Uses of Class
java.util.function.Function

Packages that use Function

Package	Description
java.util
java.util.function
java.util.stream

Uses of Function in java.util

Methods in java.util with parameters of type Function

Modifier and Type	Method and Description
static <T,U extends Comparable<? super U>> Comparator<T>	Comparator.comparing(Function<? super T,? extends U> keyExtractor)
static <T,U> Comparator<T>	Comparator.comparing(Function<? super T,? extends U> keyExtractor, Comparator<? super U> keyComparator)
default V	Map.computeIfAbsent(K key, Function<? super K,? extends V> remappingFunction)
<U> Optional<U>	Optional.flatMap(Function<? super T,Optional<U>> mapper)
<U> Optional<U>	Optional.map(Function<? super T,? extends U> mapper)
default <U extends Comparable<? super U>> Comparator<T>	Comparator.thenComparing(Function<? super T,? extends U> keyExtractor)
default <U> Comparator<T>	Comparator.thenComparing(Function<? super T,? extends U> keyExtractor, Comparator<? super U> keyComparator)

Uses of Function in java.util.function

Subinterfaces of Function in java.util.function

Modifier and Type	Interface and Description
interface	UnaryOperator<T> See the official Java API doc for details.

Methods in java.util.function that return Function

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

Methods in java.util.function with parameters of type Function

Modifier and Type	Method and Description
default <V> Function<T,V>	Function.andThen(Function<? super R,? extends V> after)
default <V> BiFunction<T,U,V>	BiFunction.andThen(Function<? super R,? extends V> after)
default <V> Function<V,R>	Function.compose(Function<? super V,? extends T> before)

Uses of Function in java.util.stream

Methods in java.util.stream that return Function

Modifier and Type	Method and Description
Function<A,R>	Collector.finisher()

Methods in java.util.stream with parameters of type Function

Modifier and Type	Method and Description
static <T,A,R,RR> Collector<T,A,RR>	Collectors.collectingAndThen(Collector<T,A,R> downstream, Function<R,RR> finisher)
<R> Stream<R>	Stream.flatMap(Function<? super T,? extends Stream<? extends R>> mapper)
DoubleStream	Stream.flatMapToDouble(Function<? super T,? extends DoubleStream> mapper)
IntStream	Stream.flatMapToInt(Function<? super T,? extends IntStream> mapper)
LongStream	Stream.flatMapToLong(Function<? super T,? extends LongStream> mapper)
static <T,K> Collector<T,?,Map<K,List<T>>>	Collectors.groupingBy(Function<? super T,? extends K> classifier)
static <T,K,A,D> Collector<T,?,Map<K,D>>	Collectors.groupingBy(Function<? super T,? extends K> classifier, Collector<? super T,A,D> downstream)
static <T,K,D,A,M extends Map<K,D>> Collector<T,?,M>	Collectors.groupingBy(Function<? super T,? extends K> classifier, Supplier<M> mapFactory, Collector<? super T,A,D> downstream)
<R> Stream<R>	Stream.map(Function<? super T,? extends R> mapper)
static <T,U,A,R> Collector<T,?,R>	Collectors.mapping(Function<? super T,? extends U> mapper, Collector<? super U,A,R> downstream)
static <T,A,R> Collector<T,A,R>	Collector.of(Supplier<A> supplier, BiConsumer<A,T> accumulator, BinaryOperator<A> combiner, Function<A,R> finisher, Collector.Characteristics... characteristics)
static <T,U> Collector<T,?,U>	Collectors.reducing(U identity, Function<? super T,? extends U> mapper, BinaryOperator<U> op)
static <T,K,U> Collector<T,?,Map<K,U>>	Collectors.toMap(Function<? super T,? extends K> keyMapper, Function<? super T,? extends U> valueMapper)
static <T,K,U> Collector<T,?,Map<K,U>>	Collectors.toMap(Function<? super T,? extends K> keyMapper, Function<? super T,? extends U> valueMapper)
static <T,K,U> Collector<T,?,Map<K,U>>	Collectors.toMap(Function<? super T,? extends K> keyMapper, Function<? super T,? extends U> valueMapper, BinaryOperator<U> mergeFunction)
static <T,K,U> Collector<T,?,Map<K,U>>	Collectors.toMap(Function<? super T,? extends K> keyMapper, Function<? super T,? extends U> valueMapper, BinaryOperator<U> mergeFunction)
static <T,K,U,M extends Map<K,U>> Collector<T,?,M>	Collectors.toMap(Function<? super T,? extends K> keyMapper, Function<? super T,? extends U> valueMapper, BinaryOperator<U> mergeFunction, Supplier<M> mapSupplier)
static <T,K,U,M extends Map<K,U>> Collector<T,?,M>	Collectors.toMap(Function<? super T,? extends K> keyMapper, Function<? super T,? extends U> valueMapper, BinaryOperator<U> mergeFunction, Supplier<M> mapSupplier)