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scala-library-sjs/scala/scala.jdk/FunctionConverters

FunctionConverters

scala.jdk.FunctionConverters
object FunctionConverters extends Priority0FunctionExtensions

This object provides extension methods that convert between Scala and Java function types.

When writing Java code, use the explicit conversion methods defined in javaapi.FunctionConverters instead.

Using the .asJava extension method on a Scala function produces the most specific possible Java function type:

 scala> import scala.jdk.FunctionConverters._
 scala> val f = (x: Int) => x + 1

 scala> val jf1 = f.asJava
 jf1: java.util.function.IntUnaryOperator = ...

More generic Java function types can be created using the corresponding asJavaXYZ extension method:

 scala> val jf2 = f.asJavaFunction
 jf2: java.util.function.Function[Int,Int] = ...

 scala> val jf3 = f.asJavaUnaryOperator
 jf3: java.util.function.UnaryOperator[Int] = ...

Converting a Java function to Scala is done using the asScala extension method:

 scala> List(1,2,3).map(jf2.asScala)
 res1: List[Int] = List(2, 3, 4)

Attributes

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Supertypes
class Object
trait Matchable
class Any
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Implicits

Inherited implicits

implicit def enrichAsJavaBiConsumer[T, U](sf: (T, U) => Unit): RichFunction2AsBiConsumer[T, U]

Attributes

Inherited from:
Priority2FunctionExtensions
implicit def enrichAsJavaBiFunction[T, U, R](sf: (T, U) => R): RichFunction2AsBiFunction[T, U, R]

Attributes

Inherited from:
Priority3FunctionExtensions
implicit def enrichAsJavaBiPredicate[T, U](sf: (T, U) => Boolean): RichFunction2AsBiPredicate[T, U]

Attributes

Inherited from:
Priority2FunctionExtensions
implicit def enrichAsJavaBinaryOperator[T, A1, A2](sf: (T, A1) => A2)(implicit evA1: A1 =:= T, evA2: A2 =:= T): RichFunction2AsBinaryOperator[T]

Attributes

Inherited from:
Priority1FunctionExtensions
implicit def enrichAsJavaConsumer[T](sf: T => Unit): RichFunction1AsConsumer[T]

Attributes

Inherited from:
Priority1FunctionExtensions
implicit def enrichAsJavaDoubleFunction[A0, R](sf: A0 => R)(implicit evA0: A0 =:= Double): RichFunction1AsDoubleFunction[R]

Attributes

Inherited from:
Priority1FunctionExtensions
implicit def enrichAsJavaFunction[T, R](sf: T => R): RichFunction1AsFunction[T, R]

Attributes

Inherited from:
Priority2FunctionExtensions
implicit def enrichAsJavaIntConsumer[A0](sf: A0 => Unit)(implicit evA0: A0 =:= Int): RichFunction1AsIntConsumer

Attributes

Inherited from:
Priority0FunctionExtensions
implicit def enrichAsJavaIntFunction[A0, R](sf: A0 => R)(implicit evA0: A0 =:= Int): RichFunction1AsIntFunction[R]

Attributes

Inherited from:
Priority1FunctionExtensions
implicit def enrichAsJavaIntPredicate[A0](sf: A0 => Boolean)(implicit evA0: A0 =:= Int): RichFunction1AsIntPredicate

Attributes

Inherited from:
Priority0FunctionExtensions
implicit def enrichAsJavaIntSupplier(sf: () => Int): RichFunction0AsIntSupplier

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Inherited from:
Priority0FunctionExtensions
implicit def enrichAsJavaLongConsumer[A0](sf: A0 => Unit)(implicit evA0: A0 =:= Long): RichFunction1AsLongConsumer

Attributes

Inherited from:
Priority0FunctionExtensions
implicit def enrichAsJavaLongFunction[A0, R](sf: A0 => R)(implicit evA0: A0 =:= Long): RichFunction1AsLongFunction[R]

Attributes

Inherited from:
Priority1FunctionExtensions
implicit def enrichAsJavaObjDoubleConsumer[T, A1](sf: (T, A1) => Unit)(implicit evA1: A1 =:= Double): RichFunction2AsObjDoubleConsumer[T]

Attributes

Inherited from:
Priority1FunctionExtensions
implicit def enrichAsJavaObjIntConsumer[T, A1](sf: (T, A1) => Unit)(implicit evA1: A1 =:= Int): RichFunction2AsObjIntConsumer[T]

Attributes

Inherited from:
Priority1FunctionExtensions
implicit def enrichAsJavaObjLongConsumer[T, A1](sf: (T, A1) => Unit)(implicit evA1: A1 =:= Long): RichFunction2AsObjLongConsumer[T]

Attributes

Inherited from:
Priority1FunctionExtensions
implicit def enrichAsJavaPredicate[T](sf: T => Boolean): RichFunction1AsPredicate[T]

Attributes

Inherited from:
Priority1FunctionExtensions
implicit def enrichAsJavaSupplier[T](sf: () => T): RichFunction0AsSupplier[T]

Attributes

Inherited from:
Priority1FunctionExtensions
implicit def enrichAsJavaToIntBiFunction[T, U](sf: (T, U) => Int): RichFunction2AsToIntBiFunction[T, U]

Attributes

Inherited from:
Priority2FunctionExtensions
implicit def enrichAsJavaUnaryOperator[T, A1](sf: T => A1)(implicit evA1: A1 =:= T): RichFunction1AsUnaryOperator[T]

Attributes

Inherited from:
Priority1FunctionExtensions
implicit def enrichAsScalaFromBiFunction[T, U, R](jf: BiFunction[T, U, R]): RichBiFunctionAsFunction2[T, U, R]

Attributes

Inherited from:
Priority0FunctionExtensions
implicit def enrichAsScalaFromFunction[T, R](jf: Function[T, R]): RichFunctionAsFunction1[T, R]

Attributes

Inherited from:
Priority0FunctionExtensions
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Copyright (c) 2002-2025, LAMP/EPFL
Copyright (c) 2002-2025, LAMP/EPFL