Package it.unimi.dsi.fastutil.chars

Class CharCollections.EmptyCollection

java.lang.Object

java.util.AbstractCollection<Character>

it.unimi.dsi.fastutil.chars.AbstractCharCollection

it.unimi.dsi.fastutil.chars.CharCollections.EmptyCollection

All Implemented Interfaces:

CharCollection, CharIterable, Iterable<Character>, Collection<Character>

Direct Known Subclasses:

CharBigLists.EmptyBigList, CharLists.EmptyList, CharSets.EmptySet

Enclosing class:

CharCollections

public abstract static class CharCollections.EmptyCollection
extends AbstractCharCollection

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(CharCollection c)	Adds all elements of the given type-specific collection to this collection.
boolean	addAll(Collection<? extends Character> c)
void	clear()
boolean	contains(char k)	Returns true if this collection contains the specified element.
boolean	containsAll(CharCollection c)	Checks whether this collection contains all elements from the given type-specific collection.
boolean	containsAll(Collection<?> c)
boolean	equals(Object o)
void	forEach(CharConsumer 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.
void	forEach(Consumer<? super Character> action)	Deprecated.
int	hashCode()
IntIterator	intIterator()	Returns a widened primitive iterator on the elements of this collection.
IntSpliterator	intSpliterator()	Returns widened primitive spliterator on the elements of this collection.
CharBidirectionalIterator	iterator()	Returns a type-specific iterator on the elements of this collection.
boolean	removeAll(CharCollection c)	Remove from this collection all elements in the given type-specific collection.
boolean	removeAll(Collection<?> c)
boolean	removeIf(CharPredicate filter)	Remove from this collection all elements which satisfy the given predicate.
boolean	removeIf(Predicate<? super Character> filter)	Deprecated.
boolean	retainAll(CharCollection c)	Retains in this collection only elements from the given type-specific collection.
boolean	retainAll(Collection<?> c)
int	size()
CharSpliterator	spliterator()	Returns a type-specific spliterator on the elements of this collection.
Object[]	toArray()
<T> T[]	toArray(T[] array)
char[]	toCharArray()	Returns a primitive type array containing the items of this collection.
char[]	toCharArray(char[] a)	Deprecated.

Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractCharCollection

add, add, contains, rem, remove, 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 it.unimi.dsi.fastutil.chars.CharCollection

intParallelStream, intStream, parallelStream, removeIf, stream

Methods inherited from interface it.unimi.dsi.fastutil.chars.CharIterable

forEach

Methods inherited from interface java.util.Collection

isEmpty, toArray

Method Details

contains

public boolean contains(char k)

Description copied from class: AbstractCharCollection

Returns true if this collection contains the specified element.

Specified by:

contains in interface CharCollection

Overrides:

contains in class AbstractCharCollection

See Also:

• Collection.contains(Object)

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection<Character>

Overrides:

toArray in class AbstractCollection<Character>

toArray

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

Specified by:

toArray in interface Collection<Character>

Overrides:

toArray in class AbstractCollection<Character>

iterator

public CharBidirectionalIterator iterator()

Description copied from interface: CharCollection

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

Specified by:

iterator in interface CharCollection

Specified by:

iterator in interface CharIterable

Specified by:

iterator in interface Collection<Character>

Specified by:

iterator in interface Iterable<Character>

Specified by:

iterator in class AbstractCharCollection

Returns:

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

See Also:

• Iterable.iterator()

spliterator

public CharSpliterator spliterator()

Description copied from interface: CharCollection

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<Character>

Specified by:

size in class AbstractCollection<Character>

clear

public void clear()

Specified by:

clear in interface Collection<Character>

Overrides:

clear in class AbstractCollection<Character>

hashCode

public int hashCode()

Specified by:

hashCode in interface Collection<Character>

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Specified by:

equals in interface Collection<Character>

Overrides:

equals in class Object

forEach

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

Deprecated.

Description copied from interface: CharIterable

containsAll

public boolean containsAll(Collection<?> c)

Description copied from class: AbstractCharCollection

Specified by:

containsAll in interface Collection<Character>

Overrides:

containsAll in class AbstractCharCollection

addAll

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

Description copied from class: AbstractCharCollection

Specified by:

addAll in interface Collection<Character>

Overrides:

addAll in class AbstractCharCollection

removeAll

public boolean removeAll(Collection<?> c)

Description copied from class: AbstractCharCollection

Specified by:

removeAll in interface Collection<Character>

Overrides:

removeAll in class AbstractCharCollection

retainAll

public boolean retainAll(Collection<?> c)

Description copied from class: AbstractCharCollection

Specified by:

retainAll in interface Collection<Character>

Overrides:

retainAll in class AbstractCharCollection

removeIf

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

Deprecated.

Description copied from interface: CharCollection

toCharArray

public char[] toCharArray()

Description copied from interface: CharCollection

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

Specified by:

toCharArray in interface CharCollection

Overrides:

toCharArray in class AbstractCharCollection

Returns:

a primitive type array containing the items of this collection.

See Also:

• Collection.toArray()

toCharArray

@Deprecated
public char[] toCharArray(char[] a)

Deprecated.

Description copied from class: AbstractCharCollection

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:

toCharArray in interface CharCollection

Overrides:

toCharArray in class AbstractCharCollection

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(CharConsumer action)

Description copied from interface: CharIterable

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(CharCollection c)

Description copied from interface: CharCollection

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

Specified by:

containsAll in interface CharCollection

Overrides:

containsAll in class AbstractCharCollection

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(CharCollection c)

Description copied from interface: CharCollection

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

Specified by:

addAll in interface CharCollection

Overrides:

addAll in class AbstractCharCollection

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(CharCollection c)

Description copied from interface: CharCollection

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

Specified by:

removeAll in interface CharCollection

Overrides:

removeAll in class AbstractCharCollection

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(CharCollection c)

Description copied from interface: CharCollection

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

Specified by:

retainAll in interface CharCollection

Overrides:

retainAll in class AbstractCharCollection

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(CharPredicate filter)

Description copied from interface: CharCollection

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)

intIterator

public IntIterator intIterator()

Description copied from interface: CharCollection

Returns a widened primitive iterator on the elements of this collection.

This method is provided for the purpose of APIs that expect only the JDK's primitive iterators, of which there are only int, long, and double.

WARNING: This is not the same as converting the source to a sequence of code points. This returned instance literally performs (int)(charValue) casts. Surrogate pairs will be left as separate elements instead of combined into a single element with the code point it represents. See Character for more discussion on code points, char values, and surrogate pairs.

Returns:

a widened primitive iterator on the elements of this collection.

intSpliterator

public IntSpliterator intSpliterator()

Description copied from interface: CharCollection

Returns widened primitive spliterator on the elements of this collection.

This method is provided for the purpose of APIs that expect only the JDK's primitive spliterators, of which there are only int, long, and double.

WARNING: This is not the same as converting the source to a sequence of code points. This returned instance literally performs (int)(charValue) casts. Surrogate pairs will be left as separate elements instead of combined into a single element with the code point it represents. See Character for more discussion on code points, char values, and surrogate pairs.

Returns:

a widened primitive spliterator on the elements of this collection.