Intellij拒绝将Kotlin目标jvm设置为1.8？

Question

ParallelStreams.kts:41:15: error: calls to static methods in Java interfaces are prohibited in JVM target 1.6. Recompile with '-jvm-target 1.8'
IntStream.range(0,10).parallel().forEach{a ->
         ^

好吧..。我不是在为1.6编译。

File > Project Structure > Project有project、1.8和语言级8。

File > Project Structure > Modules > Kotlin有目标平台：JVM 1.8。

File > Project Structure > Facets > Kotlin有目标平台：JVM 1.8。

File > Settings > Compiler > Kotlin Compiler有目标jvm版本的1.8。

我的梯度构造文件..。

plugins {
    id 'org.jetbrains.kotlin.jvm' version '1.3.0'
}

group 'foo'
version '1.0-SNAPSHOT'

repositories {
    mavenCentral()
}

dependencies {
    //kotlin
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
    implementation "org.jetbrains.kotlin:kotlin-script-runtime:1.3.0"

    //networking
    implementation 'com.mashape.unirest:unirest-java:1.4.9'
}

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

我已经没有地方检查1.8了。

是的，我曾尝试过试图使缓存无效并重新启动Intellij。它无助于解决这个问题。

Answer 1

添加sourceCompatibility和targetCompatibility for Java1.8：

plugins {
  id 'org.jetbrains.kotlin.jvm' version '1.3.0'
}

group 'foo'
version '1.0-SNAPSHOT'

repositories {
  mavenCentral()
}

// Add compatibility
sourceCompatibility = JavaVersion.VERSION_1_8
targetCompatibility = JavaVersion.VERSION_1_8


dependencies {
  //kotlin
  implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
  implementation "org.jetbrains.kotlin:kotlin-script-runtime:1.3.0"

  //networking
  implementation 'com.mashape.unirest:unirest-java:1.4.9'
}

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

Answer 2

使用.kts时，只需使用以下命令：

tasks {
    withType<KotlinCompile> {
        kotlinOptions.jvmTarget = "1.8"
    }
}

// I am using latest dsl and gradle 
val kotlinVersion = "1.3.30"
val gradleVersion = "5.4+"