LocalDateTime in IntelliJ IDEA Kotlin shows as unresolved reference

Question

java.time seems to be missing entirely. The code I'm trying it in is a simple

fun main(args: Array<String>) {
    println(LocalDateTime.now())
}

Seems like I am missing something fundamental, but all I have been doing is following along in a tutorial and it just worked for the tutor.

Answer 1

The LocalDateTime class has only been introduced in Java SE 8, so you need to compile your project against JDK 8 or newer.

Make sure that:

• You have an installed JDK 8 or newer;

• Your project is compiled against this JDK 8+.

  (In IntelliJ IDEA, Ctrl / ⌘ + Shift + Alt + S → Project → Project SDK ; other build systems should be set up separately)

With the JDK configured correctly, the code should run fine as-is: (demo)