OptionConverters
scala.jdk.OptionConverters
object OptionConverters
This object provides extension methods that convert between Scala Option
and Java Optional
types.
When writing Java code, use the explicit conversion methods defined in javaapi.OptionConverters instead.
Scala Option
is extended with a toJava
method that creates a corresponding Optional
, and a toJavaPrimitive
method that creates a specialized variant (e.g., OptionalInt
) if applicable.
Java Optional
is extended with a toScala
method and a toJavaPrimitive
method.
Finally, specialized Optional
types are extended with toScala
and toJavaGeneric
methods.
Example usage:
import scala.jdk.OptionConverters._
val a = Option("example").toJava // Creates java.util.Optional[String] containing "example"
val b = (None: Option[String]).toJava // Creates an empty java.util.Optional[String]
val c = a.toScala // Back to Option("example")
val d = b.toScala // Back to None typed as Option[String]
val e = Option(2.7).toJava // java.util.Optional[Double] containing boxed 2.7
val f = Option(2.7).toJavaPrimitive // java.util.OptionalDouble containing 2.7 (not boxed)
val g = f.toScala // Back to Option(2.7)
val h = f.toJavaGeneric // Same as e
val i = e.toJavaPrimitive // Same as f
Attributes
- Source
- OptionConverters.scala
- Graph
-
- Supertypes
- Self type
-
OptionConverters.type
Members list
Keywords
- no keywords
- final
- implicit
In this article