it.unimi.dsi.fastutil.longs.LongCollections.EmptyCollection

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.

Method Summary

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)`	Returns `true` 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()`

Methods inherited from class it.unimi.dsi.fastutil.longs.AbstractLongCollection

add, add, contains, containsAll, rem, remove, toArray, toLongArray, toLongArray, 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 java.util.Collection

containsAll, isEmpty, parallelStream, spliterator, stream, toArray, toArray

Methods inherited from interface it.unimi.dsi.fastutil.longs.LongCollection

removeIf, removeIf

Methods inherited from interface it.unimi.dsi.fastutil.longs.LongIterable

forEach, forEach

Method Details
- contains
  
  public boolean contains(long k)
  
  Description copied from class: AbstractLongCollection
  
  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 LongCollection
  
  Overrides:
  
  contains in class AbstractLongCollection
  
  See Also:
  
  Collection.contains(Object)
- toArray
  
  public Object[] toArray()
  
  Specified by:
  
  toArray in interface Collection<Long>
  
  Overrides:
  
  toArray in class AbstractCollection<Long>
- 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 extends Collection.
  
  Specified by:
  
  iterator in interface Collection<Long>
  
  Specified by:
  
  iterator in interface Iterable<Long>
  
  Specified by:
  
  iterator in interface LongCollection
  
  Specified by:
  
  iterator in interface LongIterable
  
  Specified by:
  
  iterator in class AbstractLongCollection
  
  Returns:
  
  a type-specific iterator on the elements of this collection.
  
  See Also:
  
  Iterable.iterator()
- size
  
  public int size()
  
  Specified by:
  
  size in interface Collection<Long>
  
  Specified by:
  
  size in class AbstractCollection<Long>
- clear
  
  public void clear()
  
  Specified by:
  
  clear in interface Collection<Long>
  
  Overrides:
  
  clear in class AbstractCollection<Long>
- hashCode
  
  public int hashCode()
  
  Specified by:
  
  hashCode in interface Collection<Long>
  
  Overrides:
  
  hashCode in class Object
- equals
  
  public boolean equals(Object o)
  
  Specified by:
  
  equals in interface Collection<Long>
  
  Overrides:
  
  equals in class Object
- addAll
  
  public boolean addAll(Collection<? extends Long> c)
  
  Specified by:
  
  addAll in interface Collection<Long>
  
  Overrides:
  
  addAll in class AbstractCollection<Long>
- removeAll
  
  public boolean removeAll(Collection<?> c)
  
  Specified by:
  
  removeAll in interface Collection<Long>
  
  Overrides:
  
  removeAll in class AbstractCollection<Long>
- retainAll
  
  public boolean retainAll(Collection<?> c)
  
  Specified by:
  
  retainAll in interface Collection<Long>
  
  Overrides:
  
  retainAll in class AbstractCollection<Long>
- 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 interface LongCollection
  
  Overrides:
  
  addAll in class AbstractLongCollection
  
  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(LongCollection c)
  
  Description copied from interface: LongCollection
  
  Remove from this collection all elements in the given type-specific collection.
  
  Specified by:
  
  removeAll in interface LongCollection
  
  Overrides:
  
  removeAll in class AbstractLongCollection
  
  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(LongCollection c)
  
  Description copied from interface: LongCollection
  
  Retains in this collection only elements from the given type-specific collection.
  
  Specified by:
  
  retainAll in interface LongCollection
  
  Overrides:
  
  retainAll in class AbstractLongCollection
  
  Parameters:
  
  c - a type-specific collection.
  
  Returns:
  
  true if this collection changed as a result of the call.
  
  See Also:
  
  Collection.retainAll(Collection)

Class LongCollections.EmptyCollection