Package it.unimi.dsi.fastutil.longs
Class LongCollections.EmptyCollection
- java.lang.Object
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- java.util.AbstractCollection<Long>
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- it.unimi.dsi.fastutil.longs.AbstractLongCollection
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- it.unimi.dsi.fastutil.longs.LongCollections.EmptyCollection
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- All Implemented Interfaces:
LongCollection
,LongIterable
,Iterable<Long>
,Collection<Long>
- Direct Known Subclasses:
LongBigLists.EmptyBigList
,LongLists.EmptyList
,LongSets.EmptySet
- Enclosing class:
- LongCollections
public abstract static class LongCollections.EmptyCollection extends AbstractLongCollection
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
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
addAll(LongCollection c)
Adds all elements of the given type-specific collection to this collection.boolean
addAll(Collection<? extends Long> c)
void
clear()
boolean
contains(long k)
Returnstrue
if this collection contains the specified element.boolean
equals(Object o)
int
hashCode()
LongBidirectionalIterator
iterator()
Returns a type-specific iterator on the elements of this collection.boolean
removeAll(LongCollection c)
Remove from this collection all elements in the given type-specific collection.boolean
removeAll(Collection<?> c)
boolean
retainAll(LongCollection c)
Retains in this collection only elements from the given type-specific collection.boolean
retainAll(Collection<?> c)
int
size()
Object[]
toArray()
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Methods inherited from class it.unimi.dsi.fastutil.longs.AbstractLongCollection
add, add, contains, containsAll, rem, remove, toArray, toLongArray, toLongArray, toString
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Methods inherited from class java.util.AbstractCollection
containsAll, isEmpty, toArray
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Methods inherited from interface java.util.Collection
containsAll, isEmpty, parallelStream, spliterator, stream, toArray, toArray
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Methods inherited from interface it.unimi.dsi.fastutil.longs.LongCollection
removeIf, removeIf
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Methods inherited from interface it.unimi.dsi.fastutil.longs.LongIterable
forEach, forEach
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Method Detail
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contains
public boolean contains(long k)
Description copied from class:AbstractLongCollection
Returnstrue
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 interfaceLongCollection
- Overrides:
contains
in classAbstractLongCollection
- See Also:
Collection.contains(Object)
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toArray
public Object[] toArray()
- Specified by:
toArray
in interfaceCollection<Long>
- Overrides:
toArray
in classAbstractCollection<Long>
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iterator
public LongBidirectionalIterator iterator()
Description copied from interface:LongCollection
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 extendsCollection
.- Specified by:
iterator
in interfaceCollection<Long>
- Specified by:
iterator
in interfaceIterable<Long>
- Specified by:
iterator
in interfaceLongCollection
- Specified by:
iterator
in interfaceLongIterable
- Specified by:
iterator
in classAbstractLongCollection
- Returns:
- a type-specific iterator on the elements of this collection.
- See Also:
Iterable.iterator()
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size
public int size()
- Specified by:
size
in interfaceCollection<Long>
- Specified by:
size
in classAbstractCollection<Long>
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clear
public void clear()
- Specified by:
clear
in interfaceCollection<Long>
- Overrides:
clear
in classAbstractCollection<Long>
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hashCode
public int hashCode()
- Specified by:
hashCode
in interfaceCollection<Long>
- Overrides:
hashCode
in classObject
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equals
public boolean equals(Object o)
- Specified by:
equals
in interfaceCollection<Long>
- Overrides:
equals
in classObject
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addAll
public boolean addAll(Collection<? extends Long> c)
- Specified by:
addAll
in interfaceCollection<Long>
- Overrides:
addAll
in classAbstractCollection<Long>
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removeAll
public boolean removeAll(Collection<?> c)
- Specified by:
removeAll
in interfaceCollection<Long>
- Overrides:
removeAll
in classAbstractCollection<Long>
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retainAll
public boolean retainAll(Collection<?> c)
- Specified by:
retainAll
in interfaceCollection<Long>
- Overrides:
retainAll
in classAbstractCollection<Long>
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addAll
public boolean addAll(LongCollection c)
Description copied from interface:LongCollection
Adds all elements of the given type-specific collection to this collection.- Specified by:
addAll
in interfaceLongCollection
- Overrides:
addAll
in classAbstractLongCollection
- 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
public boolean removeAll(LongCollection c)
Description copied from interface:LongCollection
Remove from this collection all elements in the given type-specific collection.- Specified by:
removeAll
in interfaceLongCollection
- Overrides:
removeAll
in classAbstractLongCollection
- 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
public boolean retainAll(LongCollection c)
Description copied from interface:LongCollection
Retains in this collection only elements from the given type-specific collection.- Specified by:
retainAll
in interfaceLongCollection
- Overrides:
retainAll
in classAbstractLongCollection
- 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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