java.util.function

Interface Function<T,R>

Type Parameters:

T - type of the argument

R - type of the return value

All Known Subinterfaces:

UnaryOperator<T>

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface Function<T,R>

See the official Java API doc for details.

Method Summary

Modifier and Type	Method and Description
default <V> Function<T,V>	andThen(Function<? super R,? extends V> after)
R	apply(T t)
default <V> Function<V,R>	compose(Function<? super V,? extends T> before)
static <T> Function<T,T>	identity()

Method Detail

identity

static <T> Function<T,T> identity()

apply

R apply(T t)

andThen

default <V> Function<T,V> andThen(Function<? super R,? extends V> after)

compose

default <V> Function<V,R> compose(Function<? super V,? extends T> before)