Java8 の java.util.function package と Scala の対応表

現状*1 java.util.function packageには43個interfaceがあるようです。

http://download.java.net/jdk8/docs/api/java/util/function/package-summary.html

とりあえず対応表だけ作ったら力尽きたので、後で気が向いたときに、java.util.functionの残念なところと、Scalaのspecialized annotationについて書く・・・

Java	Scala
BiConsumer	Function2[A, B, Unit]
BiFunction	Function2[A, B, C]
BinaryOperator	Function2[A, A, A]
BiPredicate	Function2[A, B, Boolean]
BooleanSupplier	Function0[Boolean]
Consumer	Function1[A, Unit]
DoubleBinaryOperator	Function2[Double, Double, Double]
DoubleConsumer	Function1[Double, Unit]
DoubleFunction	Function1[Double, A]
DoublePredicate	Function1[Double, Boolean]
DoubleSupplier	Function0[Double]
DoubleToIntFunction	Function1[Double, Int]
DoubleToLongFunction	Function1[Double, Long]
DoubleUnaryOperator	Function1[Double, Double]
Function	Function1[A, B]
IntBinaryOperator	Function2[Int, Int, Int]
IntConsumer	Function1[Int, Unit]
IntFunction	Function1[Int, A]
IntPredicate	Function1[Int, Boolean]
IntSupplier	Function0[Int]
IntToDoubleFunction	Function1[Int, Double]
IntToLongFunction	Function1[Int, Long]
IntUnaryOperator	Function1[Int, Int]
LongBinaryOperator	Function2[Long, Long, Long]
LongConsumer	Function1[Long, Unit]
LongFunction	Function1[Long, A]
LongPredicate	Function1[Long, Boolean]
LongSupplier	Function0[Long]
LongToDoubleFunction	Function1[Long, Double]
LongToIntFunction	Function1[Long, Int]
LongUnaryOperator	Function1[Long, Long]
ObjDoubleConsumer	Function2[T, Double, Unit]
ObjIntConsumer	Function2[T, Int, Unit]
ObjLongConsumer	Function2[T, Long, Unit]
Predicate	Function1[A, Boolean]
Supplier	Function0[A]
ToDoubleBiFunction	Function2[A, B, Double]
ToDoubleFunction	Function1[A, Double]
ToIntBiFunction	Function2[A, B, Int]
ToIntFunction	Function1[A, Int]
ToLongBiFunction	Function2[A, B, Long]
ToLongFunction	Function1[A, Long]
UnaryOperator	Function1[A, A]

*1:もう仕様が完全に固まったのか、まだ変更ありえるのか？というような事情知らない