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
Source:
OptionConverters.scala
class Object
trait Matchable
class Any

Type members

Classlikes

final implicit implicit class RichOption[A](o: Option[A]) extends AnyVal

Provides conversions from Scala Option to Java Optional types

Provides conversions from Scala Option to Java Optional types

Source:
OptionConverters.scala
final implicit implicit class RichOptional[A](o: Optional[A]) extends AnyVal

Provides conversions from Java Optional to Scala Option and specialized Optional types

Provides conversions from Java Optional to Scala Option and specialized Optional types

Source:
OptionConverters.scala
final implicit implicit class RichOptionalDouble(o: OptionalDouble) extends AnyVal

Provides conversions from OptionalDouble to Scala Option and the generic Optional

Provides conversions from OptionalDouble to Scala Option and the generic Optional

Source:
OptionConverters.scala
final implicit implicit class RichOptionalInt(o: OptionalInt) extends AnyVal

Provides conversions from OptionalInt to Scala Option and the generic Optional

Provides conversions from OptionalInt to Scala Option and the generic Optional

Source:
OptionConverters.scala
final implicit implicit class RichOptionalLong(o: OptionalLong) extends AnyVal

Provides conversions from OptionalLong to Scala Option and the generic Optional

Provides conversions from OptionalLong to Scala Option and the generic Optional

Source:
OptionConverters.scala

Implicits

Implicits

final implicit def RichOption[A](o: Option[A]): RichOption[A]

Provides conversions from Scala Option to Java Optional types

Provides conversions from Scala Option to Java Optional types

Source:
OptionConverters.scala
final implicit def RichOptional[A](o: Optional[A]): RichOptional[A]

Provides conversions from Java Optional to Scala Option and specialized Optional types

Provides conversions from Java Optional to Scala Option and specialized Optional types

Source:
OptionConverters.scala

Provides conversions from OptionalDouble to Scala Option and the generic Optional

Provides conversions from OptionalDouble to Scala Option and the generic Optional

Source:
OptionConverters.scala

Provides conversions from OptionalInt to Scala Option and the generic Optional

Provides conversions from OptionalInt to Scala Option and the generic Optional

Source:
OptionConverters.scala

Provides conversions from OptionalLong to Scala Option and the generic Optional

Provides conversions from OptionalLong to Scala Option and the generic Optional

Source:
OptionConverters.scala