kotlin-stdlib / kotlin.text / toBooleanStrict

toBooleanStrict

Common
JVM
JS
Native
1.5
fun String.toBooleanStrict(): Boolean
(source)

Returns true if the content of this string is equal to the word "true", false if it is equal to "false", and throws an exception otherwise.

There is also a lenient version of the function available on nullable String, String?.toBoolean. Note that this function is case-sensitive.

import java.util.Locale
import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
println("true".toBooleanStrict()) // true
// "True".toBooleanStrict() //  will fail
// "TRUE".toBooleanStrict() //  will fail

println("false".toBooleanStrict()) // false
// "False".toBooleanStrict() //  will fail
// "FALSE".toBooleanStrict() //  will fail

// "abc".toBooleanStrict() //  will fail
//sampleEnd
}