try-with-resources: “use” extension function in Kotlin does not always work

Question

I had some trouble expressing the Java\'s try-with-resources construct in Kotlin. In my understanding, every expression that is an instance of AutoClosable shou

Answer 1

Kotlin 1.1+ has a standard library that targets Java 8 to support Closeable resource pattern - kotlin-stdlib-jre8

Gradle

compile "org.jetbrains.kotlin:kotlin-stdlib:1.1.1"
compile "org.jetbrains.kotlin:kotlin-stdlib-jre8:1.1.1"

Maven

    org.jetbrains.kotlin
    kotlin-stdlib
    1.1.1


    org.jetbrains.kotlin
    kotlin-stdlib-jre8
    1.1.1

Sample

val resource: AutoCloseable = getCloseableResource() 
resource.use { r -> //play with r }