Package it.unimi.dsi.fastutil.longs

Class LongCollections.EmptyCollection

java.lang.Object

java.util.AbstractCollection<Long>

it.unimi.dsi.fastutil.longs.AbstractLongCollection

it.unimi.dsi.fastutil.longs.LongCollections.EmptyCollection

All Implemented Interfaces:

LongCollection, LongIterable, Iterable<Long>, Collection<Long>

Direct Known Subclasses:

LongBigLists.EmptyBigList, LongLists.EmptyList, LongSets.EmptySet

Enclosing class:

LongCollections

public abstract static class LongCollections.EmptyCollection
extends AbstractLongCollection

An immutable class representing an empty type-specific collection.

This class may be useful to implement your own in case you subclass a type-specific collection.

Method Summary

Modifier and Type	Method	Description
boolean	addAll(LongCollection c)	Adds all elements of the given type-specific collection to this collection.
boolean	addAll(Collection<? extends Long> c)
void	clear()
boolean	contains(long k)	Returns true if this collection contains the specified element.
boolean	containsAll(LongCollection c)	Checks whether this collection contains all elements from the given type-specific collection.
boolean	containsAll(Collection<?> c)
boolean	equals(Object o)
void	forEach(Consumer<? super Long> action)	Deprecated.
void	forEach(LongConsumer action)	Performs the given action for each element of this type-specific Iterable until all elements have been processed or the action throws an exception.
int	hashCode()
LongBidirectionalIterator	iterator()	Returns a type-specific iterator on the elements of this collection.
boolean	removeAll(LongCollection c)	Remove from this collection all elements in the given type-specific collection.
boolean	removeAll(Collection<?> c)
boolean	removeIf(LongPredicate filter)	Remove from this collection all elements which satisfy the given predicate.
boolean	removeIf(Predicate<? super Long> filter)	Deprecated.
boolean	retainAll(LongCollection c)	Retains in this collection only elements from the given type-specific collection.
boolean	retainAll(Collection<?> c)
int	size()
LongSpliterator	spliterator()	Returns a type-specific spliterator on the elements of this collection.
Object[]	toArray()
<T> T[]	toArray(T[] array)
long[]	toLongArray()	Returns a primitive type array containing the items of this collection.
long[]	toLongArray(long[] a)	Deprecated.

Methods inherited from class it.unimi.dsi.fastutil.longs.AbstractLongCollection

add, add, contains, forEach, rem, remove, removeIf, toArray, toString

Methods inherited from class java.util.AbstractCollection

isEmpty

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

isEmpty, toArray

Methods inherited from interface it.unimi.dsi.fastutil.longs.LongCollection

longIterator, longParallelStream, longSpliterator, longStream, parallelStream, stream

Method Details

contains

public boolean contains(long k)

Description copied from class: AbstractLongCollection

Returns true if this collection contains the specified element.

Specified by:

contains in interface LongCollection

Overrides:

contains in class AbstractLongCollection

See Also:

• Collection.contains(Object)

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection<Long>

Overrides:

toArray in class AbstractCollection<Long>

toArray

public <T> T[] toArray(T[] array)

Specified by:

toArray in interface Collection<Long>

Overrides:

toArray in class AbstractCollection<Long>

iterator

public LongBidirectionalIterator iterator()

Description copied from interface: LongCollection

Returns a type-specific iterator on the elements of this collection.

Specified by:

iterator in interface Collection<Long>

Specified by:

iterator in interface Iterable<Long>

Specified by:

iterator in interface LongCollection

Specified by:

iterator in interface LongIterable

Specified by:

iterator in class AbstractLongCollection

Returns:

a type-specific iterator on the elements of this collection.

See Also:

• Iterable.iterator()

spliterator

public LongSpliterator spliterator()

Description copied from interface: LongCollection

Returns a type-specific spliterator on the elements of this collection.

See Collection.spliterator() for more documentation on the requirements of the returned spliterator.

Returns:

a type-specific spliterator on the elements of this collection.

size

public int size()

Specified by:

size in interface Collection<Long>

Specified by:

size in class AbstractCollection<Long>

clear

public void clear()

Specified by:

clear in interface Collection<Long>

Overrides:

clear in class AbstractCollection<Long>

hashCode

public int hashCode()

Specified by:

hashCode in interface Collection<Long>

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Specified by:

equals in interface Collection<Long>

Overrides:

equals in class Object

forEach

@Deprecated
public void forEach(Consumer<? super Long> action)

Deprecated.

Description copied from interface: LongIterable

containsAll

public boolean containsAll(Collection<?> c)

Description copied from class: AbstractLongCollection

Specified by:

containsAll in interface Collection<Long>

Overrides:

containsAll in class AbstractLongCollection

addAll

public boolean addAll(Collection<? extends Long> c)

Description copied from class: AbstractLongCollection

Specified by:

addAll in interface Collection<Long>

Overrides:

addAll in class AbstractLongCollection

removeAll

public boolean removeAll(Collection<?> c)

Description copied from class: AbstractLongCollection

Specified by:

removeAll in interface Collection<Long>

Overrides:

removeAll in class AbstractLongCollection

retainAll

public boolean retainAll(Collection<?> c)

Description copied from class: AbstractLongCollection

Specified by:

retainAll in interface Collection<Long>

Overrides:

retainAll in class AbstractLongCollection

removeIf

@Deprecated
public boolean removeIf(Predicate<? super Long> filter)

Deprecated.

Description copied from interface: LongCollection

toLongArray

public long[] toLongArray()

Description copied from interface: LongCollection

Returns a primitive type array containing the items of this collection.

Specified by:

toLongArray in interface LongCollection

Overrides:

toLongArray in class AbstractLongCollection

Returns:

a primitive type array containing the items of this collection.

See Also:

• Collection.toArray()

toLongArray

@Deprecated
public long[] toLongArray(long[] a)

Deprecated.

Description copied from class: AbstractLongCollection

Returns a primitive type array containing the items of this collection.

Note that, contrarily to Collection.toArray(Object[]), this methods just writes all elements of this collection: no special value will be added after the last one.

Specified by:

toLongArray in interface LongCollection

Overrides:

toLongArray in class AbstractLongCollection

Parameters:

a - if this array is big enough, it will be used to store this collection.

Returns:

a primitive type array containing the items of this collection.

See Also:

• Collection.toArray(Object[])

forEach

public void forEach(LongConsumer action)

Description copied from interface: LongIterable

Performs the given action for each element of this type-specific Iterable until all elements have been processed or the action throws an exception.

Parameters:

action - the action to be performed for each element.

See Also:

• Iterable.forEach(java.util.function.Consumer)

containsAll

public boolean containsAll(LongCollection c)

Description copied from interface: LongCollection

Checks whether this collection contains all elements from the given type-specific collection.

Specified by:

containsAll in interface LongCollection

Overrides:

containsAll in class AbstractLongCollection

Parameters:

c - a type-specific collection.

Returns:

true if this collection contains all elements of the argument.

See Also:

• Collection.containsAll(Collection)

addAll

public boolean addAll(LongCollection c)

Description copied from interface: LongCollection

Adds all elements of the given type-specific collection to this collection.

Specified by:

addAll in interface LongCollection

Overrides:

addAll in class AbstractLongCollection

Parameters:

c - a type-specific collection.

Returns:

true if this collection changed as a result of the call.

See Also:

• Collection.addAll(Collection)

removeAll

public boolean removeAll(LongCollection c)

Description copied from interface: LongCollection

Remove from this collection all elements in the given type-specific collection.

Specified by:

removeAll in interface LongCollection

Overrides:

removeAll in class AbstractLongCollection

Parameters:

c - a type-specific collection.

Returns:

true if this collection changed as a result of the call.

See Also:

• Collection.removeAll(Collection)

retainAll

public boolean retainAll(LongCollection c)

Description copied from interface: LongCollection

Retains in this collection only elements from the given type-specific collection.

Specified by:

retainAll in interface LongCollection

Overrides:

retainAll in class AbstractLongCollection

Parameters:

c - a type-specific collection.

Returns:

true if this collection changed as a result of the call.

See Also:

• Collection.retainAll(Collection)

removeIf

public boolean removeIf(LongPredicate filter)

Description copied from interface: LongCollection

Remove from this collection all elements which satisfy the given predicate.

Parameters:

filter - a predicate which returns true for elements to be removed.

Returns:

true if any elements were removed.

See Also:

• Collection.removeIf(java.util.function.Predicate)