Package it.unimi.dsi.fastutil.doubles

Class DoubleCollections.EmptyCollection

java.lang.Object

java.util.AbstractCollection<Double>

it.unimi.dsi.fastutil.doubles.AbstractDoubleCollection

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

All Implemented Interfaces:

DoubleCollection, DoubleIterable, Iterable<Double>, Collection<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	Description
boolean	addAll(DoubleCollection c)	Adds all elements of the given type-specific collection to this collection.
boolean	addAll(Collection<? extends Double> c)
void	clear()
boolean	contains(double k)	Returns true if this collection contains the specified element.
boolean	containsAll(DoubleCollection 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 Double> action)	Deprecated.
void	forEach(DoubleConsumer 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()
DoubleBidirectionalIterator	iterator()	Returns a type-specific iterator on the elements of this collection.
boolean	removeAll(DoubleCollection c)	Remove from this collection all elements in the given type-specific collection.
boolean	removeAll(Collection<?> c)
boolean	removeIf(DoublePredicate filter)	Remove from this collection all elements which satisfy the given predicate.
boolean	removeIf(Predicate<? super Double> filter)	Deprecated.
boolean	retainAll(DoubleCollection c)	Retains in this collection only elements from the given type-specific collection.
boolean	retainAll(Collection<?> c)
int	size()
DoubleSpliterator	spliterator()	Returns a type-specific spliterator on the elements of this collection.
Object[]	toArray()
<T> T[]	toArray(T[] array)
double[]	toDoubleArray()	Returns a primitive type array containing the items of this collection.
double[]	toDoubleArray(double[] a)	Deprecated.

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

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.doubles.DoubleCollection

doubleIterator, doubleParallelStream, doubleSpliterator, doubleStream, parallelStream, stream

Method Details

contains

public boolean contains(double k)

Description copied from class: AbstractDoubleCollection

Returns true if this collection contains the specified element.

Specified by:

contains in interface DoubleCollection

Overrides:

contains in class AbstractDoubleCollection

See Also:

• Collection.contains(Object)

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection<Double>

Overrides:

toArray in class AbstractCollection<Double>

toArray

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

Specified by:

toArray in interface Collection<Double>

Overrides:

toArray in class AbstractCollection<Double>

iterator

public DoubleBidirectionalIterator iterator()

Description copied from interface: DoubleCollection

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

Specified by:

iterator in interface Collection<Double>

Specified by:

iterator in interface DoubleCollection

Specified by:

iterator in interface DoubleIterable

Specified by:

iterator in interface Iterable<Double>

Specified by:

iterator in class AbstractDoubleCollection

Returns:

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

See Also:

• Iterable.iterator()

spliterator

public DoubleSpliterator spliterator()

Description copied from interface: DoubleCollection

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<Double>

Specified by:

size in class AbstractCollection<Double>

clear

public void clear()

Specified by:

clear in interface Collection<Double>

Overrides:

clear in class AbstractCollection<Double>

hashCode

public int hashCode()

Specified by:

hashCode in interface Collection<Double>

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Specified by:

equals in interface Collection<Double>

Overrides:

equals in class Object

forEach

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

Deprecated.

Description copied from interface: DoubleIterable

containsAll

public boolean containsAll(Collection<?> c)

Description copied from class: AbstractDoubleCollection

Specified by:

containsAll in interface Collection<Double>

Overrides:

containsAll in class AbstractDoubleCollection

addAll

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

Description copied from class: AbstractDoubleCollection

Specified by:

addAll in interface Collection<Double>

Overrides:

addAll in class AbstractDoubleCollection

removeAll

public boolean removeAll(Collection<?> c)

Description copied from class: AbstractDoubleCollection

Specified by:

removeAll in interface Collection<Double>

Overrides:

removeAll in class AbstractDoubleCollection

retainAll

public boolean retainAll(Collection<?> c)

Description copied from class: AbstractDoubleCollection

Specified by:

retainAll in interface Collection<Double>

Overrides:

retainAll in class AbstractDoubleCollection

removeIf

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

Deprecated.

Description copied from interface: DoubleCollection

toDoubleArray

public double[] toDoubleArray()

Description copied from interface: DoubleCollection

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

Specified by:

toDoubleArray in interface DoubleCollection

Overrides:

toDoubleArray in class AbstractDoubleCollection

Returns:

a primitive type array containing the items of this collection.

See Also:

• Collection.toArray()

toDoubleArray

@Deprecated
public double[] toDoubleArray(double[] a)

Deprecated.

Description copied from class: AbstractDoubleCollection

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:

toDoubleArray in interface DoubleCollection

Overrides:

toDoubleArray in class AbstractDoubleCollection

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(DoubleConsumer action)

Description copied from interface: DoubleIterable

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(DoubleCollection c)

Description copied from interface: DoubleCollection

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

Specified by:

containsAll in interface DoubleCollection

Overrides:

containsAll in class AbstractDoubleCollection

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(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)

removeIf

public boolean removeIf(DoublePredicate filter)

Description copied from interface: DoubleCollection

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)