build.gradle

buildscript {
  ext.kotlin_version = 'latest.release'
  repositories {
    mavenCentral()
  }
  dependencies {
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
  }
}

apply plugin: 'kotlin'
apply plugin: 'application'

// group 'KotlinSwingTips'
// version '1.0-SNAPSHOT'

mainClassName = 'example.AppKt'

defaultTasks 'run'

repositories {
  mavenCentral()
}

dependencies {
  implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
  testImplementation 'junit:junit:4.11'
  testImplementation "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version"
}

sourceCompatibility = 1.8

compileKotlin {
  kotlinOptions.jvmTarget = "$sourceCompatibility"
}

compileTestKotlin {
  kotlinOptions.jvmTarget = "$sourceCompatibility"
}

jar {
  manifest { attributes 'Main-Class': "$mainClassName" }
  from { configurations.compileClasspath.collect { it.isDirectory() ? it : zipTree(it) } }
}