IntelliJ IDEA: How to specify main class in Kotlin?

I try to build a jar with Intellij Idea with Kotlin Gradle project.
Idea doesn't see my main class when I try to configure Artifact

here's my Gradle :

plugins {
id 'java'
id 'org.jetbrains.kotlin.jvm' version '1.3.60'
id 'application'
}
group 'org.vladdrummer'
version '1.0-SNAPSHOT'

sourceCompatibility = 1.8

repositories {
mavenCentral()
}

sourceSets {
main.java.srcDirs += 'src/main/kotlin/'
}

jar {
manifest {
attributes 'Main-Class': 'MovieQuizBackendKt'
}
}

dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
compile "com.sparkjava:spark-kotlin:1.0.0-alpha"
implementation 'com.google.code.gson:gson:2.8.2'
runtime 'mysql:mysql-connector-java:5.1.34'
testCompile group: 'junit', name: 'junit', version: '4.12'
}

compileKotlin {
kotlinOptions.jvmTarget = "1.8"
}
compileTestKotlin {
kotlinOptions.jvmTarget = "1.8"
}

Here's structure :

[![structure][1]][1]


Here's main class :

class MovieQuizBackend {

fun main(args: Array<String>) {
Server()
}
}

[1]:

In Kotlin language entry point is not a method inside the class (a class with the `Kt` suffix in the name is generated automatically from a file). See [the documentation](

[To see links please register here]

).

Your code inside the `MovieQuizBackend.kt` file needs to be changed to the following:

```
fun main(args : Array<String>) {
Server()
}
```

Just remove the `class MovieQuizBackend {` and `}` at the end.

You can even omit `args` if you don't plan to pass any:

```
fun main() {
Server()
}
```

Another option is to use `@JvmStatic` annotation inside the `companion object`:

```
class MovieQuizBackend {
companion object {
@JvmStatic fun main(args : Array<String>) {
Server()
}
}
}
```

Note that this way the main class is named just `MovieQuizBackend` instead of `MovieQuizBackendKt`, so you will need to change it in `build.gradle`:

```
jar {
manifest {
attributes 'Main-Class': 'MovieQuizBackend'
}
}
```