Package 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.
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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(java.util.Collection<? extends java.lang.Double> c)
void
clear()
boolean
contains(double k)
Returnstrue
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(java.util.Collection<?> c)
boolean
equals(java.lang.Object o)
void
forEach(java.util.function.Consumer<? super java.lang.Double> action)
Deprecated.void
forEach(java.util.function.DoubleConsumer action)
Performs the given action for each element of this type-specificIterable
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(java.util.Collection<?> c)
boolean
removeIf(java.util.function.DoublePredicate filter)
Remove from this collection all elements which satisfy the given predicate.boolean
removeIf(java.util.function.Predicate<? super java.lang.Double> filter)
Deprecated.boolean
retainAll(DoubleCollection c)
Retains in this collection only elements from the given type-specific collection.boolean
retainAll(java.util.Collection<?> c)
int
size()
DoubleSpliterator
spliterator()
Returns a type-specific spliterator on the elements of this collection.java.lang.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
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Method Details
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contains
public boolean contains(double k)Description copied from class:AbstractDoubleCollection
Returnstrue
if this collection contains the specified element.- Specified by:
contains
in interfaceDoubleCollection
- Overrides:
contains
in classAbstractDoubleCollection
- See Also:
Collection.contains(Object)
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toArray
public java.lang.Object[] toArray()- Specified by:
toArray
in interfacejava.util.Collection<java.lang.Double>
- Overrides:
toArray
in classjava.util.AbstractCollection<java.lang.Double>
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toArray
public <T> T[] toArray(T[] array)- Specified by:
toArray
in interfacejava.util.Collection<java.lang.Double>
- Overrides:
toArray
in classjava.util.AbstractCollection<java.lang.Double>
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iterator
Description copied from interface:DoubleCollection
Returns a type-specific iterator on the elements of this collection.- Specified by:
iterator
in interfacejava.util.Collection<java.lang.Double>
- Specified by:
iterator
in interfaceDoubleCollection
- Specified by:
iterator
in interfaceDoubleIterable
- Specified by:
iterator
in interfacejava.lang.Iterable<java.lang.Double>
- Specified by:
iterator
in classAbstractDoubleCollection
- Returns:
- a type-specific iterator on the elements of this collection.
- See Also:
Iterable.iterator()
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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.
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size
public int size()- Specified by:
size
in interfacejava.util.Collection<java.lang.Double>
- Specified by:
size
in classjava.util.AbstractCollection<java.lang.Double>
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clear
public void clear()- Specified by:
clear
in interfacejava.util.Collection<java.lang.Double>
- Overrides:
clear
in classjava.util.AbstractCollection<java.lang.Double>
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hashCode
public int hashCode()- Specified by:
hashCode
in interfacejava.util.Collection<java.lang.Double>
- Overrides:
hashCode
in classjava.lang.Object
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equals
public boolean equals(java.lang.Object o)- Specified by:
equals
in interfacejava.util.Collection<java.lang.Double>
- Overrides:
equals
in classjava.lang.Object
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forEach
@Deprecated public void forEach(java.util.function.Consumer<? super java.lang.Double> action)Deprecated.Description copied from interface:DoubleIterable
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containsAll
public boolean containsAll(java.util.Collection<?> c)Description copied from class:AbstractDoubleCollection
- Specified by:
containsAll
in interfacejava.util.Collection<java.lang.Double>
- Overrides:
containsAll
in classAbstractDoubleCollection
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addAll
public boolean addAll(java.util.Collection<? extends java.lang.Double> c)Description copied from class:AbstractDoubleCollection
- Specified by:
addAll
in interfacejava.util.Collection<java.lang.Double>
- Overrides:
addAll
in classAbstractDoubleCollection
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removeAll
public boolean removeAll(java.util.Collection<?> c)Description copied from class:AbstractDoubleCollection
- Specified by:
removeAll
in interfacejava.util.Collection<java.lang.Double>
- Overrides:
removeAll
in classAbstractDoubleCollection
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retainAll
public boolean retainAll(java.util.Collection<?> c)Description copied from class:AbstractDoubleCollection
- Specified by:
retainAll
in interfacejava.util.Collection<java.lang.Double>
- Overrides:
retainAll
in classAbstractDoubleCollection
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removeIf
@Deprecated public boolean removeIf(java.util.function.Predicate<? super java.lang.Double> filter)Deprecated.Description copied from interface:DoubleCollection
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toDoubleArray
public double[] toDoubleArray()Description copied from interface:DoubleCollection
Returns a primitive type array containing the items of this collection.- Specified by:
toDoubleArray
in interfaceDoubleCollection
- Overrides:
toDoubleArray
in classAbstractDoubleCollection
- Returns:
- a primitive type array containing the items of this collection.
- See Also:
Collection.toArray()
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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 interfaceDoubleCollection
- Overrides:
toDoubleArray
in classAbstractDoubleCollection
- 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[])
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forEach
public void forEach(java.util.function.DoubleConsumer action)Description copied from interface:DoubleIterable
Performs the given action for each element of this type-specificIterable
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)
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containsAll
Description copied from interface:DoubleCollection
Checks whether this collection contains all elements from the given type-specific collection.- Specified by:
containsAll
in interfaceDoubleCollection
- Overrides:
containsAll
in classAbstractDoubleCollection
- Parameters:
c
- a type-specific collection.- Returns:
true
if this collection contains all elements of the argument.- See Also:
Collection.containsAll(Collection)
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addAll
Description copied from interface:DoubleCollection
Adds all elements of the given type-specific collection to this collection.- Specified by:
addAll
in interfaceDoubleCollection
- Overrides:
addAll
in classAbstractDoubleCollection
- Parameters:
c
- a type-specific collection.- Returns:
true
if this collection changed as a result of the call.- See Also:
Collection.addAll(Collection)
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removeAll
Description copied from interface:DoubleCollection
Remove from this collection all elements in the given type-specific collection.- Specified by:
removeAll
in interfaceDoubleCollection
- Overrides:
removeAll
in classAbstractDoubleCollection
- Parameters:
c
- a type-specific collection.- Returns:
true
if this collection changed as a result of the call.- See Also:
Collection.removeAll(Collection)
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retainAll
Description copied from interface:DoubleCollection
Retains in this collection only elements from the given type-specific collection.- Specified by:
retainAll
in interfaceDoubleCollection
- Overrides:
retainAll
in classAbstractDoubleCollection
- Parameters:
c
- a type-specific collection.- Returns:
true
if this collection changed as a result of the call.- See Also:
Collection.retainAll(Collection)
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removeIf
public boolean removeIf(java.util.function.DoublePredicate filter)Description copied from interface:DoubleCollection
Remove from this collection all elements which satisfy the given predicate.- Parameters:
filter
- a predicate which returnstrue
for elements to be removed.- Returns:
true
if any elements were removed.- See Also:
Collection.removeIf(java.util.function.Predicate)
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