recommended IDE for developing openjdk?

[Maurizio Cimadamore]

On 18/01/2021 11:49, Pavel Rappo wrote:
> I note that the last time I configured IntelliJ IDEA for `openjdk/jdk` using a procedure similar to the one that Maurizio has just described, I had to tweak inclusion of generated source.
>
> IIRC, after the `idea.sh` script completed, I opened the project it created and went to "File > Project Structure... Project Settings > Modules > Add Content Root" to fix up the way `support/gensrc/java.base` was included. Before I did that, IntelliJ IDEA couldn't see `java.nio.ByteBuffer` and friends.
>
> There's always a chance that I followed the reference procedure incorrectly since I haven't seen others complaining about having had to do similar tweaks.
Hi Pavel,

this is also what I do.

I believe the problem is a consequence of something Chris and I have 
tried early on as a way to reduce indexing time of the project - e.g. a 
long time was spent indexing files in the build folder - so we excluded 
that. The project also re-add generated sources folders - but since 
these occur inside an excluded folder, it seems like the IDE gets confused.

I tried your trick of adding a new content folder and, while clever, it 
doesn't seem to help - e.g. as long as the build folder is excluded, the 
IDE cannot see the generated files when try to open a class (e.g. CTRL + N).

Maurizio

>
> -Pavel
>
>> On 18 Jan 2021, at 11:11, Maurizio Cimadamore <maurizio.cimadamore at oracle.com> wrote:
>>
>> Hi,
>> thanks for the pointer to the Eclipse project - I'm sure folks will find that useful.
>>
>> I think these days the IntelliJ support is relatively polished - there are features missing yes (for instance the project is monolitic, and not modularized, but folks here are using it pretty regularly and I can't say that has been a huge issue so far).
>>
>> To get started with intellij you have to create an IDE configuration first.
>>
>> 1. first run `sh configure` as you normally would to set up your JDK build - that build configuration would then be reused by Intellij
>>
>> 2. then run `sh bin/idea.sh <list of module names> - e.g. `sh bin/idea.sh java.base jdk.compiler java.desktop` - this will create an `.idea` folder in the current directory and set the sources for the JDK modules you specified.
>>
>> 3. open IntelliJ and point it to the folder where the `.idea` folder has been created. If everything worked correctly you should have a project up and running.
>>
>> The base project supports actions for cleaning, rebuilding the selected modules, or building a JDK image.
>>
>> Optionally, you can also build and install a jtreg plugin, to run and debug tests:
>>
>> https://openjdk.java.net/jtreg/intellij-plugin.html
>>
>>
>> I use this setup on a daily basis and I think it works pretty well - there are things that can be improved (for instance, I don't think the generated sources are always recognized correctly, we need to look into that), but I'm quite productive with it (especially with the jtreg plugin enabled).
>>
>> I know that there is also some limited support for VSCode (especially for hotspot development):
>>
>> https://github.com/openjdk/jdk/blob/master/doc/ide.md
>>
>> And that there is Netbeans support as well - CC'ing Jan who knows more than I do on how to get started there.
>>
>> Eventually we should collect all this info in a single place, but I never found the time to do so. Apologies!
>>
>> Cheers
>> Maurizio
>>
>>
>> On 18/01/2021 09:46, Langer, Christoph wrote:
>>> Hi Clemens,
>>>
>>> while I won't argue about the fanciness of the Eclipse user interface (��), I'd like to point you to a set of Eclipse projects that I created nevertheless...
>>>
>>> You'll find them here: https://github.com/RealCLanger/OpenJDKEclipseProjects
>>>
>>> The main benefit of these Eclipse projects is that the projects for all modules and tests are linked together so you will immediately recognize errors in dependencies. I think that doesn't work so well with IntelliJ.
>>>
>>> Another hint: There's a mailing list called ide-support-dev where questions around IDE support can get discussed.
>>>
>>> Best regards
>>> Christoph
>>>
>>>> -----Original Message-----
>>>> From: discuss <discuss-retn at openjdk.java.net> On Behalf Of Clemens
>>>> Eisserer
>>>> Sent: Freitag, 15. Januar 2021 21:33
>>>> To: discuss at openjdk.java.net
>>>> Subject: recommended IDE for developing openjdk?
>>>>
>>>> Hi,
>>>>
>>>> About 10 years ago I used eclipse to work on OpenJDK, however I would like
>>>> to get rid of it because of its slow/ugly user interface.
>>>> I wonder, are there any recommendations which IDE to use these days?
>>>> I gave IntelliJ a try but having not used it that much (except for some
>>>> fairly standard maven based projects) I failed to configure it correctly,
>>>> however I haven't tried Netbeans still.
>>>>
>>>> So to make it short: Which IDE is known to cope well with working on the
>>>> OpenJDK codebase?
>>>> And are there detailed instructions available for creating an openjdk
>>>> project with intellij?
>>>> Or would I be better off using netbeans?
>>>>
>>>> Thank, Clemens