Classe « Collectors »

Informations générales

Héritage

java.lang.Object
    java.util.stream.Collectors

Définition

public final class Collectors extends java.lang.Object

Description

A venir.

Liste des attributs

Tous les attributs Attributs d'instance Attributs statiques Attributs dépréciés

Qualificateurs	Type	Nom	Description

Liste des constructeurs

Constructeurs Constructeurs dépréciés

Constructeur	Description

Liste des propriétés (getters/setters)

Propriétés Propriétés dépréciées

Qualificateurs	Type	Nom	R/W

Propriétés héritées de la classe java.lang.Object

class

Liste des méthodes

Toutes les méthodes Méthodes d'instance Méthodes statiques Méthodes concrètes Méthodes abstraites Méthodes dépréciées

Qualificateurs	Type de retour	Prototype de la méthode
public static <T>	Collector<T, ?, java.lang.Double>	averagingDouble( ToDoubleFunction<? super T> mapper )
public static <T>	Collector<T, ?, java.lang.Double>	averagingInt( ToIntFunction<? super T> mapper )
public static <T>	Collector<T, ?, java.lang.Double>	averagingLong( ToLongFunction<? super T> mapper )
public static <T, A, R, RR>	Collector<T, A, RR>	collectingAndThen( Collector<T, A, R> downstream, Function<R, RR> finisher )
public static <T>	Collector<T, ?, java.lang.Long>	counting()
public static <T, A, R>	Collector<T, ?, R>	filtering( Predicate<? super T> predicate, Collector<? super T, A, R> downstream )
public static <T, U, A, R>	Collector<T, ?, R>	flatMapping( Function<? super T, ? extends java.util.stream.Stream<? extends U>> mapper, Collector<? super U, A, R> downstream )
public static <T, K>	Collector<T, ?, java.util.Map<K, java.util.List<T>>>	groupingBy( Function<? super T, ? extends K> classifier )
public static <T, K, A, D>	Collector<T, ?, java.util.Map<K, D>>	groupingBy( Function<? super T, ? extends K> classifier, Collector<? super T, A, D> downstream )
public static <T, K, D, A, M>	Collector<T, ?, M>	groupingBy( Function<? super T, ? extends K> classifier, Supplier<M> mapFactory, Collector<? super T, A, D> downstream )
public static <T, K, A, D, M>	Collector<T, ?, M>	groupingByConcurrent( Function<? super T, ? extends K> classifier, Supplier<M> mapFactory, Collector<? super T, A, D> downstream )
public static <T, K, A, D>	Collector<T, ?, java.util.concurrent.ConcurrentMap<K, D>>	groupingByConcurrent( Function<? super T, ? extends K> classifier, Collector<? super T, A, D> downstream )
public static <T, K>	Collector<T, ?, java.util.concurrent.ConcurrentMap<K, java.util.List<T>>>	groupingByConcurrent( Function<? super T, ? extends K> classifier )
public static	Collector<java.lang.CharSequence, ?, java.lang.String>	joining()
public static	Collector<java.lang.CharSequence, ?, java.lang.String>	joining( CharSequence delimiter, CharSequence prefix, CharSequence suffix )
public static	Collector<java.lang.CharSequence, ?, java.lang.String>	joining( CharSequence delimiter )
public static <T, U, A, R>	Collector<T, ?, R>	mapping( Function<? super T, ? extends U> mapper, Collector<? super U, A, R> downstream )
public static <T>	Collector<T, ?, java.util.Optional<T>>	maxBy( Comparator<? super T> comparator )
public static <T>	Collector<T, ?, java.util.Optional<T>>	minBy( Comparator<? super T> comparator )
public static <T>	Collector<T, ?, java.util.Map<java.lang.Boolean, java.util.List<T>>>	partitioningBy( Predicate<? super T> predicate )
public static <T, D, A>	Collector<T, ?, java.util.Map<java.lang.Boolean, D>>	partitioningBy( Predicate<? super T> predicate, Collector<? super T, A, D> downstream )
public static <T>	Collector<T, ?, T>	reducing( T identity, BinaryOperator<T> op )
public static <T>	Collector<T, ?, java.util.Optional<T>>	reducing( BinaryOperator<T> op )
public static <T, U>	Collector<T, ?, U>	reducing( U identity, Function<? super T, ? extends U> mapper, BinaryOperator<U> op )
public static <T>	Collector<T, ?, java.util.DoubleSummaryStatistics>	summarizingDouble( ToDoubleFunction<? super T> mapper )
public static <T>	Collector<T, ?, java.util.IntSummaryStatistics>	summarizingInt( ToIntFunction<? super T> mapper )
public static <T>	Collector<T, ?, java.util.LongSummaryStatistics>	summarizingLong( ToLongFunction<? super T> mapper )
public static <T>	Collector<T, ?, java.lang.Double>	summingDouble( ToDoubleFunction<? super T> mapper )
public static <T>	Collector<T, ?, java.lang.Integer>	summingInt( ToIntFunction<? super T> mapper )
public static <T>	Collector<T, ?, java.lang.Long>	summingLong( ToLongFunction<? super T> mapper )
public static <T, R1, R2, R>	Collector<T, ?, R>	teeing( Collector<? super T, ?, R1> downstream1, Collector<? super T, ?, R2> downstream2, BiFunction<? super R1, ? super R2, R> merger )
public static <T, C>	Collector<T, ?, C>	toCollection( Supplier<C> collectionFactory )
public static <T, K, U>	Collector<T, ?, java.util.concurrent.ConcurrentMap<K, U>>	toConcurrentMap( Function<? super T, ? extends K> keyMapper, Function<? super T, ? extends U> valueMapper )
public static <T, K, U>	Collector<T, ?, java.util.concurrent.ConcurrentMap<K, U>>	toConcurrentMap( Function<? super T, ? extends K> keyMapper, Function<? super T, ? extends U> valueMapper, BinaryOperator<U> mergeFunction )
public static <T, K, U, M>	Collector<T, ?, M>	toConcurrentMap( Function<? super T, ? extends K> keyMapper, Function<? super T, ? extends U> valueMapper, BinaryOperator<U> mergeFunction, Supplier<M> mapFactory )
public static <T>	Collector<T, ?, java.util.List<T>>	toList()
public static <T, K, U>	Collector<T, ?, java.util.Map<K, U>>	toMap( Function<? super T, ? extends K> keyMapper, Function<? super T, ? extends U> valueMapper )
public static <T, K, U, M>	Collector<T, ?, M>	toMap( Function<? super T, ? extends K> keyMapper, Function<? super T, ? extends U> valueMapper, BinaryOperator<U> mergeFunction, Supplier<M> mapFactory )
public static <T, K, U>	Collector<T, ?, java.util.Map<K, U>>	toMap( Function<? super T, ? extends K> keyMapper, Function<? super T, ? extends U> valueMapper, BinaryOperator<U> mergeFunction )
public static <T>	Collector<T, ?, java.util.Set<T>>	toSet()
public static <T>	Collector<T, ?, java.util.List<T>>	toUnmodifiableList()
public static <T, K, U>	Collector<T, ?, java.util.Map<K, U>>	toUnmodifiableMap( Function<? super T, ? extends K> keyMapper, Function<? super T, ? extends U> valueMapper )
public static <T, K, U>	Collector<T, ?, java.util.Map<K, U>>	toUnmodifiableMap( Function<? super T, ? extends K> keyMapper, Function<? super T, ? extends U> valueMapper, BinaryOperator<U> mergeFunction )
public static <T>	Collector<T, ?, java.util.Set<T>>	toUnmodifiableSet()