Unable to create Scala class on IntelliJ

Question

I'm just starting to learn Scala. I have installed the Scala plugin for IntelliJ, and created a new Scala project. But when I right-click on the src folder to make a new Scala class, there is no option to do so. Am I missing something?

Have you specified the Scala SDK? It should work if you set up the project properly and specified the SDK. — evan.oman, Jun 24 '16 at 06:38
I tried replicating the same issue but I get to make the scala file. I can suggest you a work around : Make a new Project and in scala select the sbt project and then inside the src.main make a new scala file. I hope that helps or you can try RESET the settings of intellij. — Shivansh, Jun 24 '16 at 06:39
Like @evan058 said, it's the SDK. For some reason, IntelliJ does not pick scala sdk automatically sometimes. And if it's not configured, this happens. — Niks, Jun 24 '16 at 06:55
Another possibility is that you're using the wrong path for Scala sources. They should go into `src\main\scala` or `src\test\scala`. If you have `sbt` installed, you can launch it in your project dir and invoke command `inspect scalaSource`, and it will show you where the Scala sources must be. — Haspemulator, Jun 24 '16 at 12:47
Please see the comments inside other answers. A space in the project could be the reason of this error. — villancikos, Jan 29 '17 at 14:15
Same issue - there is a blue folder under src>main that is called scala. That does bring up scala class when I right click but not the src folder. Has something changed in the IDE that is making the tutorials out of date or is this not right? — Reddspark, Aug 31 '17 at 18:37
In my case (IntelliJ version 2018.3.2), if my project name contains uppercase letter, I encounter the same issue as OP. However, if I name the project all lowercase letters, the problem goes away. — Fanchen Bao, Aug 19 '19 at 20:08

score 307 · Accepted Answer · edited Aug 15 '19 at 08:36

307

Right click on your project, "Add Framework support" and choose Scala framework, then by right click on the packages you can create Scala Class.

After this, right click on src > Mark directory as > Sources Root.

Doing both of these should fix your problem!

edited Aug 15 '19 at 08:36

Jsleshem

715
1
10
31

answered Oct 12 '16 at 11:07

Majico

3,810
2
24
36

7

Only can add scala scripts now but no classes?! Any ideas? – cs0815 Jul 15 '17 at 11:13
12

I have the same problem and I don't see Scala Framework in the Add Framework menu – Michael P Jul 26 '17 at 00:44
1

Look carefully. Scala class is in the first section, but scala script is also in the list – Alexandr Dec 15 '17 at 14:25
Also this step will ONLY work if you have updated your correct PROXY settings under File>Settings. – nanosoft Sep 03 '18 at 13:04
1

I have the scala plugns installed, but the Scala framework option is not on the left, only Maven – acmoune Dec 25 '18 at 18:06
I had to do both this, and 'right click on src > Mark directory as > Sources Root' as the second answer says! – Jsleshem Aug 14 '19 at 20:27
@MichaelP I think your project is already in the Scala framework i.e. the reason for missing in the list. – Srinathji Kyadari Dec 16 '19 at 15:54

score 126 · Answer 2 · answered Aug 31 '17 at 18:40

126

I figured it out, right click on src > Mark directory as > Sources Root.

Now try again.

answered Aug 31 '17 at 18:40

Reddspark

6,934
9
47
64

3

Great! Combining your answer and the top answer did the trick! – hzitoun Mar 21 '18 at 15:01
1

I had to do both this and the top answer! – Jsleshem Aug 14 '19 at 20:27
1

This should be top. – hunzter Apr 09 '20 at 04:39

score 25 · Answer 3 · edited May 21 '17 at 09:03

25

I just had this issue, also. It turned out that IntelliJ hadn't marked my src/main/scala folder as a "source" folder.

To do this: Project Structure -> Modules -> right click folder and Mark as "Source" (blue)

Similarly the src/main/test folder wasn't marked as a test folder. I was able to add scala classes after those folders were appropriately marked.

edited May 21 '17 at 09:03

Geoff James

3,122
1
17
36

answered May 20 '17 at 21:22

Mike Pors

318
3
5

This is correct - though I did it a slightly different (and quicker) way below. – Reddspark Aug 31 '17 at 18:42

score 11 · Answer 4 · edited Sep 25 '20 at 14:52

11

I had the same problem when I created my first Scala project and I was able to solve it in a simpler way. Click on the "Search everywhere" button and type "sbt", or click directly on the "sbt" button located on the right near the edge of the screen.

sbt button

Now just click on the "Reload all sbt project" button.

reload all sbt project button

This worked for me, I hope it will help someone.

edited Sep 25 '20 at 14:52

Rayees AC

4,426
3
8
31

answered Sep 25 '20 at 07:34

Daniele F

131
1
4

score 9 · Answer 5 · answered Jun 24 '16 at 18:14

9

Right Click on the ~~Src~~Scala folder :)

answered Jun 24 '16 at 18:14

Keith Pinson

1,725
1
14
17

17

The problem described is exactly what you're showing. No Scala Class in that menu. This animation is not helpful – Michael P Jul 26 '17 at 00:43
3

The animation demonstrates that the menus are context sensitive. Right clicking on the "scala" folder offers the option to select "Scala Class"; right clicking on the "src" folder does not. – Keith Pinson Jul 27 '17 at 00:31
So is this normal behavior and all the tutorials are out of date? – Reddspark Aug 31 '17 at 18:38
@user1761806 I have never reviewed any so I couldn't tell you if any tutorials are out of date. On that subject, I expect this answer about context-sensitive menus to become out of date, but as of InteliJ 2017.2 the animation is still illustrative even though the UI has changed. – Keith Pinson Sep 02 '17 at 13:43
2

Animation is not helpful. You can definitely have directories like /scala (and mark it has Sources Root) and still New Scala Class won't show up. Correct answer is by @Majico – Kumar Vaibhav Nov 06 '18 at 20:33

score 7 · Answer 6 · answered Oct 11 '16 at 13:47

7

I had this problem everytime I created a new project with spaces in the name. eg "Hell Wev". Using "HellWev" or similar as a project name seems to work fine

answered Oct 11 '16 at 13:47

cwadeevans

139
1
4

2

I also had this problem starting a project name with a number. After renaming, everything worked fine. – user3846506 Jan 14 '17 at 23:11
Just to add my grain of salt. Yes, a space in the project folder creates this behavior. – villancikos Jan 29 '17 at 14:14
1

Had the same problem and @user3846506's comment was the answer for me, I recreated the project without a number in the name and the scala folder was blue instead of grey as soon as the project opened. – Shurikn Nov 10 '17 at 12:00

score 6 · Answer 7 · answered Oct 20 '16 at 03:30

In IDEA 2016.2.5

From a new SBT or Scala project.

Open Project Structure
On the Project tab add your JDK (should also be visible in SDKs tab)
Under Global Libraries add Scala SDK.

Sadly just adding this to your build.SBT does not impact the IDE behavior.

score 6 · Answer 8 · answered Apr 13 '19 at 03:48

6

On IntelliJ IDE 2019.1 Ultimate, enable FRAMEWORK Scala like this screens:

answered Apr 13 '19 at 03:48

Claudio

121
2
4

1

Thanks for the answer with Images... It worked like Charm! – Srinathji Kyadari Dec 16 '19 at 15:51

score 6 · Answer 9 · answered Oct 24 '19 at 05:45

I had the same problem and what I did is Right Clicked on the Project ---> Then Choose Add Framework Support--> In the Left hand corner there was a list mentioned of Groovy, Kotlin, Maven and Scala.---> From the List I choose Scala but still had issue because the librabry was not specified--->Clicked on Create and it asked me to choose the version as I had Installed 2.11.12, i choose it and it started downloading it. Once it was downloaded I selected Scala and the issue was fixed.

Thank you. It really helped me. – Thiago Melo Jul 28 '20 at 20:44 — Thiago Melo, Jul 28 '20 at 20:44

score 4 · Answer 10 · answered Sep 09 '18 at 13:22

4

Go to Src folder and choose Mark as Directory then choose the option called source root, that would fix your problem.

answered Sep 09 '18 at 13:22

Sai Mammahi

217
2
14

score 3 · Answer 11 · answered Sep 05 '17 at 13:00

3

add libraryDependencies += "org.scala-lang.modules" %% "scala-parser-combinators" % "1.0.50" in target -> built.sbt file this works for IntelliJ IDEA 2017

answered Sep 05 '17 at 13:00

techie95

515
3
16

This worked for me in IntelliJ IDEA 2018.3, except I changed the version number to `1.1.1`. – Evan Knowles Mar 12 '19 at 08:47

score 3 · Answer 12 · answered Jun 14 '18 at 20:11

Created new gradle project (java)
Add new module "scala" into /src/main/ and "Make Directory" as source ...

added dependencies into build.gradle:

group 'example-scala'
version '1.0-SNAPSHOT'

apply plugin: 'java'
apply plugin: 'scala'

sourceCompatibility = 1.8

repositories {
     mavenCentral()
}

dependencies {
   compile 'org.scala-lang:scala-library:2.12.6'
   testCompile 'org.scalatest:scalatest_2.11:3.0.5'
   testRuntime 'org.scala-lang.modules:scala-xml_2.11:1.0.6'
   testCompile group: 'junit', name: 'junit', version: '4.12'

}

score 3 · Answer 13 · answered Jul 08 '19 at 10:59

3

In my case after selecting Sources Root it not shown me any Scala Class option then I choose Generated Sources Root, right click on src > Mark directory as > Generated Sources Root. This worked for me

answered Jul 08 '19 at 10:59

GANESH CHOKHARE

316
3
8

score 1 · Answer 14 · answered Jun 24 '16 at 17:30

Intellij by default doesn't pick up the dependencies at times. You'll need to create a seperate sbt or maven project and then import it to Intellij.

If you want to create a Java Scala Mixin project you can follow this blog post. And then import it in Intellij.

Or if your just trying to learn Scala.

You can download this maven based Scala Starter Template and import it in intellij and then continuing working on it.

Note : You might have to specify the sources for the module in the

Project Structure -> Modules Tab

score 1 · Answer 15 · answered Nov 14 '18 at 13:01

    You can add the scala maven plugin reference in the pom.xml as below 

 <build>
    <sourceDirectory>src/main/scala</sourceDirectory>
    <testSourceDirectory>src/test/scala</testSourceDirectory>
        <plugins>
            <plugin>
                <groupId>net.alchim31.maven</groupId>
                <artifactId>scala-maven-plugin</artifactId>
                <version>3.2.2</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>compile</goal>
                            <goal>testCompile</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <scalaCompatVersion>2.11</scalaCompatVersion>
                    <scalaVersion>2.11.8</scalaVersion>
                </configuration>
            </plugin>
        </plugins>
    </build>

    Once you do this and build you will be able to see the option of the scala class.

This one will work when you are creating project with mavan framework, and in case of SBT you have add build.sbt file — Chetan Hirapara, Nov 15 '18 at 06:19
@ChicksPatel Yes it would work when you are creating project with maven framework only. As no specific framework was mentioned in the question I thought the answer might help someone. — Nikunj Kakadiya, Nov 15 '18 at 07:17

score 1 · Answer 16 · answered Dec 21 '18 at 08:19

1

I also faced same issue, the scala file options were not not visible in intellij Idea editor because Scala SDK was not installed. So you get rid of this issue after installing SDK for Scala.

answered Dec 21 '18 at 08:19

Vishnu Kant Tripathi

31
2

1

Should be a comment – executable Dec 21 '18 at 08:22

score 1 · Answer 17 · answered Feb 07 '20 at 11:40

1

Following the below steps resolved for me:

Add scala plugin to your Intellij IDE.(Plugins can be added by navigating to File -> settings -> plugins)
Enable scala plugin
Restart IDE

answered Feb 07 '20 at 11:40

saikumar18

15
1
5

score 0 · Answer 18 · answered Nov 19 '17 at 05:15

0

You just need to select the 'Package' instead of 'Project' option from the drop-down menu just above your project name.

answered Nov 19 '17 at 05:15

Nil

1

score 0 · Answer 19 · answered May 16 '18 at 08:31

I experienced this behavior when the folder was not correctly marked as a source folder (blue folder symbol). If that is the case, simply right-click on the whole project and choose Open Module Settings where you can then mark the respective folder as source: Module settings where you may select src as Source folder

score 0 · Answer 20 · answered May 02 '19 at 05:33

0

I had a similar problem and what I did to resolve is just create a package by right clicking on src/main/scala. Once package is created, right click on package and you should be able to find scala class option.

answered May 02 '19 at 05:33

Waseem Hawaldar

41
3

score 0 · Answer 21 · answered May 24 '21 at 02:24

0

In case someone else is having the same problem and the above didn't work, what worked for me was to:

Close IntelliJ
Delete the .idea folder
Open the project

answered May 24 '21 at 02:24

ticot55

47
4

score 0 · Answer 22 · answered Aug 03 '21 at 08:23

0

It's all about the jdk when creating a project. Click "download" in the corresponding Java selection column and it will select the version for you

answered Aug 03 '21 at 08:23

popolil

1

Unable to create Scala class on IntelliJ

22 Answers22

Linked

Related