java.lang.Object
- io.vavr.collection.HashSet<T>

Type Parameters:

T - Component type

All Implemented Interfaces:

Foldable<T>, Set<T>, Traversable<T>, Function1<T,java.lang.Boolean>, Value<T>, java.io.Serializable, java.lang.Iterable<T>, java.util.function.Function<T,java.lang.Boolean>
```
public final class HashSet<T>
extends java.lang.Object
implements Set<T>, java.io.Serializable
```
An immutable HashSet implementation.

See Also:

Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`private static class`	`HashSet.SerializationProxy<T>`	A serialization proxy which, in this context, is used to deserialize immutable, linked Lists with final instance fields.

Field Summary

Fields
Modifier and Type Field Description

private static HashSet<?> EMPTY

private static long serialVersionUID

private HashArrayMappedTrie<T,T> tree

Constructor Summary

Constructors
Modifier Constructor Description

private HashSet(HashArrayMappedTrie<T,T> tree)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`HashSet<T>`	`add(T element)`	Returns a new set containing all elements of this set plus the given element, if it was not already present.
`HashSet<T>`	`addAll(@NonNull java.lang.Iterable<? extends T> elements)`	Returns a new set containing all elements of this set plus the given elements, excluding duplicates.
`private static <T> HashArrayMappedTrie<T,T>`	`addAll(HashArrayMappedTrie<T,T> initial, java.lang.Iterable<? extends T> additional)`
`<R> HashSet<R>`	`collect(@NonNull PartialFunction<? super T,? extends R> partialFunction)`	Applies a `PartialFunction` to all elements that are defined for it and collects the results.
`static <T> java.util.stream.Collector<T,java.util.ArrayList<T>,HashSet<T>>`	`collector()`	Returns a `Collector` which may be used in conjunction with `Stream.collect(java.util.stream.Collector)` to obtain a `HashSet`.
`boolean`	`contains(T element)`	Shortcut for `exists(e -> Objects.equals(e, element))`, tests if the given `element` is contained.
`HashSet<T>`	`diff(@NonNull Set<? extends T> elements)`	Returns a new set containing all elements of this set except those in the given set.
`HashSet<T>`	`distinct()`	Returns a new `Traversable` containing the elements of this instance with all duplicates removed.
`HashSet<T>`	`distinctBy(@NonNull java.util.Comparator<? super T> comparator)`	Returns a new `Traversable` containing the elements of this instance without duplicates, as determined by the given `comparator`.
`<U> HashSet<T>`	`distinctBy(@NonNull java.util.function.Function<? super T,? extends U> keyExtractor)`	Returns a new `Traversable` containing the elements of this instance without duplicates, based on keys extracted from elements using `keyExtractor`.
`HashSet<T>`	`drop(int n)`	Returns a new `Traversable` without the first `n` elements, or an empty instance if this contains fewer than `n` elements.
`HashSet<T>`	`dropRight(int n)`	Returns a new `Traversable` without the last `n` elements, or an empty instance if this contains fewer than `n` elements.
`HashSet<T>`	`dropUntil(@NonNull java.util.function.Predicate<? super T> predicate)`	Returns a new `Traversable` starting from the first element that satisfies the given `predicate`, dropping all preceding elements.
`HashSet<T>`	`dropWhile(@NonNull java.util.function.Predicate<? super T> predicate)`	Returns a new `Traversable` starting from the first element that does not satisfy the given `predicate`, dropping all preceding elements.
`static <T> HashSet<T>`	`empty()`	Returns the empty HashSet.
`boolean`	`equals(java.lang.Object o)`	Determines whether this collection is equal to the given object.
`static <T> HashSet<T>`	`fill(int n, @NonNull java.util.function.Supplier<? extends T> s)`	Returns a HashSet containing tuples returned by `n` calls to a given Supplier `s`.
`HashSet<T>`	`filter(@NonNull java.util.function.Predicate<? super T> predicate)`	Returns a new traversable containing only the elements that satisfy the given predicate.
`<U> HashSet<U>`	`flatMap(@NonNull java.util.function.Function<? super T,? extends java.lang.Iterable<? extends U>> mapper)`	Transforms each element of this Traversable into an `Iterable` of elements and flattens the resulting iterables into a single Traversable.
`<U> U`	`foldRight(U zero, @NonNull java.util.function.BiFunction<? super T,? super U,? extends U> f)`	Folds the elements of this structure from the right, starting with the given `zero` value and successively applying the `combine` function to each element.
`<C> Map<C,HashSet<T>>`	`groupBy(@NonNull java.util.function.Function<? super T,? extends C> classifier)`	Groups elements of this `Traversable` based on a classifier function.
`Iterator<HashSet<T>>`	`grouped(int size)`	Splits this `Traversable` into consecutive blocks of the given size.
`boolean`	`hasDefiniteSize()`	Indicates whether this `Traversable` has a known finite size.
`int`	`hashCode()`	Returns the hash code of this collection.
`T`	`head()`	Returns the first element of this non-empty `Traversable`.
`Option<T>`	`headOption()`	Returns the first element of this `Traversable` as an `Option`.
`HashSet<T>`	`init()`	Returns all elements of this Traversable except the last one.
`Option<HashSet<T>>`	`initOption()`	Returns all elements of this Traversable except the last one, wrapped in an `Option`.
`HashSet<T>`	`intersect(@NonNull Set<? extends T> elements)`	Returns a new set containing only the elements present in both this set and the given set.
`boolean`	`isAsync()`	A `HashSet` is computed synchronously.
`boolean`	`isEmpty()`	Checks if this Traversable contains no elements.
`boolean`	`isLazy()`	A `HashSet` is computed eagerly.
`boolean`	`isTraversableAgain()`	Checks if this Traversable can be traversed multiple times without side effects.
`@NonNull Iterator<T>`	`iterator()`	Returns an iterator over the elements of this Traversable, implemented via `Traversable.head()` and `Traversable.tail()`.
`T`	`last()`	Returns the last element of this Traversable.
`int`	`length()`	Returns the number of elements in this Traversable.
`<U> HashSet<U>`	`map(@NonNull java.util.function.Function<? super T,? extends U> mapper)`	Transforms the elements of this Traversable to a new type, preserving order if defined.
`<U> HashSet<U>`	`mapTo(U value)`	Maps the underlying value to another fixed value.
`HashSet<java.lang.Void>`	`mapToVoid()`	Maps the underlying value to Void
`java.lang.String`	`mkString(java.lang.CharSequence prefix, java.lang.CharSequence delimiter, java.lang.CharSequence suffix)`	Concatenates the string representations of all elements in this Traversable with a prefix, delimiter, and suffix.
`static <T> HashSet<T>`	`narrow(HashSet<? extends T> hashSet)`	Narrows a `HashSet<? extends T>` to `HashSet<T>` via a type-safe cast.
`static <T> HashSet<T>`	`of(T element)`	Returns a singleton `HashSet`, i.e.
`static <T> HashSet<T>`	`of(T @NonNull ... elements)`	Creates a HashSet of the given elements.
`static HashSet<java.lang.Boolean>`	`ofAll(boolean @NonNull ... elements)`	Creates a HashSet from boolean values.
`static HashSet<java.lang.Byte>`	`ofAll(byte @NonNull ... elements)`	Creates a HashSet from byte values.
`static HashSet<java.lang.Character>`	`ofAll(char @NonNull ... elements)`	Creates a HashSet from char values.
`static HashSet<java.lang.Double>`	`ofAll(double @NonNull ... elements)`	Creates a HashSet from double values.
`static HashSet<java.lang.Float>`	`ofAll(float @NonNull ... elements)`	Creates a HashSet from float values.
`static HashSet<java.lang.Integer>`	`ofAll(int @NonNull ... elements)`	Creates a HashSet from int values.
`static HashSet<java.lang.Long>`	`ofAll(long @NonNull ... elements)`	Creates a HashSet from long values.
`static HashSet<java.lang.Short>`	`ofAll(short @NonNull ... elements)`	Creates a HashSet from short values.
`static <T> HashSet<T>`	`ofAll(@NonNull java.lang.Iterable<? extends T> elements)`	Creates a HashSet of the given elements.
`static <T> HashSet<T>`	`ofAll(java.util.stream.Stream<? extends T> javaStream)`	Creates a HashSet that contains the elements of the given `Stream`.
`HashSet<T>`	`orElse(@NonNull java.lang.Iterable<? extends T> other)`	Returns this `Traversable` if it is non-empty; otherwise, returns the given alternative.
`HashSet<T>`	`orElse(@NonNull java.util.function.Supplier<? extends java.lang.Iterable<? extends T>> supplier)`	Returns this `Traversable` if it is non-empty; otherwise, returns the result of evaluating the given supplier.
`Tuple2<HashSet<T>,HashSet<T>>`	`partition(@NonNull java.util.function.Predicate<? super T> predicate)`	Splits this `Traversable` into two partitions according to a predicate.
`HashSet<T>`	`peek(@NonNull java.util.function.Consumer<? super T> action)`	Performs the given `action` on the first element if this is an eager implementation.
`static HashSet<java.lang.Character>`	`range(char from, char toExclusive)`	Creates a HashSet of char numbers starting from `from`, extending to `toExclusive - 1`.
`static HashSet<java.lang.Integer>`	`range(int from, int toExclusive)`	Creates a HashSet of int numbers starting from `from`, extending to `toExclusive - 1`.
`static HashSet<java.lang.Long>`	`range(long from, long toExclusive)`	Creates a HashSet of long numbers starting from `from`, extending to `toExclusive - 1`.
`static HashSet<java.lang.Character>`	`rangeBy(char from, char toExclusive, int step)`	Creates a HashSet of char numbers starting from `from`, extending to `toExclusive - 1`, with `step`.
`static HashSet<java.lang.Double>`	`rangeBy(double from, double toExclusive, double step)`	Creates a HashSet of double numbers starting from `from`, extending to `toExclusive - 1`, with `step`.
`static HashSet<java.lang.Integer>`	`rangeBy(int from, int toExclusive, int step)`	Creates a HashSet of int numbers starting from `from`, extending to `toExclusive - 1`, with `step`.
`static HashSet<java.lang.Long>`	`rangeBy(long from, long toExclusive, long step)`	Creates a HashSet of long numbers starting from `from`, extending to `toExclusive - 1`, with `step`.
`static HashSet<java.lang.Character>`	`rangeClosed(char from, char toInclusive)`	Creates a HashSet of char numbers starting from `from`, extending to `toInclusive`.
`static HashSet<java.lang.Integer>`	`rangeClosed(int from, int toInclusive)`	Creates a HashSet of int numbers starting from `from`, extending to `toInclusive`.
`static HashSet<java.lang.Long>`	`rangeClosed(long from, long toInclusive)`	Creates a HashSet of long numbers starting from `from`, extending to `toInclusive`.
`static HashSet<java.lang.Character>`	`rangeClosedBy(char from, char toInclusive, int step)`	Creates a HashSet of char numbers starting from `from`, extending to `toInclusive`, with `step`.
`static HashSet<java.lang.Double>`	`rangeClosedBy(double from, double toInclusive, double step)`	Creates a HashSet of double numbers starting from `from`, extending to `toInclusive`, with `step`.
`static HashSet<java.lang.Integer>`	`rangeClosedBy(int from, int toInclusive, int step)`	Creates a HashSet of int numbers starting from `from`, extending to `toInclusive`, with `step`.
`static HashSet<java.lang.Long>`	`rangeClosedBy(long from, long toInclusive, long step)`	Creates a HashSet of long numbers starting from `from`, extending to `toInclusive`, with `step`.
`private void`	`readObject(java.io.ObjectInputStream stream)`	`readObject` method for the serialization proxy pattern.
`HashSet<T>`	`reject(@NonNull java.util.function.Predicate<? super T> predicate)`	Returns a new traversable containing only the elements that do not satisfy the given predicate.
`HashSet<T>`	`remove(T element)`	Returns a new set with the given element removed, if it was present.
`HashSet<T>`	`removeAll(@NonNull java.lang.Iterable<? extends T> elements)`	Returns a new set with all given elements removed, if present.
`HashSet<T>`	`replace(T currentElement, T newElement)`	Replaces the first occurrence of `currentElement` with `newElement`, if it exists.
`HashSet<T>`	`replaceAll(T currentElement, T newElement)`	Replaces all occurrences of `currentElement` with `newElement`.
`HashSet<T>`	`retainAll(@NonNull java.lang.Iterable<? extends T> elements)`	Retains only the elements from this Traversable that are contained in the given `elements`.
`HashSet<T>`	`scan(T zero, @NonNull java.util.function.BiFunction<? super T,? super T,? extends T> operation)`	Computes a prefix scan of the elements of this Traversable.
`<U> HashSet<U>`	`scanLeft(U zero, @NonNull java.util.function.BiFunction<? super U,? super T,? extends U> operation)`	Produces a collection containing cumulative results of applying the operator from left to right.
`<U> HashSet<U>`	`scanRight(U zero, @NonNull java.util.function.BiFunction<? super T,? super U,? extends U> operation)`	Produces a collection containing cumulative results of applying the operator from right to left.
`Iterator<HashSet<T>>`	`slideBy(@NonNull java.util.function.Function<? super T,?> classifier)`	Partitions this `Traversable` into consecutive non-overlapping windows according to a classification function.
`Iterator<HashSet<T>>`	`sliding(int size)`	Slides a window of a given `size` over this `Traversable` with a step size of 1.
`Iterator<HashSet<T>>`	`sliding(int size, int step)`	Slides a window of a specific `size` with a given `step` over this `Traversable`.
`Tuple2<HashSet<T>,HashSet<T>>`	`span(@NonNull java.util.function.Predicate<? super T> predicate)`	Splits this `Traversable` into a prefix and remainder according to the given `predicate`.
`java.lang.String`	`stringPrefix()`	Returns the name of this Value type, which is used by toString().
`static <T> HashSet<T>`	`tabulate(int n, @NonNull java.util.function.Function<? super java.lang.Integer,? extends T> f)`	Returns an HashSet containing `n` values of a given Function `f` over a range of integer values from 0 to `n - 1`.
`HashSet<T>`	`tail()`	Returns a new `Traversable` without its first element.
`Option<HashSet<T>>`	`tailOption()`	Returns a new `Traversable` without its first element as an `Option`.
`HashSet<T>`	`take(int n)`	Returns the first `n` elements of this `Traversable`, or all elements if `n` exceeds the length.
`HashSet<T>`	`takeRight(int n)`	Returns the last `n` elements of this `Traversable`, or all elements if `n` exceeds the length.
`HashSet<T>`	`takeUntil(@NonNull java.util.function.Predicate<? super T> predicate)`	Takes elements from this `Traversable` until the given predicate holds for an element.
`HashSet<T>`	`takeWhile(@NonNull java.util.function.Predicate<? super T> predicate)`	Takes elements from this `Traversable` while the given predicate holds.
`java.util.HashSet<T>`	`toJavaSet()`	Converts this Vavr set to a `java.util.Set`, preserving insertion or sort order.
`java.lang.String`	`toString()`	Clarifies that values have a proper toString() method implemented.
`<U> U`	`transform(java.util.function.Function<? super HashSet<T>,? extends U> f)`	Transforms this `HashSet`.
`HashSet<T>`	`union(@NonNull Set<? extends T> elements)`	Returns a new set containing all distinct elements from this set and the given set.
`<T1,T2> Tuple2<HashSet<T1>,HashSet<T2>>`	`unzip(@NonNull java.util.function.Function<? super T,Tuple2<? extends T1,? extends T2>> unzipper)`	Unzips the elements of this `Traversable` by mapping each element to a pair and splitting them into two separate `Traversable` collections.
`<T1,T2,T3> Tuple3<HashSet<T1>,HashSet<T2>,HashSet<T3>>`	`unzip3(@NonNull java.util.function.Function<? super T,Tuple3<? extends T1,? extends T2,? extends T3>> unzipper)`	Unzips the elements of this `Traversable` by mapping each element to a triple and splitting them into three separate `Traversable` collections.
`private java.lang.Object`	`writeReplace()`	`writeReplace` method for the serialization proxy pattern.
`<U> HashSet<Tuple2<T,U>>`	`zip(@NonNull java.lang.Iterable<? extends U> that)`	Returns a `Traversable` formed by pairing elements of this `Traversable` with elements of another `Iterable`.
`<U> HashSet<Tuple2<T,U>>`	`zipAll(@NonNull java.lang.Iterable<? extends U> that, T thisElem, U thatElem)`	Returns a `Traversable` formed by pairing elements of this `Traversable` with elements of another `Iterable`, filling in placeholder elements when one collection is shorter than the other.
`<U,R> HashSet<R>`	`zipWith(@NonNull java.lang.Iterable<? extends U> that, java.util.function.BiFunction<? super T,? super U,? extends R> mapper)`	Returns a `Traversable` by combining elements of this `Traversable` with elements of another `Iterable` using a mapping function.
`HashSet<Tuple2<T,java.lang.Integer>>`	`zipWithIndex()`	Zips this `Traversable` with its indices, starting at 0.
`<U> HashSet<U>`	`zipWithIndex(@NonNull java.util.function.BiFunction<? super T,? super java.lang.Integer,? extends U> mapper)`	Zips this `Traversable` with its indices and maps the resulting pairs using the provided mapper.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface io.vavr.collection.Foldable
fold, reduce, reduceOption

Methods inherited from interface io.vavr.Function1
andThen, arity, compose, compose1, curried, isMemoized, memoized, partial, reversed, tupled

Methods inherited from interface io.vavr.collection.Set
apply, isDistinct

Methods inherited from interface io.vavr.collection.Traversable
arrangeBy, average, containsAll, count, existsUnique, find, findLast, foldLeft, forEachWithIndex, get, isOrdered, isSequential, isSingleValued, lastOption, max, maxBy, maxBy, min, minBy, minBy, mkCharSeq, mkCharSeq, mkCharSeq, mkString, mkString, nonEmpty, product, reduceLeft, reduceLeftOption, reduceRight, reduceRightOption, single, singleOption, size, spliterator, sum

Methods inherited from interface io.vavr.Value
collect, collect, corresponds, eq, exists, forAll, forEach, getOrElse, getOrElse, getOrElseThrow, getOrElseTry, getOrNull, out, out, stderr, stdout, toArray, toCharSeq, toCompletableFuture, toEither, toEither, toInvalid, toInvalid, toJavaArray, toJavaArray, toJavaArray, toJavaCollection, toJavaList, toJavaList, toJavaMap, toJavaMap, toJavaMap, toJavaOptional, toJavaParallelStream, toJavaSet, toJavaStream, toLeft, toLeft, toLinkedMap, toLinkedMap, toLinkedSet, toList, toMap, toMap, toOption, toPriorityQueue, toPriorityQueue, toQueue, toRight, toRight, toSet, toSortedMap, toSortedMap, toSortedMap, toSortedMap, toSortedSet, toSortedSet, toStream, toTree, toTree, toTry, toTry, toValid, toValid, toValidation, toValidation, toVector

- Field Detail
 - serialVersionUID
```
private static final long serialVersionUID
```
 See Also:
 
 Constant Field Values
 - EMPTY
```
private static final HashSet<?> EMPTY
```
 - tree
```
private final HashArrayMappedTrie<T,T> tree
```
- Constructor Detail
 - HashSet
```
private HashSet(HashArrayMappedTrie<T,T> tree)
```
- Method Detail
 - empty
```
public static <T> HashSet<T> empty()
```
 Returns the empty HashSet.
 
 Type Parameters:
 
 T - Component type
 
 Returns:
 
 The empty HashSet.
 - collector
```
public static <T> java.util.stream.Collector<T,java.util.ArrayList<T>,HashSet<T>> collector()
```
 Returns a Collector which may be used in conjunction with Stream.collect(java.util.stream.Collector) to obtain a HashSet.
 
 Type Parameters:
 
 T - Component type of the HashSet.
 
 Returns:
 
 A io.vavr.collection.HashSet Collector.
 - narrow
```
public static <T> HashSet<T> narrow(HashSet<? extends T> hashSet)
```
 Narrows a HashSet<? extends T> to HashSet<T> via a type-safe cast. Safe here because the set is immutable and no elements can be added that would violate the type (covariance)
 
 Type Parameters:
 
 T - the target element type
 
 Parameters:
 
 hashSet - the set to narrow
 
 Returns:
 
 the same set viewed as HashSet<T>
 - of
```
public static <T> HashSet<T> of(T element)
```
 Returns a singleton HashSet, i.e. a HashSet of one element.
 
 Type Parameters:
 
 T - The component type
 
 Parameters:
 
 element - An element.
 
 Returns:
 
 A new HashSet instance containing the given element
 - of
```
@SafeVarargs
public static <T> HashSet<T> of(T @NonNull ... elements)
```
 Creates a HashSet of the given elements.
 HashSet.of(1, 2, 3, 4)
 Type Parameters:
 
 T - Component type of the HashSet.
 
 Parameters:
 
 elements - Zero or more elements.
 
 Returns:
 
 A set containing the given elements.
 
 Throws:
 
 java.lang.NullPointerException - if elements is null
 - tabulate
```
public static <T> HashSet<T> tabulate(int n,
 @NonNull java.util.function.Function<? super java.lang.Integer,? extends T> f)
```
 Returns an HashSet containing n values of a given Function f over a range of integer values from 0 to n - 1.
 
 Type Parameters:
 
 T - Component type of the HashSet
 
 Parameters:
 
 n - The number of elements in the HashSet
 
 f - The Function computing element values
 
 Returns:
 
 An HashSet consisting of elements f(0),f(1), ..., f(n - 1)
 
 Throws:
 
 java.lang.NullPointerException - if f is null
 - fill
```
public static <T> HashSet<T> fill(int n,
 @NonNull java.util.function.Supplier<? extends T> s)
```
 Returns a HashSet containing tuples returned by n calls to a given Supplier s.
 
 Type Parameters:
 
 T - Component type of the HashSet
 
 Parameters:
 
 n - The number of elements in the HashSet
 
 s - The Supplier computing element values
 
 Returns:
 
 An HashSet of size n, where each element contains the result supplied by s.
 
 Throws:
 
 java.lang.NullPointerException - if s is null
 - ofAll
```
public static <T> HashSet<T> ofAll(@NonNull java.lang.Iterable<? extends T> elements)
```
 Creates a HashSet of the given elements.
 
 Type Parameters:
 
 T - The value type
 
 Parameters:
 
 elements - Set elements
 
 Returns:
 
 A new HashSet containing the given entries
 - ofAll
```
public static <T> HashSet<T> ofAll(java.util.stream.Stream<? extends T> javaStream)
```
 Creates a HashSet that contains the elements of the given Stream.
 
 Type Parameters:
 
 T - Component type of the Stream.
 
 Parameters:
 
 javaStream - A Stream
 
 Returns:
 
 A HashSet containing the given elements in the same order.
 - ofAll
```
public static HashSet<java.lang.Boolean> ofAll(boolean @NonNull ... elements)
```
 Creates a HashSet from boolean values.
 
 Parameters:
 
 elements - boolean values
 
 Returns:
 
 A new HashSet of Boolean values
 
 Throws:
 
 java.lang.NullPointerException - if elements is null
 - ofAll
```
public static HashSet<java.lang.Byte> ofAll(byte @NonNull ... elements)
```
 Creates a HashSet from byte values.
 
 Parameters:
 
 elements - byte values
 
 Returns:
 
 A new HashSet of Byte values
 
 Throws:
 
 java.lang.NullPointerException - if elements is null
 - ofAll
```
public static HashSet<java.lang.Character> ofAll(char @NonNull ... elements)
```
 Creates a HashSet from char values.
 
 Parameters:
 
 elements - char values
 
 Returns:
 
 A new HashSet of Character values
 
 Throws:
 
 java.lang.NullPointerException - if elements is null
 - ofAll
```
public static HashSet<java.lang.Double> ofAll(double @NonNull ... elements)
```
 Creates a HashSet from double values.
 
 Parameters:
 
 elements - double values
 
 Returns:
 
 A new HashSet of Double values
 
 Throws:
 
 java.lang.NullPointerException - if elements is null
 - ofAll
```
public static HashSet<java.lang.Float> ofAll(float @NonNull ... elements)
```
 Creates a HashSet from float values.
 
 Parameters:
 
 elements - float values
 
 Returns:
 
 A new HashSet of Float values
 
 Throws:
 
 java.lang.NullPointerException - if elements is null
 - ofAll
```
public static HashSet<java.lang.Integer> ofAll(int @NonNull ... elements)
```
 Creates a HashSet from int values.
 
 Parameters:
 
 elements - int values
 
 Returns:
 
 A new HashSet of Integer values
 
 Throws:
 
 java.lang.NullPointerException - if elements is null
 - ofAll
```
public static HashSet<java.lang.Long> ofAll(long @NonNull ... elements)
```
 Creates a HashSet from long values.
 
 Parameters:
 
 elements - long values
 
 Returns:
 
 A new HashSet of Long values
 
 Throws:
 
 java.lang.NullPointerException - if elements is null
 - ofAll
```
public static HashSet<java.lang.Short> ofAll(short @NonNull ... elements)
```
 Creates a HashSet from short values.
 
 Parameters:
 
 elements - short values
 
 Returns:
 
 A new HashSet of Short values
 
 Throws:
 
 java.lang.NullPointerException - if elements is null
 - range
```
public static HashSet<java.lang.Integer> range(int from,
 int toExclusive)
```
 Creates a HashSet of int numbers starting from from, extending to toExclusive - 1.
 Examples:
 HashSet.range(0, 0) // = HashSet() HashSet.range(2, 0) // = HashSet() HashSet.range(-2, 2) // = HashSet(-2, -1, 0, 1)
 Parameters:
 
 from - the first number
 
 toExclusive - the last number + 1
 
 Returns:
 
 a range of int values as specified or the empty range if from >= toExclusive
 - range
```
public static HashSet<java.lang.Character> range(char from,
 char toExclusive)
```
 Creates a HashSet of char numbers starting from from, extending to toExclusive - 1.
 Examples:
 HashSet.range('a', 'a') // = HashSet() HashSet.range('c', 'a') // = HashSet() HashSet.range('a', 'd') // = HashSet('a', 'b', 'c')
 Parameters:
 
 from - the first char
 
 toExclusive - the last char + 1
 
 Returns:
 
 a range of char values as specified or the empty range if from >= toExclusive
 - rangeBy
```
public static HashSet<java.lang.Integer> rangeBy(int from,
 int toExclusive,
 int step)
```
 Creates a HashSet of int numbers starting from from, extending to toExclusive - 1, with step.
 Examples:
 HashSet.rangeBy(1, 3, 1) // = HashSet(1, 2) HashSet.rangeBy(1, 4, 2) // = HashSet(1, 3) HashSet.rangeBy(4, 1, -2) // = HashSet(4, 2) HashSet.rangeBy(4, 1, 2) // = HashSet()
 Parameters:
 
 from - the first number
 
 toExclusive - the last number + 1
 
 step - the step
 
 Returns:
 
 a range of long values as specified or the empty range if
 from >= toInclusive and step > 0 or
 from <= toInclusive and step < 0
 
 Throws:
 
 java.lang.IllegalArgumentException - if step is zero
 - rangeBy
```
public static HashSet<java.lang.Character> rangeBy(char from,
 char toExclusive,
 int step)
```
 Creates a HashSet of char numbers starting from from, extending to toExclusive - 1, with step.
 Examples:
 HashSet.rangeBy('a', 'c', 1) // = HashSet('a', 'b') HashSet.rangeBy('a', 'd', 2) // = HashSet('a', 'c') HashSet.rangeBy('d', 'a', -2) // = HashSet('d', 'b') HashSet.rangeBy('d', 'a', 2) // = HashSet()
 Parameters:
 
 from - the first char
 
 toExclusive - the last char + 1
 
 step - the step
 
 Returns:
 
 a range of char values as specified or the empty range if
 from >= toExclusive and step > 0 or
 from <= toExclusive and step < 0
 
 Throws:
 
 java.lang.IllegalArgumentException - if step is zero
 - rangeBy
```
@GwtIncompatible
public static HashSet<java.lang.Double> rangeBy(double from,
 double toExclusive,
 double step)
```
 Creates a HashSet of double numbers starting from from, extending to toExclusive - 1, with step.
 Examples:
 HashSet.rangeBy(1.0, 3.0, 1.0) // = HashSet(1.0, 2.0) HashSet.rangeBy(1.0, 4.0, 2.0) // = HashSet(1.0, 3.0) HashSet.rangeBy(4.0, 1.0, -2.0) // = HashSet(4.0, 2.0) HashSet.rangeBy(4.0, 1.0, 2.0) // = HashSet()
 Parameters:
 
 from - the first double
 
 toExclusive - the last double + 1
 
 step - the step
 
 Returns:
 
 a range of double values as specified or the empty range if
 from >= toExclusive and step > 0 or
 from <= toExclusive and step < 0
 
 Throws:
 
 java.lang.IllegalArgumentException - if step is zero
 - range
```
public static HashSet<java.lang.Long> range(long from,
 long toExclusive)
```
 Creates a HashSet of long numbers starting from from, extending to toExclusive - 1.
 Examples:
 HashSet.range(0L, 0L) // = HashSet() HashSet.range(2L, 0L) // = HashSet() HashSet.range(-2L, 2L) // = HashSet(-2L, -1L, 0L, 1L)
 Parameters:
 
 from - the first number
 
 toExclusive - the last number + 1
 
 Returns:
 
 a range of long values as specified or the empty range if from >= toExclusive
 - rangeBy
```
public static HashSet<java.lang.Long> rangeBy(long from,
 long toExclusive,
 long step)
```
 Creates a HashSet of long numbers starting from from, extending to toExclusive - 1, with step.
 Examples:
 HashSet.rangeBy(1L, 3L, 1L) // = HashSet(1L, 2L) HashSet.rangeBy(1L, 4L, 2L) // = HashSet(1L, 3L) HashSet.rangeBy(4L, 1L, -2L) // = HashSet(4L, 2L) HashSet.rangeBy(4L, 1L, 2L) // = HashSet()
 Parameters:
 
 from - the first number
 
 toExclusive - the last number + 1
 
 step - the step
 
 Returns:
 
 a range of long values as specified or the empty range if
 from >= toInclusive and step > 0 or
 from <= toInclusive and step < 0
 
 Throws:
 
 java.lang.IllegalArgumentException - if step is zero
 - rangeClosed
```
public static HashSet<java.lang.Integer> rangeClosed(int from,
 int toInclusive)
```
 Creates a HashSet of int numbers starting from from, extending to toInclusive.
 Examples:
 HashSet.rangeClosed(0, 0) // = HashSet(0) HashSet.rangeClosed(2, 0) // = HashSet() HashSet.rangeClosed(-2, 2) // = HashSet(-2, -1, 0, 1, 2)
 Parameters:
 
 from - the first number
 
 toInclusive - the last number
 
 Returns:
 
 a range of int values as specified or the empty range if from > toInclusive
 - rangeClosed
```
public static HashSet<java.lang.Character> rangeClosed(char from,
 char toInclusive)
```
 Creates a HashSet of char numbers starting from from, extending to toInclusive.
 Examples:
 HashSet.rangeClosed('a', 'a') // = HashSet('a') HashSet.rangeClosed('c', 'a') // = HashSet() HashSet.rangeClosed('a', 'c') // = HashSet('a', 'b', 'c')
 Parameters:
 
 from - the first char
 
 toInclusive - the last char
 
 Returns:
 
 a range of char values as specified or the empty range if from > toInclusive
 - rangeClosedBy
```
public static HashSet<java.lang.Integer> rangeClosedBy(int from,
 int toInclusive,
 int step)
```
 Creates a HashSet of int numbers starting from from, extending to toInclusive, with step.
 Examples:
 HashSet.rangeClosedBy(1, 3, 1) // = HashSet(1, 2, 3) HashSet.rangeClosedBy(1, 4, 2) // = HashSet(1, 3) HashSet.rangeClosedBy(4, 1, -2) // = HashSet(4, 2) HashSet.rangeClosedBy(4, 1, 2) // = HashSet()
 Parameters:
 
 from - the first number
 
 toInclusive - the last number
 
 step - the step
 
 Returns:
 
 a range of int values as specified or the empty range if
 from > toInclusive and step > 0 or
 from < toInclusive and step < 0
 
 Throws:
 
 java.lang.IllegalArgumentException - if step is zero
 - rangeClosedBy
```
public static HashSet<java.lang.Character> rangeClosedBy(char from,
 char toInclusive,
 int step)
```
 Creates a HashSet of char numbers starting from from, extending to toInclusive, with step.
 Examples:
 HashSet.rangeClosedBy('a', 'c', 1) // = HashSet('a', 'b', 'c') HashSet.rangeClosedBy('a', 'd', 2) // = HashSet('a', 'c') HashSet.rangeClosedBy('d', 'a', -2) // = HashSet('d', 'b') HashSet.rangeClosedBy('d', 'a', 2) // = HashSet()
 Parameters:
 
 from - the first char
 
 toInclusive - the last char
 
 step - the step
 
 Returns:
 
 a range of char values as specified or the empty range if
 from > toInclusive and step > 0 or
 from < toInclusive and step < 0
 
 Throws:
 
 java.lang.IllegalArgumentException - if step is zero
 - rangeClosedBy
```
@GwtIncompatible
public static HashSet<java.lang.Double> rangeClosedBy(double from,
 double toInclusive,
 double step)
```
 Creates a HashSet of double numbers starting from from, extending to toInclusive, with step.
 Examples:
 HashSet.rangeClosedBy(1.0, 3.0, 1.0) // = HashSet(1.0, 2.0, 3.0) HashSet.rangeClosedBy(1.0, 4.0, 2.0) // = HashSet(1.0, 3.0) HashSet.rangeClosedBy(4.0, 1.0, -2.0) // = HashSet(4.0, 2.0) HashSet.rangeClosedBy(4.0, 1.0, 2.0) // = HashSet()
 Parameters:
 
 from - the first double
 
 toInclusive - the last double
 
 step - the step
 
 Returns:
 
 a range of double values as specified or the empty range if
 from > toInclusive and step > 0 or
 from < toInclusive and step < 0
 
 Throws:
 
 java.lang.IllegalArgumentException - if step is zero
 - rangeClosed
```
public static HashSet<java.lang.Long> rangeClosed(long from,
 long toInclusive)
```
 Creates a HashSet of long numbers starting from from, extending to toInclusive.
 Examples:
 HashSet.rangeClosed(0L, 0L) // = HashSet(0L) HashSet.rangeClosed(2L, 0L) // = HashSet() HashSet.rangeClosed(-2L, 2L) // = HashSet(-2L, -1L, 0L, 1L, 2L)
 Parameters:
 
 from - the first number
 
 toInclusive - the last number
 
 Returns:
 
 a range of long values as specified or the empty range if from > toInclusive
 - rangeClosedBy
```
public static HashSet<java.lang.Long> rangeClosedBy(long from,
 long toInclusive,
 long step)
```
 Creates a HashSet of long numbers starting from from, extending to toInclusive, with step.
 Examples:
 HashSet.rangeClosedBy(1L, 3L, 1L) // = HashSet(1L, 2L, 3L) HashSet.rangeClosedBy(1L, 4L, 2L) // = HashSet(1L, 3L) HashSet.rangeClosedBy(4L, 1L, -2L) // = HashSet(4L, 2L) HashSet.rangeClosedBy(4L, 1L, 2L) // = HashSet()
 Parameters:
 
 from - the first number
 
 toInclusive - the last number
 
 step - the step
 
 Returns:
 
 a range of int values as specified or the empty range if
 from > toInclusive and step > 0 or
 from < toInclusive and step < 0
 
 Throws:
 
 java.lang.IllegalArgumentException - if step is zero
 - add
```
public HashSet<T> add(T element)
```
 Description copied from interface: Set
 
 Returns a new set containing all elements of this set plus the given element, if it was not already present.
 
 Specified by:
 
 add in interface Set<T>
 
 Parameters:
 
 element - the element to add
 
 Returns:
 
 a new set including the element
 - addAll
```
public HashSet<T> addAll(@NonNull java.lang.Iterable<? extends T> elements)
```
 Description copied from interface: Set
 
 Returns a new set containing all elements of this set plus the given elements, excluding duplicates.
 
 Specified by:
 
 addAll in interface Set<T>
 
 Parameters:
 
 elements - the elements to add
 
 Returns:
 
 a new set including the additional elements
 - collect
```
public <R> HashSet<R> collect(@NonNull PartialFunction<? super T,? extends R> partialFunction)
```
 Description copied from interface: Traversable
 Applies a PartialFunction to all elements that are defined for it and collects the results.
 For each element in iteration order, the function is first tested:
 partialFunction.isDefinedAt(element)
 If true, the element is mapped to type R:
 R newElement = partialFunction.apply(element)
 
 Note: If this Traversable is ordered (i.e., extends Ordered), the caller must ensure that the resulting elements are comparable (i.e., implement Comparable).
 Specified by:
 
 collect in interface Set<T>
 
 Specified by:
 
 collect in interface Traversable<T>
 
 Type Parameters:
 
 R - the type of elements in the resulting Traversable
 
 Parameters:
 
 partialFunction - a function that may not be defined for all elements of this traversable
 
 Returns:
 
 a new Traversable containing the results of applying the partial function
 - contains
```
public boolean contains(T element)
```
 Description copied from interface: Value
 
 Shortcut for exists(e -> Objects.equals(e, element)), tests if the given element is contained.
 
 Specified by:
 
 contains in interface Set<T>
 
 Specified by:
 
 contains in interface Value<T>
 
 Parameters:
 
 element - An Object of type A, may be null.
 
 Returns:
 
 true, if element is contained, false otherwise.
 - diff
```
public HashSet<T> diff(@NonNull Set<? extends T> elements)
```
 Description copied from interface: Set
 
 Returns a new set containing all elements of this set except those in the given set.
 
 Specified by:
 
 diff in interface Set<T>
 
 Parameters:
 
 elements - the set of elements to remove
 
 Returns:
 
 a new set without the specified elements
 - distinct
```
public HashSet<T> distinct()
```
 Description copied from interface: Traversable
 
 Returns a new Traversable containing the elements of this instance with all duplicates removed. Element equality is determined using equals.
 
 Specified by:
 
 distinct in interface Set<T>
 
 Specified by:
 
 distinct in interface Traversable<T>
 
 Returns:
 
 a new Traversable without duplicate elements
 - distinctBy
```
public HashSet<T> distinctBy(@NonNull java.util.Comparator<? super T> comparator)
```
 Description copied from interface: Traversable
 
 Returns a new Traversable containing the elements of this instance without duplicates, as determined by the given comparator.
 
 Specified by:
 
 distinctBy in interface Set<T>
 
 Specified by:
 
 distinctBy in interface Traversable<T>
 
 Parameters:
 
 comparator - a comparator used to determine equality of elements
 
 Returns:
 
 a new Traversable with duplicates removed
 - distinctBy
```
public  HashSet<T> distinctBy(@NonNull java.util.function.Function<? super T,? extends U> keyExtractor)
```
 Description copied from interface: Traversable
 
 Returns a new Traversable containing the elements of this instance without duplicates, based on keys extracted from elements using keyExtractor.
 The first occurrence of each key is retained in the resulting sequence.
 
 Specified by:
 
 distinctBy in interface Set<T>
 
 Specified by:
 
 distinctBy in interface Traversable<T>
 
 Type Parameters:
 
 U - the type of key
 
 Parameters:
 
 keyExtractor - a function to extract keys for determining uniqueness
 
 Returns:
 
 a new Traversable with duplicates removed based on keys
 - drop
```
public HashSet<T> drop(int n)
```
 Description copied from interface: Traversable
 
 Returns a new Traversable without the first n elements, or an empty instance if this contains fewer than n elements.
 
 Specified by:
 
 drop in interface Set<T>
 
 Specified by:
 
 drop in interface Traversable<T>
 
 Parameters:
 
 n - the number of elements to drop
 
 Returns:
 
 a new instance excluding the first n elements
 - dropRight
```
public HashSet<T> dropRight(int n)
```
 Description copied from interface: Traversable
 
 Returns a new Traversable without the last n elements, or an empty instance if this contains fewer than n elements.
 
 Specified by:
 
 dropRight in interface Set<T>
 
 Specified by:
 
 dropRight in interface Traversable<T>
 
 Parameters:
 
 n - the number of elements to drop from the end
 
 Returns:
 
 a new instance excluding the last n elements
 - dropUntil
```
public HashSet<T> dropUntil(@NonNull java.util.function.Predicate<? super T> predicate)
```
 Description copied from interface: Traversable
 
 Returns a new Traversable starting from the first element that satisfies the given predicate, dropping all preceding elements.
 
 Specified by:
 
 dropUntil in interface Set<T>
 
 Specified by:
 
 dropUntil in interface Traversable<T>
 
 Parameters:
 
 predicate - a condition tested on each element
 
 Returns:
 
 a new instance starting from the first element matching the predicate
 - dropWhile
```
public HashSet<T> dropWhile(@NonNull java.util.function.Predicate<? super T> predicate)
```
 Description copied from interface: Traversable
 
 Returns a new Traversable starting from the first element that does not satisfy the given predicate, dropping all preceding elements.
 This is equivalent to dropUntil(predicate.negate()), which is useful for method references that cannot be negated directly.
 
 Specified by:
 
 dropWhile in interface Set<T>
 
 Specified by:
 
 dropWhile in interface Traversable<T>
 
 Parameters:
 
 predicate - a condition tested on each element
 
 Returns:
 
 a new instance starting from the first element not matching the predicate
 - filter
```
public HashSet<T> filter(@NonNull java.util.function.Predicate<? super T> predicate)
```
 Description copied from interface: Traversable
 
 Returns a new traversable containing only the elements that satisfy the given predicate.
 
 Specified by:
 
 filter in interface Set<T>
 
 Specified by:
 
 filter in interface Traversable<T>
 
 Parameters:
 
 predicate - the condition to test elements
 
 Returns:
 
 a traversable with elements matching the predicate
 - reject
```
public HashSet<T> reject(@NonNull java.util.function.Predicate<? super T> predicate)
```
 Description copied from interface: Traversable
 
 Returns a new traversable containing only the elements that do not satisfy the given predicate.
 This is equivalent to filter(predicate.negate()).
 
 Specified by:
 
 reject in interface Set<T>
 
 Specified by:
 
 reject in interface Traversable<T>
 
 Parameters:
 
 predicate - the condition to test elements
 
 Returns:
 
 a traversable with elements not matching the predicate
 - flatMap
```
public  HashSet flatMap(@NonNull java.util.function.Function<? super T,? extends java.lang.Iterable<? extends U>> mapper)
```
 Description copied from interface: Traversable
 
 Transforms each element of this Traversable into an Iterable of elements and flattens the resulting iterables into a single Traversable.
 
 Specified by:
 
 flatMap in interface Set<T>
 
 Specified by:
 
 flatMap in interface Traversable<T>
 
 Type Parameters:
 
 U - the type of elements in the resulting Traversable
 
 Parameters:
 
 mapper - a function mapping elements to iterables
 
 Returns:
 
 a new Traversable containing all elements produced by applying mapper and flattening
 - foldRight
```
public  U foldRight(U zero,
 @NonNull java.util.function.BiFunction<? super T,? super U,? extends U> f)
```
 Description copied from interface: Foldable
 Folds the elements of this structure from the right, starting with the given zero value and successively applying the combine function to each element.
 Folding from the right means that elements are combined starting from the last element and associating each step with the accumulated result so far.
 Example:
 // Result: "!cba" List.of("a", "b", "c").foldRight("!", (x, acc) -> acc + x);
 Specified by:
 
 foldRight in interface Foldable<T>
 
 Specified by:
 
 foldRight in interface Traversable<T>
 
 Type Parameters:
 
 U - the type of the accumulated result
 
 Parameters:
 
 zero - the initial value to start folding with
 
 f - a function that combines the next element and the accumulated value
 
 Returns:
 
 the folded result
 - groupBy
```
public <C> Map<C,HashSet<T>> groupBy(@NonNull java.util.function.Function<? super T,? extends C> classifier)
```
 Description copied from interface: Traversable
 
 Groups elements of this Traversable based on a classifier function.
 
 Specified by:
 
 groupBy in interface Set<T>
 
 Specified by:
 
 groupBy in interface Traversable<T>
 
 Type Parameters:
 
 C - The type of the group keys
 
 Parameters:
 
 classifier - A function that assigns each element to a group
 
 Returns:
 
 A map where each key corresponds to a group of elements
 
 See Also:
 
 Traversable.arrangeBy(Function)
 - grouped
```
public Iterator<HashSet<T>> grouped(int size)
```
 Description copied from interface: Traversable
 Splits this Traversable into consecutive blocks of the given size.
 Let length be the number of elements in this Traversable:
 
 If empty, the resulting Iterator is empty.
 
 If size <= length, the resulting Iterator contains length / size blocks of size size and possibly a final smaller block of size length % size.
 
 If size > length, the resulting Iterator contains a single block of size length.
 
 Examples:
 
 [].grouped(1) = [] [].grouped(0) throws [].grouped(-1) throws [1,2,3,4].grouped(2) = [[1,2],[3,4]] [1,2,3,4,5].grouped(2) = [[1,2],[3,4],[5]] [1,2,3,4].grouped(5) = [[1,2,3,4]]
 
 Note: grouped(size) is equivalent to sliding(size, size).
 Specified by:
 
 grouped in interface Set<T>
 
 Specified by:
 
 grouped in interface Traversable<T>
 
 Parameters:
 
 size - the block size; must be positive
 
 Returns:
 
 an Iterator over blocks of elements
 - hasDefiniteSize
```
public boolean hasDefiniteSize()
```
 Description copied from interface: Traversable
 
 Indicates whether this Traversable has a known finite size.
 This should typically be implemented by concrete classes, not interfaces.
 
 Specified by:
 
 hasDefiniteSize in interface Traversable<T>
 
 Returns:
 
 true if the number of elements is finite and known, false otherwise.
 - head
```
public T head()
```
 Description copied from interface: Traversable
 
 Returns the first element of this non-empty Traversable.
 
 Specified by:
 
 head in interface Traversable<T>
 
 Returns:
 
 the first element
 - headOption
```
public Option<T> headOption()
```
 Description copied from interface: Traversable
 
 Returns the first element of this Traversable as an Option.
 
 Specified by:
 
 headOption in interface Traversable<T>
 
 Returns:
 
 Some(element) if non-empty, otherwise None
 - init
```
public HashSet<T> init()
```
 Description copied from interface: Traversable
 
 Returns all elements of this Traversable except the last one.
 This is the dual of Traversable.tail().
 
 Specified by:
 
 init in interface Set<T>
 
 Specified by:
 
 init in interface Traversable<T>
 
 Returns:
 
 a new instance containing all elements except the last
 - initOption
```
public Option<HashSet<T>> initOption()
```
 Description copied from interface: Traversable
 
 Returns all elements of this Traversable except the last one, wrapped in an Option.
 This is the dual of Traversable.tailOption().
 
 Specified by:
 
 initOption in interface Set<T>
 
 Specified by:
 
 initOption in interface Traversable<T>
 
 Returns:
 
 Some(traversable) if non-empty, or None if this Traversable is empty
 - intersect
```
public HashSet<T> intersect(@NonNull Set<? extends T> elements)
```
 Description copied from interface: Set
 
 Returns a new set containing only the elements present in both this set and the given set.
 
 Specified by:
 
 intersect in interface Set<T>
 
 Parameters:
 
 elements - the set to intersect with
 
 Returns:
 
 a new set with elements common to both sets
 - isAsync
```
public boolean isAsync()
```
 A HashSet is computed synchronously.
 
 Specified by:
 
 isAsync in interface Value<T>
 
 Returns:
 
 false
 - isEmpty
```
public boolean isEmpty()
```
 Description copied from interface: Traversable
 
 Checks if this Traversable contains no elements.
 
 Specified by:
 
 isEmpty in interface Traversable<T>
 
 Specified by:
 
 isEmpty in interface Value<T>
 
 Returns:
 
 true if empty, false otherwise
 - isLazy
```
public boolean isLazy()
```
 A HashSet is computed eagerly.
 
 Specified by:
 
 isLazy in interface Value<T>
 
 Returns:
 
 false
 - isTraversableAgain
```
public boolean isTraversableAgain()
```
 Description copied from interface: Traversable
 
 Checks if this Traversable can be traversed multiple times without side effects.
 Implementations should provide the correct behavior; this is not meant for interfaces alone.
 
 Specified by:
 
 isTraversableAgain in interface Traversable<T>
 
 Returns:
 
 true if this Traversable is guaranteed to be repeatably traversable, false otherwise
 - iterator
```
public @NonNull Iterator<T> iterator()
```
 Description copied from interface: Traversable
 
 Returns an iterator over the elements of this Traversable, implemented via Traversable.head() and Traversable.tail(). Subclasses may override for a more efficient implementation.
 
 Specified by:
 
 iterator in interface java.lang.Iterable<T>
 
 Specified by:
 
 iterator in interface Set<T>
 
 Specified by:
 
 iterator in interface Traversable<T>
 
 Specified by:
 
 iterator in interface Value<T>
 
 Returns:
 
 a new Iterator over the elements of this Traversable
 - last
```
public T last()
```
 Description copied from interface: Traversable
 
 Returns the last element of this Traversable.
 
 Specified by:
 
 last in interface Traversable<T>
 
 Returns:
 
 the last element
 - length
```
public int length()
```
 Description copied from interface: Traversable
 
 Returns the number of elements in this Traversable.
 Equivalent to Traversable.size().
 
 Specified by:
 
 length in interface Set<T>
 
 Specified by:
 
 length in interface Traversable<T>
 
 Returns:
 
 the number of elements
 - map
```
public  HashSet map(@NonNull java.util.function.Function<? super T,? extends U> mapper)
```
 Description copied from interface: Traversable
 
 Transforms the elements of this Traversable to a new type, preserving order if defined.
 
 Specified by:
 
 map in interface Set<T>
 
 Specified by:
 
 map in interface Traversable<T>
 
 Specified by:
 
 map in interface Value<T>
 
 Type Parameters:
 
 U - the target element type
 
 Parameters:
 
 mapper - a mapping function
 
 Returns:
 
 a new Traversable containing the mapped elements
 - mapTo
```
public  HashSet mapTo(U value)
```
 Description copied from interface: Value
 
 Maps the underlying value to another fixed value.
 
 Specified by:
 
 mapTo in interface Set<T>
 
 Specified by:
 
 mapTo in interface Traversable<T>
 
 Specified by:
 
 mapTo in interface Value<T>
 
 Type Parameters:
 
 U - The new component type
 
 Parameters:
 
 value - value to replace the contents with
 
 Returns:
 
 A new value
 - mapToVoid
```
public HashSet<java.lang.Void> mapToVoid()
```
 Description copied from interface: Value
 
 Maps the underlying value to Void
 
 Specified by:
 
 mapToVoid in interface Set<T>
 
 Specified by:
 
 mapToVoid in interface Traversable<T>
 
 Specified by:
 
 mapToVoid in interface Value<T>
 
 Returns:
 
 A new value of type Void
 - mkString
```
public java.lang.String mkString(java.lang.CharSequence prefix,
 java.lang.CharSequence delimiter,
 java.lang.CharSequence suffix)
```
 Description copied from interface: Traversable
 
 Concatenates the string representations of all elements in this Traversable with a prefix, delimiter, and suffix.
 Example: List.of("a", "b", "c").mkString("Chars(", ", ", ")") = "Chars(a, b, c)"
 
 Specified by:
 
 mkString in interface Traversable<T>
 
 Parameters:
 
 prefix - a string prepended to the result
 
 delimiter - a string placed between elements
 
 suffix - a string appended to the result
 
 Returns:
 
 a new String containing the formatted concatenation of elements
 - orElse
```
public HashSet<T> orElse(@NonNull java.lang.Iterable<? extends T> other)
```
 Description copied from interface: Traversable
 
 Returns this Traversable if it is non-empty; otherwise, returns the given alternative.
 
 Specified by:
 
 orElse in interface Set<T>
 
 Specified by:
 
 orElse in interface Traversable<T>
 
 Parameters:
 
 other - an alternative Traversable to return if this is empty
 
 Returns:
 
 this Traversable if non-empty, otherwise other
 - orElse
```
public HashSet<T> orElse(@NonNull java.util.function.Supplier<? extends java.lang.Iterable<? extends T>> supplier)
```
 Description copied from interface: Traversable
 
 Returns this Traversable if it is non-empty; otherwise, returns the result of evaluating the given supplier.
 
 Specified by:
 
 orElse in interface Set<T>
 
 Specified by:
 
 orElse in interface Traversable<T>
 
 Parameters:
 
 supplier - a supplier of an alternative Traversable if this is empty
 
 Returns:
 
 this Traversable if non-empty, otherwise the result of supplier.get()
 - partition
```
public Tuple2<HashSet<T>,HashSet<T>> partition(@NonNull java.util.function.Predicate<? super T> predicate)
```
 Description copied from interface: Traversable
 
 Splits this Traversable into two partitions according to a predicate.
 The first partition contains all elements that satisfy the predicate, and the second contains all elements that do not. The original iteration order is preserved.
 
 Specified by:
 
 partition in interface Set<T>
 
 Specified by:
 
 partition in interface Traversable<T>
 
 Parameters:
 
 predicate - a predicate used to classify elements
 
 Returns:
 
 a Tuple2 containing the two resulting Traversable instances
 - peek
```
public HashSet<T> peek(@NonNull java.util.function.Consumer<? super T> action)
```
 Description copied from interface: Value
 
 Performs the given action on the first element if this is an eager implementation. Performs the given action on all elements (the first immediately, successive deferred), if this is a lazy implementation.
 
 Specified by:
 
 peek in interface Set<T>
 
 Specified by:
 
 peek in interface Traversable<T>
 
 Specified by:
 
 peek in interface Value<T>
 
 Parameters:
 
 action - The action that will be performed on the element(s).
 
 Returns:
 
 this instance
 - remove
```
public HashSet<T> remove(T element)
```
 Description copied from interface: Set
 
 Returns a new set with the given element removed, if it was present.
 
 Specified by:
 
 remove in interface Set<T>
 
 Parameters:
 
 element - the element to remove
 
 Returns:
 
 a new set without the specified element
 - removeAll
```
public HashSet<T> removeAll(@NonNull java.lang.Iterable<? extends T> elements)
```
 Description copied from interface: Set
 
 Returns a new set with all given elements removed, if present.
 
 Specified by:
 
 removeAll in interface Set<T>
 
 Parameters:
 
 elements - the elements to remove
 
 Returns:
 
 a new set without the specified elements
 - replace
```
public HashSet<T> replace(T currentElement,
 T newElement)
```
 Description copied from interface: Traversable
 
 Replaces the first occurrence of currentElement with newElement, if it exists.
 
 Specified by:
 
 replace in interface Set<T>
 
 Specified by:
 
 replace in interface Traversable<T>
 
 Parameters:
 
 currentElement - the element to be replaced
 
 newElement - the replacement element
 
 Returns:
 
 a new Traversable with the first occurrence of currentElement replaced by newElement
 - replaceAll
```
public HashSet<T> replaceAll(T currentElement,
 T newElement)
```
 Description copied from interface: Traversable
 
 Replaces all occurrences of currentElement with newElement.
 
 Specified by:
 
 replaceAll in interface Set<T>
 
 Specified by:
 
 replaceAll in interface Traversable<T>
 
 Parameters:
 
 currentElement - the element to be replaced
 
 newElement - the replacement element
 
 Returns:
 
 a new Traversable with all occurrences of currentElement replaced by newElement
 - retainAll
```
public HashSet<T> retainAll(@NonNull java.lang.Iterable<? extends T> elements)
```
 Description copied from interface: Traversable
 
 Retains only the elements from this Traversable that are contained in the given elements.
 
 Specified by:
 
 retainAll in interface Set<T>
 
 Specified by:
 
 retainAll in interface Traversable<T>
 
 Parameters:
 
 elements - the elements to keep
 
 Returns:
 
 a new Traversable containing only the elements present in elements, in their original order
 - scan
```
public HashSet<T> scan(T zero,
 @NonNull java.util.function.BiFunction<? super T,? super T,? extends T> operation)
```
 Description copied from interface: Traversable
 
 Computes a prefix scan of the elements of this Traversable.
 The neutral element zero may be applied more than once.
 
 Specified by:
 
 scan in interface Set<T>
 
 Specified by:
 
 scan in interface Traversable<T>
 
 Parameters:
 
 zero - the neutral element for the operator
 
 operation - an associative binary operator
 
 Returns:
 
 a new Traversable containing the prefix scan of the elements
 - scanLeft
```
public  HashSet scanLeft(U zero,
 @NonNull java.util.function.BiFunction<? super U,? super T,? extends U> operation)
```
 Description copied from interface: Traversable
 
 Produces a collection containing cumulative results of applying the operator from left to right.
 Will not terminate for infinite collections. The results may vary across runs unless the collection is ordered.
 
 Specified by:
 
 scanLeft in interface Set<T>
 
 Specified by:
 
 scanLeft in interface Traversable<T>
 
 Type Parameters:
 
 U - the type of the resulting elements
 
 Parameters:
 
 zero - the initial value
 
 operation - a binary operator applied to the intermediate result and each element
 
 Returns:
 
 a new Traversable containing the cumulative results
 - scanRight
```
public  HashSet scanRight(U zero,
 @NonNull java.util.function.BiFunction<? super T,? super U,? extends U> operation)
```
 Description copied from interface: Traversable
 
 Produces a collection containing cumulative results of applying the operator from right to left.
 The head of the resulting collection is the last cumulative result. Will not terminate for infinite collections. Results may vary across runs unless the collection is ordered.
 
 Specified by:
 
 scanRight in interface Set<T>
 
 Specified by:
 
 scanRight in interface Traversable<T>
 
 Type Parameters:
 
 U - the type of the resulting elements
 
 Parameters:
 
 zero - the initial value
 
 operation - a binary operator applied to each element and the intermediate result
 
 Returns:
 
 a new Traversable containing the cumulative results
 - slideBy
```
public Iterator<HashSet<T>> slideBy(@NonNull java.util.function.Function<? super T,?> classifier)
```
 Description copied from interface: Traversable
 Partitions this Traversable into consecutive non-overlapping windows according to a classification function.
 Each window contains elements with the same class, as determined by classifier. Two consecutive elements belong to the same window only if classifier returns equal values for both. Otherwise, the current window ends and a new window begins with the next element.
 Examples:
 [].slideBy(Function.identity()) = [] [1,2,3,4,4,5].slideBy(Function.identity()) = [[1],[2],[3],[4,4],[5]] [1,2,3,10,12,5,7,20,29].slideBy(x -> x / 10) = [[1,2,3],[10,12],[5,7],[20,29]]
 Specified by:
 
 slideBy in interface Set<T>
 
 Specified by:
 
 slideBy in interface Traversable<T>
 
 Parameters:
 
 classifier - A function classifying elements into groups
 
 Returns:
 
 An Iterator of windows (grouped elements)
 - sliding
```
public Iterator<HashSet<T>> sliding(int size)
```
 Description copied from interface: Traversable
 
 Slides a window of a given size over this Traversable with a step size of 1.
 This is equivalent to calling Traversable.sliding(int, int) with a step size of 1.
 
 Specified by:
 
 sliding in interface Set<T>
 
 Specified by:
 
 sliding in interface Traversable<T>
 
 Parameters:
 
 size - a positive window size
 
 Returns:
 
 An Iterator of windows, each containing up to size elements
 - sliding
```
public Iterator<HashSet<T>> sliding(int size,
 int step)
```
 Description copied from interface: Traversable
 Slides a window of a specific size with a given step over this Traversable.
 Examples:
 [].sliding(1, 1) = [] [1,2,3,4,5].sliding(2, 3) = [[1,2],[4,5]] [1,2,3,4,5].sliding(2, 4) = [[1,2],[5]] [1,2,3,4,5].sliding(2, 5) = [[1,2]] [1,2,3,4].sliding(5, 3) = [[1,2,3,4],[4]]
 Specified by:
 
 sliding in interface Set<T>
 
 Specified by:
 
 sliding in interface Traversable<T>
 
 Parameters:
 
 size - a positive window size
 
 step - a positive step size
 
 Returns:
 
 an Iterator of windows with the given size and step
 - span
```
public Tuple2<HashSet<T>,HashSet<T>> span(@NonNull java.util.function.Predicate<? super T> predicate)
```
 Description copied from interface: Traversable
 
 Splits this Traversable into a prefix and remainder according to the given predicate.
 The first element of the returned Tuple is the longest prefix of elements satisfying predicate, and the second element is the remaining elements.
 
 Specified by:
 
 span in interface Set<T>
 
 Specified by:
 
 span in interface Traversable<T>
 
 Parameters:
 
 predicate - a predicate used to determine the prefix
 
 Returns:
 
 a Tuple containing the prefix and remainder
 - tail
```
public HashSet<T> tail()
```
 Description copied from interface: Traversable
 
 Returns a new Traversable without its first element.
 
 Specified by:
 
 tail in interface Set<T>
 
 Specified by:
 
 tail in interface Traversable<T>
 
 Returns:
 
 a new Traversable containing all elements except the first
 - tailOption
```
public Option<HashSet<T>> tailOption()
```
 Description copied from interface: Traversable
 
 Returns a new Traversable without its first element as an Option.
 
 Specified by:
 
 tailOption in interface Set<T>
 
 Specified by:
 
 tailOption in interface Traversable<T>
 
 Returns:
 
 Some(traversable) if non-empty, otherwise None
 - take
```
public HashSet<T> take(int n)
```
 Description copied from interface: Traversable
 
 Returns the first n elements of this Traversable, or all elements if n exceeds the length.
 Equivalent to sublist(0, max(0, min(length(), n))), but safe for n < 0 or n > length().
 If n < 0, an empty instance is returned. If n > length(), the full instance is returned.
 
 Specified by:
 
 take in interface Set<T>
 
 Specified by:
 
 take in interface Traversable<T>
 
 Parameters:
 
 n - the number of elements to take
 
 Returns:
 
 a new Traversable containing the first n elements
 - takeRight
```
public HashSet<T> takeRight(int n)
```
 Description copied from interface: Traversable
 
 Returns the last n elements of this Traversable, or all elements if n exceeds the length.
 Equivalent to sublist(max(0, length() - n), length()), but safe for n < 0 or n > length().
 If n < 0, an empty instance is returned. If n > length(), the full instance is returned.
 
 Specified by:
 
 takeRight in interface Set<T>
 
 Specified by:
 
 takeRight in interface Traversable<T>
 
 Parameters:
 
 n - the number of elements to take from the end
 
 Returns:
 
 a new Traversable containing the last n elements
 - takeUntil
```
public HashSet<T> takeUntil(@NonNull java.util.function.Predicate<? super T> predicate)
```
 Description copied from interface: Traversable
 
 Takes elements from this Traversable until the given predicate holds for an element.
 Equivalent to takeWhile(predicate.negate()), but useful when using method references that cannot be negated directly.
 
 Specified by:
 
 takeUntil in interface Set<T>
 
 Specified by:
 
 takeUntil in interface Traversable<T>
 
 Parameters:
 
 predicate - a condition tested sequentially on the elements
 
 Returns:
 
 a new Traversable containing all elements before the first one that satisfies the predicate
 - takeWhile
```
public HashSet<T> takeWhile(@NonNull java.util.function.Predicate<? super T> predicate)
```
 Description copied from interface: Traversable
 
 Takes elements from this Traversable while the given predicate holds.
 
 Specified by:
 
 takeWhile in interface Set<T>
 
 Specified by:
 
 takeWhile in interface Traversable<T>
 
 Parameters:
 
 predicate - a condition tested sequentially on the elements
 
 Returns:
 
 a new Traversable containing all elements up to (but not including) the first one that does not satisfy the predicate
 - transform
```
public  U transform(java.util.function.Function<? super HashSet<T>,? extends U> f)
```
 Transforms this HashSet.
 
 Type Parameters:
 
 U - Type of transformation result
 
 Parameters:
 
 f - A transformation
 
 Returns:
 
 An instance of type U
 
 Throws:
 
 java.lang.NullPointerException - if f is null
 - toJavaSet
```
public java.util.HashSet<T> toJavaSet()
```
 Description copied from interface: Set
 
 Converts this Vavr set to a java.util.Set, preserving insertion or sort order.
 
 Specified by:
 
 toJavaSet in interface Set<T>
 
 Specified by:
 
 toJavaSet in interface Value<T>
 
 Returns:
 
 a new java.util.Set instance
 - union
```
public HashSet<T> union(@NonNull Set<? extends T> elements)
```
 Description copied from interface: Set
 
 Returns a new set containing all distinct elements from this set and the given set.
 
 Specified by:
 
 union in interface Set<T>
 
 Parameters:
 
 elements - the set to union with
 
 Returns:
 
 a new set with all elements from both sets
 - unzip
```
public <T1,T2> Tuple2<HashSet<T1>,HashSet<T2>> unzip(@NonNull java.util.function.Function<? super T,Tuple2<? extends T1,? extends T2>> unzipper)
```
 Description copied from interface: Traversable
 
 Unzips the elements of this Traversable by mapping each element to a pair and splitting them into two separate Traversable collections.
 
 Specified by:
 
 unzip in interface Set<T>
 
 Specified by:
 
 unzip in interface Traversable<T>
 
 Type Parameters:
 
 T1 - type of the first element in the resulting pairs
 
 T2 - type of the second element in the resulting pairs
 
 Parameters:
 
 unzipper - a function that maps elements of this Traversable to pairs
 
 Returns:
 
 a Tuple2 containing two Traversable collections with the split elements
 - unzip3
```
public <T1,T2,T3> Tuple3<HashSet<T1>,HashSet<T2>,HashSet<T3>> unzip3(@NonNull java.util.function.Function<? super T,Tuple3<? extends T1,? extends T2,? extends T3>> unzipper)
```
 Description copied from interface: Traversable
 
 Unzips the elements of this Traversable by mapping each element to a triple and splitting them into three separate Traversable collections.
 
 Specified by:
 
 unzip3 in interface Set<T>
 
 Specified by:
 
 unzip3 in interface Traversable<T>
 
 Type Parameters:
 
 T1 - type of the first element in the resulting triples
 
 T2 - type of the second element in the resulting triples
 
 T3 - type of the third element in the resulting triples
 
 Parameters:
 
 unzipper - a function that maps elements of this Traversable to triples
 
 Returns:
 
 a Tuple3 containing three Traversable collections with the split elements
 - zip
```
public  HashSet<Tuple2<T,U>> zip(@NonNull java.lang.Iterable<? extends U> that)
```
 Description copied from interface: Traversable
 
 Returns a Traversable formed by pairing elements of this Traversable with elements of another Iterable. Pairing stops when either collection runs out of elements; any remaining elements in the longer collection are ignored.
 The length of the resulting Traversable is the minimum of the lengths of this Traversable and that.
 
 Specified by:
 
 zip in interface Set<T>
 
 Specified by:
 
 zip in interface Traversable<T>
 
 Type Parameters:
 
 U - the type of elements in the second half of each pair
 
 Parameters:
 
 that - an Iterable providing the second element of each pair
 
 Returns:
 
 a new Traversable containing pairs of corresponding elements
 - zipWith
```
public <U,R> HashSet<R> zipWith(@NonNull java.lang.Iterable<? extends U> that,
 java.util.function.BiFunction<? super T,? super U,? extends R> mapper)
```
 Description copied from interface: Traversable
 
 Returns a Traversable by combining elements of this Traversable with elements of another Iterable using a mapping function. Pairing stops when either collection runs out of elements.
 The length of the resulting Traversable is the minimum of the lengths of this Traversable and that.
 
 Specified by:
 
 zipWith in interface Set<T>
 
 Specified by:
 
 zipWith in interface Traversable<T>
 
 Type Parameters:
 
 U - the type of elements in the second parameter of the mapper
 
 R - the type of elements in the resulting Traversable
 
 Parameters:
 
 that - an Iterable providing the second parameter of the mapper
 
 mapper - a function that combines elements from this and that into a new element
 
 Returns:
 
 a new Traversable containing mapped elements
 - zipAll
```
public  HashSet<Tuple2<T,U>> zipAll(@NonNull java.lang.Iterable<? extends U> that,
 T thisElem,
 U thatElem)
```
 Description copied from interface: Traversable
 
 Returns a Traversable formed by pairing elements of this Traversable with elements of another Iterable, filling in placeholder elements when one collection is shorter than the other.
 The length of the resulting Traversable is the maximum of the lengths of this Traversable and that.
 If this Traversable is shorter than that, thisElem is used as a filler. Conversely, if that is shorter, thatElem is used.
 
 Specified by:
 
 zipAll in interface Set<T>
 
 Specified by:
 
 zipAll in interface Traversable<T>
 
 Type Parameters:
 
 U - the type of elements in the second half of each pair
 
 Parameters:
 
 that - an Iterable providing the second element of each pair
 
 thisElem - the element used to fill missing values if this Traversable is shorter than that
 
 thatElem - the element used to fill missing values if that is shorter than this Traversable
 
 Returns:
 
 a new Traversable containing pairs of elements, including fillers as needed
 - zipWithIndex
```
public HashSet<Tuple2<T,java.lang.Integer>> zipWithIndex()
```
 Description copied from interface: Traversable
 
 Zips this Traversable with its indices, starting at 0.
 
 Specified by:
 
 zipWithIndex in interface Set<T>
 
 Specified by:
 
 zipWithIndex in interface Traversable<T>
 
 Returns:
 
 a new Traversable containing each element paired with its index
 - zipWithIndex
```
public  HashSet zipWithIndex(@NonNull java.util.function.BiFunction<? super T,? super java.lang.Integer,? extends U> mapper)
```
 Description copied from interface: Traversable
 
 Zips this Traversable with its indices and maps the resulting pairs using the provided mapper.
 
 Specified by:
 
 zipWithIndex in interface Set<T>
 
 Specified by:
 
 zipWithIndex in interface Traversable<T>
 
 Type Parameters:
 
 U - the type of elements in the resulting Traversable
 
 Parameters:
 
 mapper - a function mapping an element and its index to a new element
 
 Returns:
 
 a new Traversable containing the mapped elements
 - equals
```
public boolean equals(java.lang.Object o)
```
 Description copied from interface: Traversable
 Determines whether this collection is equal to the given object.
 In Vavr, there are four basic collection types:
 
 Seq – sequential elements
 
 Set – distinct elements
 
 Map – key-value pairs
 
 Multimap – keys mapped to multiple values
 
 Two collections are considered equal if and only if:
 
 They are of the same collection type (Seq, Set, Map, Multimap)
 
 They contain the same elements
 
 For Seq, the element order is the same
 
 For Map and Multimap, two entries (key1, value1) and (key2, value2) are equal if both their keys and values are equal.
 Additional notes:
 
 No collection equals null (e.g., Queue(1) != null)
 
 Null elements are allowed and treated as expected (e.g., List(null, 1) == Stream(null, 1), HashMap((null,1)) == LinkedHashMap((null,1)))
 
 Element order matters only for Seq
 
 Other collection classes are equal if their types and elements (in iteration order) are equal
 
 Iterators are compared by reference only
 Specified by:
 
 equals in interface Traversable<T>
 
 Specified by:
 
 equals in interface Value<T>
 
 Overrides:
 
 equals in class java.lang.Object
 
 Parameters:
 
 o - the object to compare with, may be null
 
 Returns:
 
 true if the collections are equal according to the rules above, false otherwise
 - hashCode
```
public int hashCode()
```
 Description copied from interface: Traversable
 Returns the hash code of this collection.
 Vavr distinguishes between collections with predictable iteration order (like Seq) and collections with arbitrary iteration order (like Set, Map, and Multimap). In all cases, the hash of an empty collection is defined as 1.
 
 For collections with predictable iteration order, the hash is computed as:
 
 int hash = 1; for (T t : this) { hash = hash * 31 + Objects.hashCode(t); }
 
 For collections with arbitrary iteration order, the hash is computed to be independent of element order:
 
 int hash = 1; for (T t : this) { hash += Objects.hashCode(t); }
 
 Note that these algorithms may change in future Vavr versions. Hash codes are generally not cached, unlike size/length, because caching would increase memory usage due to persistent tree-based structures. Computing the hash code is linear in time, O(n). For frequently re-used collections (e.g., as HashMap keys), caching can be done externally using a wrapper, for example:
 
 {@code public final class Hashed { private final K key; private final Lazy hashCode; public Hashed(K key) { this.key = key; this.hashCode = Lazy.of(() -> Objects.hashCode(key)); } public K key() { return key; }
 Specified by:
 
 hashCode in interface Traversable<T>
 
 Specified by:
 
 hashCode in interface Value<T>
 
 Overrides:
 
 hashCode in class java.lang.Object
 
 Returns:
 
 the hash code of this collection
 - stringPrefix
```
public java.lang.String stringPrefix()
```
 Description copied from interface: Value
 
 Returns the name of this Value type, which is used by toString().
 
 Specified by:
 
 stringPrefix in interface Value<T>
 
 Returns:
 
 This type name.
 - toString
```
public java.lang.String toString()
```
 Description copied from interface: Value
 
 Clarifies that values have a proper toString() method implemented.
 See Object.toString().
 
 Specified by:
 
 toString in interface Value<T>
 
 Overrides:
 
 toString in class java.lang.Object
 
 Returns:
 
 A String representation of this object
 - addAll
```
private static <T> HashArrayMappedTrie<T,T> addAll(HashArrayMappedTrie<T,T> initial,
 java.lang.Iterable<? extends T> additional)
```
 - writeReplace
```
@GwtIncompatible("The Java serialization protocol is explicitly not supported")
private java.lang.Object writeReplace()
```
 writeReplace method for the serialization proxy pattern.
 The presence of this method causes the serialization system to emit a SerializationProxy instance instead of an instance of the enclosing class.
 
 Returns:
 
 A SerializationProxy for this enclosing class.
 - readObject
```
@GwtIncompatible("The Java serialization protocol is explicitly not supported")
private void readObject(java.io.ObjectInputStream stream)
 throws java.io.InvalidObjectException
```
 readObject method for the serialization proxy pattern.
 Guarantees that the serialization system will never generate a serialized instance of the enclosing class.
 
 Parameters:
 
 stream - An object serialization stream.
 
 Throws:
 
 java.io.InvalidObjectException - This method will throw with the message "Proxy required".

Modifier and Type	Field	Description
`private static HashSet<?>`	`EMPTY`
`private static long`	`serialVersionUID`
`private HashArrayMappedTrie<T,T>`	`tree`

Class HashSet<T>

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface io.vavr.collection.Foldable

Methods inherited from interface io.vavr.Function1

Methods inherited from interface io.vavr.collection.Set

Methods inherited from interface io.vavr.collection.Traversable

Methods inherited from interface io.vavr.Value

Field Detail

serialVersionUID

EMPTY

tree

Constructor Detail

HashSet

Method Detail

empty

collector

narrow

of

of

tabulate

fill

ofAll

ofAll

ofAll

ofAll

ofAll

ofAll

ofAll

ofAll

ofAll

ofAll

range

range

rangeBy

rangeBy

rangeBy

range

rangeBy

rangeClosed

rangeClosed

rangeClosedBy

rangeClosedBy

rangeClosedBy

rangeClosed

rangeClosedBy

add

addAll

collect

contains

diff

distinct

distinctBy

distinctBy

drop

dropRight

dropUntil

dropWhile

filter

reject

flatMap

foldRight

groupBy

grouped

hasDefiniteSize

head

headOption

init

initOption

intersect

isAsync

isEmpty

isLazy

isTraversableAgain

iterator

last

length