Uses of Interface
java.util.function.ToLongFunction
Packages that use ToLongFunction
Package
Description
Contains the collections framework, some internationalization support classes,
a service loader, properties, random number generation, string parsing
and scanning classes, base64 encoding and decoding, a bit array, and
several miscellaneous utility classes.
Utility classes commonly useful in concurrent programming.
Classes to support functional-style operations on streams of elements, such
as map-reduce transformations on collections.
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Uses of ToLongFunction in java.util
Methods in java.util with parameters of type ToLongFunctionModifier and TypeMethodDescriptionstatic <T> Comparator<T>Comparator.comparingLong(ToLongFunction<? super T> keyExtractor) Accepts a function that extracts alongsort key from a typeT, and returns aComparator<T>that compares by that sort key.default Comparator<T>Comparator.thenComparingLong(ToLongFunction<? super T> keyExtractor) Returns a lexicographic-order comparator with a function that extracts alongsort key. -
Uses of ToLongFunction in java.util.concurrent
Methods in java.util.concurrent with parameters of type ToLongFunctionModifier and TypeMethodDescriptionlongConcurrentHashMap.reduceEntriesToLong(long parallelismThreshold, ToLongFunction<Map.Entry<K, V>> transformer, long basis, LongBinaryOperator reducer) Returns the result of accumulating the given transformation of all entries using the given reducer to combine values, and the given basis as an identity value.longConcurrentHashMap.reduceKeysToLong(long parallelismThreshold, ToLongFunction<? super K> transformer, long basis, LongBinaryOperator reducer) Returns the result of accumulating the given transformation of all keys using the given reducer to combine values, and the given basis as an identity value.longConcurrentHashMap.reduceValuesToLong(long parallelismThreshold, ToLongFunction<? super V> transformer, long basis, LongBinaryOperator reducer) Returns the result of accumulating the given transformation of all values using the given reducer to combine values, and the given basis as an identity value. -
Uses of ToLongFunction in java.util.stream
Methods in java.util.stream with parameters of type ToLongFunctionModifier and TypeMethodDescriptionCollectors.averagingLong(ToLongFunction<? super T> mapper) Returns aCollectorthat produces the arithmetic mean of a long-valued function applied to the input elements.Stream.mapToLong(ToLongFunction<? super T> mapper) Returns aLongStreamconsisting of the results of applying the given function to the elements of this stream.static <T> Collector<T,?, LongSummaryStatistics> Collectors.summarizingLong(ToLongFunction<? super T> mapper) Returns aCollectorwhich applies anlong-producing mapping function to each input element, and returns summary statistics for the resulting values.Collectors.summingLong(ToLongFunction<? super T> mapper) Returns aCollectorthat produces the sum of a long-valued function applied to the input elements.