List of standard Java Runtime Library functional interfaces by signature

Parameter Types | Return Type | Interface |
–––––––– | ———– | ——— |
() | void | Runnable |
() | T | Supplier |
() | boolean | BooleanSupplier |
() | int | IntSupplier |
() | long | LongSupplier |
() | double | DoubleSupplier |
(T) | void | Consumer<T> |
(T) | T | UnaryOperator<T> |
(T) | R | Function<T,R> |
(T) | boolean | Predicate<T> |
(T) | int | ToIntFunction<T> |
(T) | long | ToLongFunction<T> |
(T) | double | ToDoubleFunction<T> |
(T, T) | T | BinaryOperator<T> |
(T, U) | void | BiConsumer<T,U> |
(T, U) | R | BiFunction<T,U,R> |
(T, U) | boolean | BiPredicate<T,U> |
(T, U) | int | ToIntBiFunction<T,U> |
(T, U) | long | ToLongBiFunction<T,U> |
(T, U) | double | ToDoubleBiFunction<T,U> |
(T, int) | void | ObjIntConsumer<T> |
(T, long) | void | ObjLongConsumer<T> |
(T, double) | void | ObjDoubleConsumer<T> |
(int) | void | IntConsumer |
(int) | R | IntFunction<R> |
(int) | boolean | IntPredicate |
(int) | int | IntUnaryOperator |
(int) | long | IntToLongFunction |
(int) | double | IntToDoubleFunction |
(int, int) | int | IntBinaryOperator |
(long) | void | LongConsumer |
(long) | R | LongFunction<R> |
(long) | boolean | LongPredicate |
(long) | int | LongToIntFunction |
(long) | long | LongUnaryOperator |
(long) | double | LongToDoubleFunction |
(long, long) | long | LongBinaryOperator |
(double) | void | DoubleConsumer |
(double) | R | DoubleFunction<R> |
(double) | boolean | DoublePredicate |
(double) | int | DoubleToIntFunction |
(double) | long | DoubleToLongFunction |
(double) | double | DoubleUnaryOperator |
(double, double) | double | DoubleBinaryOperator |