IntelliJ IDEA Ultimate 2018.3 thinks my Java 9 Project is a Kotlin Project

Question

I have an IntelliJ project composing several subprojects which are all Java 9 modules. I use Maven as a build system. My project has no "Facets". My run configuration looks like this:

My project settings look like this:

I can build everything with Maven just fine. However, when I try to compile with IntelliJ, it somehow thinks that my project is a Kotlin project and can't compile it:

Error:Kotlin: The Kotlin standard library is not found in the module graph. Please ensure you have the 'requires kotlin.stdlib' clause in your module definition

Has anyone any idea how to fix this? I already tried deleting the run configuration and recreated it. This fixes the problem for some time, but then it reappears randomly.

Please file a bug at https://youtrack.jetbrains.com/issues/KT and share the sample project to reproduce (privately). — CrazyCoder, Nov 27 '18 at 10:29
As a workaround, I disabled the Kotlin plugin in IntelliJ. I have to check if I'm allowed to share the project... — dax, Nov 27 '18 at 14:22
I've submitted a bug report under IntelliJ IDEA: https://youtrack.jetbrains.com/issue/IDEA-224595 — Osmund Francis, Oct 10 '19 at 20:03
Submitted issue: https://youtrack.jetbrains.com/issue/KT-27458 — Osmund Francis, Oct 11 '19 at 07:50

score 42 · Answer 1 · answered Jun 13 '19 at 14:03

42

Even in 2019.1.3 that error is there .

A solution that always works for me is :

Build menu => Rebuild Project

Tested with JDK 12.0.1

That should be fixed though by IntelliJ team as soon as possible as more and more Java projects are passing to JDK 11 ++

answered Jun 13 '19 at 14:03

GOXR3PLUS

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@dax If the above answer is a solution for you , please mark as an answer :) – GOXR3PLUS Mar 05 '20 at 09:26
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@dm_tr Happy to hear :) – GOXR3PLUS Mar 18 '22 at 11:14

xcesco · Answer 2 · 2020-01-22T07:13:47.640

17

I had the same problem. I worked in a pure Java project managed with Maven. Till some days ago I applied the solution "rebuild" the project, but sometimes the error came back again.

After more investigation, I found that after disable "Enable migration detection" menu, the problem disappears.

I hope this helps.

edited Jan 22 '20 at 07:13

answered Jan 07 '20 at 12:56

xcesco

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that worked for me too! first disable the 'Enable migrations detection' and then rebuild project. – Gilian Marques Mar 29 '20 at 14:41

score 3 · Answer 3 · answered Feb 26 '19 at 19:54

3

Try to rebuild the module using Ctrl+Shift+F9 or right click on the module and select "Rebuild " in menu.

answered Feb 26 '19 at 19:54

Yury Savchuk

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it doesn't answer the question, I think. Since author mentions that some workaround helps for some time, the goal is to have stable successful build, not just to build once. – Alex Guteniev Feb 26 '19 at 20:15
I got above error when I created javafx project using maven archetypes and ran app using intellij run configuration. Rebuild however fixed it – sigirisetti Jun 07 '19 at 05:52

Naman · Answer 4 · 2018-11-27T10:40:04.113

1

Meanwhile, this can be fixed using the kotlin-stdlib.jar available in Kotlin JavaRuntime:

module kotlin.test {
    requires kotlin.stdlib;
}

where kotlin.test should be replaced with your module name.

Just in case the details matter, I am using

IntelliJ IDEA 2018.3 (Community Edition)
Build #IC-183.4284.148, built on November 21, 2018

and the Kotlin JavaRunTime mentioned above has sources from the path Contents/plugins/Kotlin/kotlinc/lib within the IntelliJ .app which includes kotlin-stdlib.jar as one of them.

edited Nov 27 '18 at 10:40

answered Nov 27 '18 at 10:32

Naman

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Thanks for the answer, but I do not want to add any requirements to my project to things I do not need... – dax Nov 27 '18 at 14:24
1

@dax I do understand that, and that's why have used the first word *Meanwhile*. Better solution would the IDE fixing this, which is where you can report a bug as CrazyCoder pointed out. – Naman Nov 27 '18 at 14:29

score 1 · Answer 5 · answered Jun 15 '20 at 09:03

1

I fixed this error by disabling Kotlin plugin since I am not using it and the problem is solved

answered Jun 15 '20 at 09:03

JyotiKumarPoddar

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score 0 · Answer 6 · answered Mar 03 '20 at 12:42

0

i had the same problem i deleted the file and start all over again, and its work fine after it

answered Mar 03 '20 at 12:42

score 0 · Answer 7 · answered Jul 18 '20 at 02:52

Update your module-info.java file

requires javafx.fxml;
requires javafx.controls;
requires javafx.graphics;
requires javafx.web;

opens sample;

opens sample.controller;

It opens the package (eg. sample) which contains your Launcher file and opens package conatinsyoyr controllers and its corresponding fxml files (eg. sample.controller)

score 0 · Answer 8 · answered Sep 05 '21 at 11:19

0

This is the Last Option that worked for me.. You need to check few things first

try installing the project using

mvn clean install

If the project gets Installed then this is an issue of your IDE being unable to correctly build your project

FIX:: Worked For me Reinstall IDE.. Will save you a day.

answered Sep 05 '21 at 11:19

Utshav Timsina

1

Please add further details to expand on your answer, such as working code or documentation citations. – Community Sep 05 '21 at 12:13

score -2 · Answer 9 · edited Jun 14 '20 at 12:59

-2

I had the same issue. Here is what worked:

On IntellijIDEA go to 'Tools' menu at the top of the application: .
Then scroll down to 'Kotlin'.
Click 'Configure Kotlin in Project'.

edited Jun 14 '20 at 12:59

HAVB

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answered Jun 14 '20 at 10:53

mpho shai

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IntelliJ IDEA Ultimate 2018.3 thinks my Java 9 Project is a Kotlin Project

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