kotlin-stdlib/kotlin.jvm.optionals/getOrDefault

getOrDefault

fun <T> Optional<out T & Any>.getOrDefault(defaultValue: T): T(source)

Returns this Optional's value if present, or otherwise defaultValue.

Since Kotlin

1.8

Samples

import java.util.Optional
import kotlin.jvm.optionals.*

fun main() { 
   //sampleStart 
   fun parsePortFromConfig(value: String): Optional<Int> = Optional.ofNullable(value.toIntOrNull())

val port = parsePortFromConfig("8081")
println(port.getOrDefault(8080)) // 8081

val otherPort = parsePortFromConfig("invalid")
println(otherPort.getOrDefault(8080)) // 8080 
   //sampleEnd
}