JDK 9 images are now modular with JDK 9 Early Access build 41

[Ivan St. Ivanov]

Hi Ben,

IMHO it is NetBeans (and eventually all the IDEs) that have to adapt to the
new features of the JDK: the MaxPermSize and the rt.jar removal.

Cheers,
Ivan

On Tue, Dec 9, 2014 at 1:50 PM, Rory O'Donnell <rory.odonnell at oracle.com>
wrote:

> Hi Ben,
>
> If you are still having these issues with b41, can you post your finding
> in the jigsaw-dev
> mailng list ?
>
> Thanks,Rory
>
> On 09/12/2014 11:48, Ben Evans wrote:
>
>> Hi,
>>
>> I've been working with JDK 9 EA b40. Here are my notes (all of this is
>> on Mac OS Mavericks 10.9.5).
>>
>> Rory, can you confirm if any of this has been fixed in b41?
>> Particularly the overwriting of settings, as this one is basically a
>> showstopper for running hack days involving Mac users IMO.
>>
>> 1) Upgrade via .dmg overwrote all Java settings, rather than adding.
>> This basically broke every installed Java app on my system.
>>    - How to undo? There's no obvious way.
>>    - For users who have multiple Java versions installed, this slash &
>> burn approach is not good.
>>
>> For reference, here's how I have my machines configured:
>>
>> boxcat$ ls -l /Library/Java/JavaVirtualMachines/
>> total 24
>> lrwxr-xr-x  1 root  wheel   15 24 Nov 22:31 java7 -> jdk1.7.0_71.jdk
>> lrwxr-xr-x  1 root  wheel   15 14 Nov 22:03 java8 -> jdk1.8.0_25.jdk
>> lrwxr-xr-x  1 root  wheel   12  4 Dec 16:03 java9 -> jdk1.9.0.jdk
>> drwxr-xr-x  3 root  wheel  102 14 Nov 20:24 jdk1.7.0_71.jdk
>> drwxr-xr-x  4 root  wheel  136 14 Nov 22:03 jdk1.8.0_05.jdk
>> drwxr-xr-x  3 root  wheel  102 14 Nov 22:02 jdk1.8.0_25.jdk
>> drwxr-xr-x  3 root  wheel  102  1 Dec 19:09 jdk1.9.0.jdk
>>
>> I then use lines like this in .bash_profile to control which Java I start:
>>
>> boxcat$ cat ~/.bash_profile
>> #JAVA_HOME=/Library/Java/JavaVirtualMachines/java9/Contents/Home
>> JAVA_HOME=/Library/Java/JavaVirtualMachines/java8/Contents/Home
>> #JAVA_HOME=/Library/Java/JavaVirtualMachines/java7/Contents/Home
>>
>> M2_HOME=/opt/maven
>> MONGO_HOME=/opt/mongodb
>> ATLAS_HOME=/opt/atlassian-plugin-sdk
>>
>> EDITOR=vi
>>
>> PATH=$JAVA_HOME/bin:$M2_HOME/bin:$ATLAS_HOME/bin:$MONGO_HOME/bin:$PATH
>>
>> export EDITOR JAVA_HOME M2_HOME ATLAS_HOME
>>
>> It would be great if the .dmg installer was able to respect JAVA_HOME
>>
>> Moving on, I then hit some other snags:
>>
>> * NetBeans doesn't work out of the box - due to MaxPermSize & MaxSize
>> options being fatal errors in 9
>>
>> * After editing the NB start script to remove those switches, NB will
>> start, but is basically useless as an IDE, as it can't find java.lang
>> - presumably b/c it's expecting rt.jat
>>
>> * Something has also broken C&P in this configuration - can't copy
>> text out of NB properly
>>
>> Will continue to explore & report back.
>>
>> Thanks,
>>
>> Ben
>>
>> On Tue, Dec 9, 2014 at 8:42 AM, Rory O'Donnell <rory.odonnell at oracle.com>
>> wrote:
>>
>>> Hi All,
>>>
>>> The initial changesets for JEP 220: Modular Run-Time Images [1] are
>>> available
>>> with JDK 9 early-access build 41 [2].
>>>
>>> To summarize (please see the JEP for details):
>>>
>>>      - The "jre" subdirectory is no longer present in JDK images.
>>>
>>>      - The user-editable configuration files in the "lib" subdirectory
>>>         have been moved to the new "conf" directory.
>>>
>>>      - The endorsed-standards override mechanism has been removed.
>>>
>>>      - The extension mechanism has been removed.
>>>
>>>      - rt.jar, tools.jar, and dt.jar have been removed.
>>>
>>>      - A new URI scheme for naming stored modules, classes, and resources
>>>         has been defined.
>>>
>>>      - For tools that previously accessed rt.jar directly, a built-in NIO
>>>         file-system provider has been defined to provide access to the
>>> class
>>>         and resource files within a run-time image.
>>>
>>> More details are available at Mark Reinhold's latest blog entry [3]
>>>
>>> Rgds, Rory
>>>
>>> [1] http://openjdk.java.net/jeps/220
>>> [2] https://jdk9.java.net/download/
>>> [3] http://mreinhold.org/blog/jigsaw-modular-images
>>>
>>>
>>>
>>> --
>>> Rgds,Rory O'Donnell
>>> Quality Engineering Manager
>>> Oracle EMEA , Dublin, Ireland
>>>
>>>
> --
> Rgds,Rory O'Donnell
> Quality Engineering Manager
> Oracle EMEA , Dublin, Ireland
>
>