Uses of Interface
java8.util.function.Supplier

Packages that use Supplier

Package	Description
java8.util	Provides some of the new java.util classes and implementations of static and default interface methods added in Java 8.
java8.util.concurrent	The Java 7 and Java 8 utility classes commonly used in concurrent programming.
java8.util.stream	Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.

Uses of Supplier in java8.util

Methods in java8.util with parameters of type Supplier

Modifier and Type	Method and Description
Optional<T>	Optional.or(Supplier<Optional<T>> supplier) If a value is present, returns an Optional describing the value, otherwise returns an Optional produced by the supplying function.
T	Optional.orElseGet(Supplier<? extends T> supplier) If a value is present, returns the value, otherwise returns the result produced by the supplying function.
<X extends Throwable> long	OptionalLong.orElseThrow(Supplier<? extends X> exceptionSupplier) If a value is present, returns the value, otherwise throws an exception produced by the exception supplying function.
<X extends Throwable> int	OptionalInt.orElseThrow(Supplier<? extends X> exceptionSupplier) If a value is present, returns the value, otherwise throws an exception produced by the exception supplying function.
<X extends Throwable> double	OptionalDouble.orElseThrow(Supplier<? extends X> exceptionSupplier) If a value is present, returns the value, otherwise throws an exception produced by the exception supplying function.
<X extends Throwable> T	Optional.orElseThrow(Supplier<? extends X> exceptionSupplier) If a value is present, returns the value, otherwise throws an exception produced by the exception supplying function.
static <T> T	Objects.requireNonNull(T obj, Supplier<String> messageSupplier) Checks that the specified object reference is not null and throws a customized NullPointerException if it is.

Uses of Supplier in java8.util.concurrent

Methods in java8.util.concurrent with parameters of type Supplier

Modifier and Type	Method and Description
static <U> CompletableFuture<U>	CompletableFuture.supplyAsync(Supplier<U> supplier) Returns a new CompletableFuture that is asynchronously completed by a task running in the ForkJoinPool.commonPool() with the value obtained by calling the given Supplier.
static <U> CompletableFuture<U>	CompletableFuture.supplyAsync(Supplier<U> supplier, Executor executor) Returns a new CompletableFuture that is asynchronously completed by a task running in the given executor with the value obtained by calling the given Supplier.

Uses of Supplier in java8.util.stream

Methods in java8.util.stream that return Supplier

Modifier and Type	Method and Description
Supplier<A>	Collector.supplier() A function that creates and returns a new mutable result container.

Methods in java8.util.stream with parameters of type Supplier

Modifier and Type	Method and Description
<R> R	Stream.collect(Supplier<R> supplier, BiConsumer<R,? super T> accumulator, BiConsumer<R,R> combiner) Performs a mutable reduction operation on the elements of this stream.
<R> R	DoubleStream.collect(Supplier<R> supplier, ObjDoubleConsumer<R> accumulator, BiConsumer<R,R> combiner) Performs a mutable reduction operation on the elements of this stream.
<R> R	IntStream.collect(Supplier<R> supplier, ObjIntConsumer<R> accumulator, BiConsumer<R,R> combiner) Performs a mutable reduction operation on the elements of this stream.
<R> R	LongStream.collect(Supplier<R> supplier, ObjLongConsumer<R> accumulator, BiConsumer<R,R> combiner) Performs a mutable reduction operation on the elements of this stream.
static DoubleStream	StreamSupport.doubleStream(Supplier<? extends Spliterator.OfDouble> supplier, int characteristics, boolean parallel) Creates a new sequential or parallel DoubleStream from a Supplier of Spliterator.OfDouble.
static <T> Stream<T>	StreamSupport.generate(Supplier<? extends T> s) Deprecated. Use RefStreams.generate(Supplier) instead
static <T> Stream<T>	RefStreams.generate(Supplier<? extends T> s) Returns an infinite sequential unordered Stream where each element is generated by the provided Supplier.
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) Returns a Collector implementing a cascaded "group by" operation on input elements of type T, grouping elements according to a classification function, and then performing a reduction operation on the values associated with a given key using the specified downstream Collector.
static <T,K,A,D,M extends ConcurrentMap<K,D>> Collector<T,?,M>	Collectors.groupingByConcurrent(Function<? super T,? extends K> classifier, Supplier<M> mapFactory, Collector<? super T,A,D> downstream) Returns a concurrent Collector implementing a cascaded "group by" operation on input elements of type T, grouping elements according to a classification function, and then performing a reduction operation on the values associated with a given key using the specified downstream Collector.
static IntStream	StreamSupport.intStream(Supplier<? extends Spliterator.OfInt> supplier, int characteristics, boolean parallel) Creates a new sequential or parallel IntStream from a Supplier of Spliterator.OfInt.
static LongStream	StreamSupport.longStream(Supplier<? extends Spliterator.OfLong> supplier, int characteristics, boolean parallel) Creates a new sequential or parallel LongStream from a Supplier of Spliterator.OfLong.
static <T,A,R> Collector<T,A,R>	Collectors.of(Supplier<A> supplier, BiConsumer<A,T> accumulator, BinaryOperator<A> combiner, Function<A,R> finisher, Collector.Characteristics... characteristics) Returns a new Collector described by the given supplier, accumulator, combiner, and finisher functions.
static <T,R> Collector<T,R,R>	Collectors.of(Supplier<R> supplier, BiConsumer<R,T> accumulator, BinaryOperator<R> combiner, Collector.Characteristics... characteristics) Returns a new Collector described by the given supplier, accumulator, and combiner functions.
static <T> Stream<T>	StreamSupport.stream(Supplier<? extends Spliterator<T>> supplier, int characteristics, boolean parallel) Creates a new sequential or parallel Stream from a Supplier of Spliterator.
static <T,C extends Collection<T>> Collector<T,?,C>	Collectors.toCollection(Supplier<C> collectionFactory) Returns a Collector that accumulates the input elements into a new Collection, in encounter order.
static <T,K,U,M extends ConcurrentMap<K,U>> Collector<T,?,M>	Collectors.toConcurrentMap(Function<? super T,? extends K> keyMapper, Function<? super T,? extends U> valueMapper, BinaryOperator<U> mergeFunction, Supplier<M> mapSupplier) Returns a concurrent Collector that accumulates elements into a ConcurrentMap whose keys and values are the result of applying the provided mapping functions to the input elements.
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) Returns a Collector that accumulates elements into a Map whose keys and values are the result of applying the provided mapping functions to the input elements.