types/kotools.types.number/StrictlyNegativeDouble/Companion/createOrNull

createOrNull

fun createOrNull(number: Number): StrictlyNegativeDouble?

Creates a StrictlyNegativeDouble from the specified number, which may involve rounding or truncation, or returns null if the number is greater than or equals zero.

Calling from Kotlin

Here's an example of calling this method from Kotlin code:

val number: Number = Random.nextInt(Int.MIN_VALUE until 0)
val actual: StrictlyNegativeDouble? =
    StrictlyNegativeDouble.createOrNull(number)
assertNotNull(actual)

Calling from Java

Here's an example of calling this method from Java code:

final Random random = new Random();
final Number number = random.nextInt(Integer.MIN_VALUE, 0);
final StrictlyNegativeDouble actual =
        StrictlyNegativeDouble.Companion.createOrNull(number);
Assertions.assertNotNull(actual);

You can use the StrictlyNegativeDouble.Companion.create method for throwing an exception instead of returning null in case of invalid number.