it.unimi.dsi.fastutil.doubles

Class DoubleCollections.EmptyCollection

java.lang.Object

java.util.AbstractCollection<java.lang.Double>

it.unimi.dsi.fastutil.doubles.AbstractDoubleCollection

it.unimi.dsi.fastutil.doubles.DoubleCollections.EmptyCollection

All Implemented Interfaces:

DoubleCollection, DoubleIterable, java.lang.Iterable<java.lang.Double>, java.util.Collection<java.lang.Double>

Direct Known Subclasses:

DoubleBigLists.EmptyBigList, DoubleLists.EmptyList, DoubleSets.EmptySet

Enclosing class:

DoubleCollections

public abstract static class DoubleCollections.EmptyCollection
extends AbstractDoubleCollection

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 and Description
boolean	addAll(java.util.Collection<? extends java.lang.Double> c)
boolean	addAll(DoubleCollection c) Adds all elements of the given type-specific collection to this collection.
void	clear()
boolean	contains(double k) Returns true if this collection contains the specified element.
boolean	equals(java.lang.Object o)
int	hashCode()
DoubleBidirectionalIterator	iterator() Returns a type-specific iterator on the elements of this collection.
boolean	removeAll(java.util.Collection<?> c)
boolean	removeAll(DoubleCollection c) Remove from this collection all elements in the given type-specific collection.
boolean	retainAll(java.util.Collection<?> c)
boolean	retainAll(DoubleCollection c) Retains in this collection only elements from the given type-specific collection.
int	size()
java.lang.Object[]	toArray()

Methods inherited from class it.unimi.dsi.fastutil.doubles.AbstractDoubleCollection

add, add, contains, containsAll, rem, remove, toArray, toDoubleArray, toDoubleArray, toString

Methods inherited from class java.util.AbstractCollection

containsAll, isEmpty, toArray

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.doubles.DoubleCollection

removeIf, removeIf

Methods inherited from interface java.util.Collection

containsAll, isEmpty, parallelStream, spliterator, stream, toArray

Methods inherited from interface it.unimi.dsi.fastutil.doubles.DoubleIterable

forEach, forEach

Method Detail

contains

public boolean contains(double k)

Description copied from class: AbstractDoubleCollection

Returns true if this collection contains the specified element.

This implementation iterates over the elements in the collection, looking for the specified element.

Specified by:

contains in interface DoubleCollection

Overrides:

contains in class AbstractDoubleCollection

See Also:

Collection.contains(Object)

toArray

public java.lang.Object[] toArray()

Specified by:

toArray in interface java.util.Collection<java.lang.Double>

Overrides:

toArray in class java.util.AbstractCollection<java.lang.Double>

iterator

public DoubleBidirectionalIterator iterator()

Description copied from interface: DoubleCollection

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

Note that this specification strengthens the one given in Iterable.iterator(), which was already strengthened in the corresponding type-specific class, but was weakened by the fact that this interface extends Collection.

Specified by:

iterator in interface DoubleCollection

Specified by:

iterator in interface DoubleIterable

Specified by:

iterator in interface java.lang.Iterable<java.lang.Double>

Specified by:

iterator in interface java.util.Collection<java.lang.Double>

Specified by:

iterator in class AbstractDoubleCollection

Returns:

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

See Also:

Iterable.iterator()

size

public int size()

Specified by:

size in interface java.util.Collection<java.lang.Double>

Specified by:

size in class java.util.AbstractCollection<java.lang.Double>

clear

public void clear()

Specified by:

clear in interface java.util.Collection<java.lang.Double>

Overrides:

clear in class java.util.AbstractCollection<java.lang.Double>

hashCode

public int hashCode()

Specified by:

hashCode in interface java.util.Collection<java.lang.Double>

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Specified by:

equals in interface java.util.Collection<java.lang.Double>

Overrides:

equals in class java.lang.Object

addAll

public boolean addAll(java.util.Collection<? extends java.lang.Double> c)

Specified by:

addAll in interface java.util.Collection<java.lang.Double>

Overrides:

addAll in class java.util.AbstractCollection<java.lang.Double>

removeAll

public boolean removeAll(java.util.Collection<?> c)

Specified by:

removeAll in interface java.util.Collection<java.lang.Double>

Overrides:

removeAll in class java.util.AbstractCollection<java.lang.Double>

retainAll

public boolean retainAll(java.util.Collection<?> c)

Specified by:

retainAll in interface java.util.Collection<java.lang.Double>

Overrides:

retainAll in class java.util.AbstractCollection<java.lang.Double>

addAll

public boolean addAll(DoubleCollection c)

Description copied from interface: DoubleCollection

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

Specified by:

addAll in interface DoubleCollection

Overrides:

addAll in class AbstractDoubleCollection

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(DoubleCollection c)

Description copied from interface: DoubleCollection

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

Specified by:

removeAll in interface DoubleCollection

Overrides:

removeAll in class AbstractDoubleCollection

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(DoubleCollection c)

Description copied from interface: DoubleCollection

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

Specified by:

retainAll in interface DoubleCollection

Overrides:

retainAll in class AbstractDoubleCollection

Parameters:

c - a type-specific collection.

Returns:

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

See Also:

Collection.retainAll(Collection)