SOLVED EDIT:

The IDE is running again after i installed sBo zulu-openjdk11 and pointed /etc/profile.d/idea.xx to the new jdk

BUT WHY THE SLACKS was it working before with java8? The IDE have not been auto updated, i checked same version still. And the IDEA sBo asks for java 8: --------------

I installed IntelliJ using sBo.

Had it working fine.

Installed multilib 15 for steam, working fine. (as i thought Conty for steam was causing input lag cause some emulation (secondary question if anybody want to share an input, would that be right?).

Anyway, now IntelliJ have this error:

EDIT:

1) Tried reinstalling zulu-openjdk8
2) The message says class compiled by java 11 (55) cant be recognized by java8 (52)
3) It was working before, i was able to create projects, actiavate, mess with settings.
4) Tried removing local user config files for clean install launch but same error.
5) I have installed audacity and had issues with audio, i may have tried installing a couple of different audio libs from sbo to make it work. will check (checked: after multilib i have reinstalled video drivers (mesa, xorg, intel- for steam) and installed for audacity: (alsa-plugins, jack2, vamp-)

According to [1] the runtime used for intellij is based on openjdk 11, so this seems entirely correct? Did it update also? Obviously installing multilib did not overwrite your intellij installation so it's probably just a coincidence, and the class files at version 55 would never work with any java 8. Perhaps something changed the default java you already had since installing multiple jdks or runtimnes will make a mess of JAVA_HOME on slackware since each will dump something into /etc/profile.d.

FWIW Since java 9 applications are supposed to just bundle their own runtimes and no longer use a system runtime, I think it's kinda pants vs clicking on a jar but that's what's been decided for some technical and some political reasons and it's something that intellij seemingly does itself (but i don't use it so i'm just going off that page). I'd also be wary of any free 'openjdk' that isn't tracking the latest official release as that's the only fully supported free one (i.e. 17 at time of writing). See [2] -- pron89 is an openjdk developer who's been trying to clarify this seemingly forever on reddit. Although for running local trusted software like an IDE it's probably not super-critical and intellij does come with it's own presumably-supported runtime anyway, then again the latest is quite a bit faster.

Also I don't see why conty should add any appreciable latency but I suppose it might. It seems to add a bit of a file i/o overhead to stuff in the compressed image but that doesn't include games which are installed into ~/.local. It's just a chroot 'arch' installation and still just hits the kernel directly for most of what it does and doesn't do any emulation (wine is not an emulator etc, let alone native games).

[1] https://www.jetbrains.com/help/idea/...ion-guide.html
[2] https://old.reddit.com/r/java/commen...n_ffs/g0so60h/

I don't mean to "pile on" on a solved thread but i guess [1] explains why it was working with jdk8:

I should say that i used the IdeaC Slackbuild but with the IdeaJ package.

But still, not sure why this JetBrains Runtime bundled with the IDE stopped working. Intalling the zulu jdk11 solved.