitted by Mario Hernandez on Thu, 2015-07-16 10:29
good morning to all
Try to fill your new ide to test the Java version 9, but was useless.
Will not let me create a class of any kind.
I get the error provider "jrt" not found
It is that the JDK version 9 because there is no jre.
As you work on this version of Eclipse projects.
Thank you very much for your time and dedication.
Submitted by Jay Arthanareeswaran on Tue, 2015-07-21 06:10
Eclipse Mars does not include support for Java 9. That's where this update (Eclipse Java™ 9 Support (BETA) for Mars) is needed. Please update this on top of existing Mars update, that should help. Also please make sure you run the IDE with JRE 9, which provides the JRT implementation.
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