Package it.unimi.dsi.fastutil.ints

Class IntCollections.EmptyCollection

java.lang.Object

java.util.AbstractCollection<Integer>

it.unimi.dsi.fastutil.ints.AbstractIntCollection

it.unimi.dsi.fastutil.ints.IntCollections.EmptyCollection

All Implemented Interfaces:

IntCollection, IntIterable, Iterable<Integer>, Collection<Integer>

Direct Known Subclasses:

IntBigLists.EmptyBigList, IntLists.EmptyList, IntSets.EmptySet

Enclosing class:

IntCollections

public abstract static class IntCollections.EmptyCollection
extends AbstractIntCollection

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(IntCollection c)	Adds all elements of the given type-specific collection to this collection.
boolean	addAll(Collection<? extends Integer> c)
void	clear()
boolean	contains(int k)	Returns true if this collection contains the specified element.
boolean	containsAll(IntCollection 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 Integer> action)	Deprecated.
void	forEach(IntConsumer 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()
IntBidirectionalIterator	iterator()	Returns a type-specific iterator on the elements of this collection.
boolean	removeAll(IntCollection c)	Remove from this collection all elements in the given type-specific collection.
boolean	removeAll(Collection<?> c)
boolean	removeIf(IntPredicate filter)	Remove from this collection all elements which satisfy the given predicate.
boolean	removeIf(Predicate<? super Integer> filter)	Deprecated.
boolean	retainAll(IntCollection c)	Retains in this collection only elements from the given type-specific collection.
boolean	retainAll(Collection<?> c)
int	size()
IntSpliterator	spliterator()	Returns a type-specific spliterator on the elements of this collection.
Object[]	toArray()
<T> T[]	toArray(T[] array)
int[]	toIntArray()	Returns a primitive type array containing the items of this collection.
int[]	toIntArray(int[] a)	Deprecated.

Methods inherited from class it.unimi.dsi.fastutil.ints.AbstractIntCollection

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.ints.IntCollection

intIterator, intParallelStream, intSpliterator, intStream, parallelStream, stream

Method Details

contains

public boolean contains(int k)

Description copied from class: AbstractIntCollection

Returns true if this collection contains the specified element.

Specified by:

contains in interface IntCollection

Overrides:

contains in class AbstractIntCollection

See Also:

• Collection.contains(Object)

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection<Integer>

Overrides:

toArray in class AbstractCollection<Integer>

toArray

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

Specified by:

toArray in interface Collection<Integer>

Overrides:

toArray in class AbstractCollection<Integer>

iterator

public IntBidirectionalIterator iterator()

Description copied from interface: IntCollection

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

Specified by:

iterator in interface Collection<Integer>

Specified by:

iterator in interface IntCollection

Specified by:

iterator in interface IntIterable

Specified by:

iterator in interface Iterable<Integer>

Specified by:

iterator in class AbstractIntCollection

Returns:

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

See Also:

• Iterable.iterator()

spliterator

public IntSpliterator spliterator()

Description copied from interface: IntCollection

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<Integer>

Specified by:

size in class AbstractCollection<Integer>

clear

public void clear()

Specified by:

clear in interface Collection<Integer>

Overrides:

clear in class AbstractCollection<Integer>

hashCode

public int hashCode()

Specified by:

hashCode in interface Collection<Integer>

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Specified by:

equals in interface Collection<Integer>

Overrides:

equals in class Object

forEach

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

Deprecated.

Description copied from interface: IntIterable

containsAll

public boolean containsAll(Collection<?> c)

Description copied from class: AbstractIntCollection

Specified by:

containsAll in interface Collection<Integer>

Overrides:

containsAll in class AbstractIntCollection

addAll

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

Description copied from class: AbstractIntCollection

Specified by:

addAll in interface Collection<Integer>

Overrides:

addAll in class AbstractIntCollection

removeAll

public boolean removeAll(Collection<?> c)

Description copied from class: AbstractIntCollection

Specified by:

removeAll in interface Collection<Integer>

Overrides:

removeAll in class AbstractIntCollection

retainAll

public boolean retainAll(Collection<?> c)

Description copied from class: AbstractIntCollection

Specified by:

retainAll in interface Collection<Integer>

Overrides:

retainAll in class AbstractIntCollection

removeIf

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

Deprecated.

Description copied from interface: IntCollection

toIntArray

public int[] toIntArray()

Description copied from interface: IntCollection

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

Specified by:

toIntArray in interface IntCollection

Overrides:

toIntArray in class AbstractIntCollection

Returns:

a primitive type array containing the items of this collection.

See Also:

• Collection.toArray()

toIntArray

@Deprecated
public int[] toIntArray(int[] a)

Deprecated.

Description copied from class: AbstractIntCollection

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:

toIntArray in interface IntCollection

Overrides:

toIntArray in class AbstractIntCollection

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(IntConsumer action)

Description copied from interface: IntIterable

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(IntCollection c)

Description copied from interface: IntCollection

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

Specified by:

containsAll in interface IntCollection

Overrides:

containsAll in class AbstractIntCollection

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(IntCollection c)

Description copied from interface: IntCollection

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

Specified by:

addAll in interface IntCollection

Overrides:

addAll in class AbstractIntCollection

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(IntCollection c)

Description copied from interface: IntCollection

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

Specified by:

removeAll in interface IntCollection

Overrides:

removeAll in class AbstractIntCollection

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(IntCollection c)

Description copied from interface: IntCollection

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

Specified by:

retainAll in interface IntCollection

Overrides:

retainAll in class AbstractIntCollection

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(IntPredicate filter)

Description copied from interface: IntCollection

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)