IntelliJ Kotlin - How do I fix "Ensure that you have a dependency on the Kotlin standard library" in a project?

Question

I've been trying to set up a new Kotlin project in IntelliJ IDEA, using the default IntelliJ Build System (not Gradle) and JDK 15. Whenever it creates the default main.kt file, and I try to build and run the main function, which looks like this:

fun main(args: Array<String>) {
    println("Hello World!")
}

the build fails after a short time with the following errors:

Kotlin: Cannot access built-in declaration 'kotlin.Array'. Ensure that you have a dependency on the Kotlin standard library

Kotlin: Cannot access built-in declaration 'kotlin.String'. Ensure that you have a dependency on the Kotlin standard library

and

Kotlin: Unresolved reference: println

I've tried changing the project SDK to the kotlin SDK, to Java 14 and to Java 1.8. I'm not sure exactly how to add the dependency it asks for. Any help is appreciated.

This is what the dependencies window shows within the project:

Right now the project is using JDK 15, and Kotlin 1.4.10. I've tried updating the plugin, uninstalling and reinstalling, deactivating and reactivating, all to no avail.

Please attach screenshot from "Project Structure | Modules - Dependencies" tab. — y.bedrov, Nov 19 '20 at 07:24
Project configuration looks fine. Could you please attach your project to check IDE generated files? — y.bedrov, Nov 24 '20 at 08:17
Please try to remove ".idea/libraries" file and reimport project again. — y.bedrov, Nov 25 '20 at 11:29

score 31 · Answer 1 · edited Dec 10 '21 at 13:53

31

Try enabling KotlinJavaRuntime

Open Project Structure window (File > Project Structure)
Go into Modules
Go to Dependencies tab
Tick the Enable KotlinJavaRuntime checkbox

edited Dec 10 '21 at 13:53

Jonas Borggren

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answered Dec 09 '21 at 09:53

vbevans94

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3

I do not have such a checkbox `Enable KotlinJavaRuntime`. – mercury Mar 06 '23 at 01:50

score 11 · Accepted Answer · answered Nov 25 '20 at 12:01

11

Removing the .idea/library file inside the project directory and then selecting "use library from plugin" when prompted to configure Kotlin files by the IDE solved the problem.

answered Nov 25 '20 at 12:01

A. P. Roblem

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1) close project 2) delete `*.iml` and whole `.idea` directory 3) open the project again – Ilya Serbis Apr 28 '21 at 15:42

score 4 · Answer 3 · answered Nov 19 '20 at 07:41

Please provide more information and check what Kotlin version do you have installed:

Tools > Kotlin > Configure Kotlin Plugin Updates: install the latest version of Kotlin
File > Project Structure > Project: what is your Project SDK there? Choose 15 (something line java version "15.0.1"). If you don't have 15 there, click "+" and add the newest version (unless you need an older version).

score 2 · Answer 4 · 2021-02-16T13:32:30.473

2

Probably you need to add KotlinJavaRuntime library in you project. Please see paragraph "Create Kotlin files in Java projects" in https://www.jetbrains.com/help/idea/mixing-java-and-kotlin-in-one-project.html After configuration you should see needed jars in lib folder in your project. Rebuild you project. Make also File->Invalidate Cache/Restart.

edited Feb 16 '21 at 13:32

answered Feb 08 '21 at 14:09

score 1 · Answer 5 · answered Aug 23 '21 at 14:07

I tried all of the above but eventually found out, that in one project, my SDKs were completely broken after the newest Intellij Update. If you go to Project Structure -> Platform Settings -> SDKs, I had an entry for Kotlin with a non existing path for an Intellij Version of last year. This was definitely not there before and it seems to have messed up the kotlin installation. After i deleted that entry and as described above the libraries as well, it worked again.

score 1 · Answer 6 · answered Mar 23 '22 at 22:30

1

For me this helped:

Close the project
Delete idea. folder
Open project

answered Mar 23 '22 at 22:30

Willi Mentzel

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score 1 · Answer 7 · answered Nov 01 '22 at 14:22

1

In this case, it was a misconfigured IntelliJ instance.

Project Structure -> SDKs -> kotlinSDK -> + -> ok

rebuild will be work fine

answered Nov 01 '22 at 14:22

Moustafa Shamaa

41
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score 1 · Answer 8 · answered Nov 16 '22 at 14:47

In my case the Kotlin Standard Library JDK extension was missing. https://mvnrepository.com/artifact/org.jetbrains.kotlin/kotlin-stdlib-jdk8

<dependency>
    <groupId>org.jetbrains.kotlin</groupId>
    <artifactId>kotlin-stdlib-jdk8</artifactId>
    <version>1.7.21</version>
</dependency>

score 0 · Answer 9 · answered Mar 20 '21 at 14:18

I have a Ubuntu 16.04 with IntelliJ 2020.3 newly installed. I run to the same issue here.

To solve this issue, I made a new kotlin file in my project. Then when the system was trying to add this new Kotlin file, you can find a notification related to "Configure project" on the right bottom corner of screen, click the notification. I get the following dialog.

Then check the Use library from plugin, this solve the issue. Use library from plugin

score 0 · Answer 10 · answered Jul 08 '23 at 20:01

0

You can open files in folder ".idea" and see if there are closing tags </tagName> missing at the end of each file.

answered Jul 08 '23 at 20:01

tananyGeek

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IntelliJ Kotlin - How do I fix "Ensure that you have a dependency on the Kotlin standard library" in a project?

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