Kotlin, gradle, idea - unresolved reference while using javaClass

Hello, I’m stepping first steps with kotlin and today I have faced the issue as follows:

I’m getting this:

While trying to set up logger. It can’t be imported. Even if I manually type the import declaration it can’t see this.

My gradle config is:

group 'org.dreando'
version '1.0-SNAPSHOT'

buildscript {
    ext.kotlin_version = '1.1.2-2'
    ext.spring_boot_version = '1.5.3.RELEASE'

    repositories {
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath "org.springframework.boot:spring-boot-gradle-plugin:$spring_boot_version"

apply plugin: 'idea'
apply plugin: 'kotlin'
apply plugin: 'org.springframework.boot'
apply plugin: 'application'

jar {
    baseName = 'bt-server'
    version = '0.0.1'

springBoot {
    mainClass = 'org.dreando.ServerRunner.kt'

repositories {

dependencies {
    compile "org.jetbrains.kotlin:kotlin-stdlib"
    compile 'org.springframework.boot:spring-boot-starter'
    compile 'org.springframework.boot:spring-boot-starter-web'
    compile "org.springframework.boot:spring-boot-starter-data-mongodb"
    testCompile "org.springframework.boot:spring-boot-starter-test"
    testCompile 'junit:junit'

task wrapper(type: Wrapper) {
    gradleVersion = '2.9'

Do you have any idea what could I messed up here?

Btw - the idea plugin version matches the one from gradle.

Thanks in advance for any help.

The javaClass function is an old way to access the Java class of an object which only existed in Kotlin versions before 1.0. You need to use TestService::class instead. See the documentation for more information.

In fact even


Thank you :slight_smile: