Uses of Interface java.util.function.ToLongFunction

Uses of Interface
java.util.function.ToLongFunction

Packages that use ToLongFunction

Package	Description
java.util	Contains the collections framework, legacy collection classes, event model, date and time facilities, internationalization, and miscellaneous utility classes (a string tokenizer, a random-number generator, and a bit array).
java.util.concurrent	Utility classes commonly useful in concurrent programming.
java.util.stream	Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.

Uses of ToLongFunction in java.util

Methods in java.util with parameters of type ToLongFunction

Modifier and Type	Method and Description
`static <T> Comparator<T>`	Comparator.`comparingLong(ToLongFunction<? super T> keyExtractor)` Accepts a function that extracts a `long` sort key from a type `T`, and returns a `Comparator<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 a `long` sort key.

Uses of ToLongFunction in java.util.concurrent

Methods in java.util.concurrent with parameters of type ToLongFunction

Modifier and Type	Method and Description
`long`	ConcurrentHashMap.`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.
`long`	ConcurrentHashMap.`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.
`long`	ConcurrentHashMap.`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 ToLongFunction

Modifier and Type	Method and Description
`static <T> Collector<T,?,Double>`	Collectors.`averagingLong(ToLongFunction<? super T> mapper)` Returns a `Collector` that produces the arithmetic mean of a long-valued function applied to the input elements.
`LongStream`	Stream.`mapToLong(ToLongFunction<? super T> mapper)` Returns a `LongStream` consisting 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 a `Collector` which applies an `long`-producing mapping function to each input element, and returns summary statistics for the resulting values.
`static <T> Collector<T,?,Long>`	Collectors.`summingLong(ToLongFunction<? super T> mapper)` Returns a `Collector` that produces the sum of a long-valued function applied to the input elements.