fun <K, V> hashMapOf(): HashMap<K, V>
Returns an empty new HashMap.
import kotlin.test.*
import java.util.*
fun main(args: Array<String>) {
//sampleStart
val map = hashMapOf<Int, Any?>()
println("map.isEmpty() is ${map.isEmpty()}") // true
map[1] = "x"
map[2] = 1.05
// Now map contains something:
println(map) // {1=x, 2=1.05}
//sampleEnd
}fun <K, V> hashMapOf(vararg pairs: Pair<K, V>): HashMap<K, V>
Returns a new HashMap with the specified contents, given as a list of pairs where the first component is the key and the second is the value.
import kotlin.test.*
import java.util.*
fun main(args: Array<String>) {
//sampleStart
val map: HashMap<Int, String> = hashMapOf(1 to "x", 2 to "y", -1 to "zz")
println(map) // {-1=zz, 1=x, 2=y}
//sampleEnd
}
© 2010–2020 JetBrains s.r.o. and Kotlin Programming Language contributors
Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/hash-map-of.html