How to iterate over hashmap in Kotlin?

Another way that has not been mentioned is:

val mapOfItems = hashMapOf(1 to "x", 2 to "y", -1 to "zz")
mapOfItems.map { (key, value) -> println("$key = $value") }

For the above answer, be careful with Android below N!

map.forEach { key, value -> println("$key = $value") }

reference to Java 8 api which leads to:

Rejecting re-init on previously-failed class java.lang.Class<T>

---

map.forEach { (key, value) -> println("$key = $value") }

is Kotlin feature

It's not that difficult:

for ((key, value) in map) {
    println("$key = $value")
}

OR
_{(Updated in accordance with @RuckusT-Boom's and @KenZira's information.)}

 map.forEach { (key, value) -> println("$key = $value") }