Unable to create Scala class on IntelliJ

问题:

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?

回答1:

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

回答2:

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

Now try again.

回答3:

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.

回答4:

Right Click on the SrcScala folder :)

回答5:

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

回答6:

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.

回答7:

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

3. 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'
   
   } 
   

回答8:

    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.

回答9:

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

回答10:

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

回答11:

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

回答12:

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.

回答13:

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

回答14:

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