Package it.unimi.dsi.fastutil.longs

Class LongCollections.EmptyCollection

java.lang.Object
java.util.AbstractCollection<java.lang.Long>
it.unimi.dsi.fastutil.longs.AbstractLongCollection
it.unimi.dsi.fastutil.longs.LongCollections.EmptyCollection
All Implemented Interfaces:
LongCollection, LongIterable, java.lang.Iterable<java.lang.Long>, java.util.Collection<java.lang.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​(java.util.Collection<? extends java.lang.Long> c)
    void clear()  
    boolean contains​(long k)
    Returns true if this collection contains the specified element.
    boolean containsAll​(LongCollection 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.Long> action)
    Deprecated.
    void forEach​(java.util.function.LongConsumer 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()  
    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​(java.util.Collection<?> c)
    boolean removeIf​(java.util.function.LongPredicate filter)
    Remove from this collection all elements which satisfy the given predicate.
    boolean removeIf​(java.util.function.Predicate<? super java.lang.Long> filter)
    Deprecated.
    boolean retainAll​(LongCollection c)
    Retains in this collection only elements from the given type-specific collection.
    boolean retainAll​(java.util.Collection<?> c)
    int size()  
    LongSpliterator spliterator()
    Returns a type-specific spliterator on the elements of this collection.
    java.lang.Object[] toArray()  
    <T> T[] toArray​(T[] array)  
    long[] toLongArray()
    Returns a primitive type array containing the items of this collection.
    long[] toLongArray​(long[] a)
    Deprecated.

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

    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.longs.LongCollection

    longIterator, longParallelStream, longSpliterator, longStream, parallelStream, stream

  • Method Details

    • contains

      public boolean contains​(long k)
      Description copied from class: AbstractLongCollection
      Returns true if this collection contains the specified element.
      Specified by:
      contains in interface LongCollection
      Overrides:
      contains in class AbstractLongCollection
      See Also:
      Collection.contains(Object)

    • toArray

      public java.lang.Object[] toArray()
      Specified by:
      toArray in interface java.util.Collection<java.lang.Long>
      Overrides:
      toArray in class java.util.AbstractCollection<java.lang.Long>

    • toArray

      public <T> T[] toArray​(T[] array)
      Specified by:
      toArray in interface java.util.Collection<java.lang.Long>
      Overrides:
      toArray in class java.util.AbstractCollection<java.lang.Long>

    • iterator

      public LongBidirectionalIterator iterator()
      Description copied from interface: LongCollection
      Returns a type-specific iterator on the elements of this collection.
      Specified by:
      iterator in interface java.util.Collection<java.lang.Long>
      Specified by:
      iterator in interface java.lang.Iterable<java.lang.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()

    • spliterator

      public LongSpliterator spliterator()
      Description copied from interface: LongCollection
      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 java.util.Collection<java.lang.Long>
      Specified by:
      size in class java.util.AbstractCollection<java.lang.Long>

    • clear

      public void clear()
      Specified by:
      clear in interface java.util.Collection<java.lang.Long>
      Overrides:
      clear in class java.util.AbstractCollection<java.lang.Long>

    • hashCode

      public int hashCode()
      Specified by:
      hashCode in interface java.util.Collection<java.lang.Long>
      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.Long>
      Overrides:
      equals in class java.lang.Object

    • forEach

      @Deprecated public void forEach​(java.util.function.Consumer<? super java.lang.Long> action)
      Deprecated.
      Description copied from interface: LongIterable

    • containsAll

      public boolean containsAll​(java.util.Collection<?> c)
      Description copied from class: AbstractLongCollection
      Specified by:
      containsAll in interface java.util.Collection<java.lang.Long>
      Overrides:
      containsAll in class AbstractLongCollection

    • addAll

      public boolean addAll​(java.util.Collection<? extends java.lang.Long> c)
      Description copied from class: AbstractLongCollection
      Specified by:
      addAll in interface java.util.Collection<java.lang.Long>
      Overrides:
      addAll in class AbstractLongCollection

    • removeAll

      public boolean removeAll​(java.util.Collection<?> c)
      Description copied from class: AbstractLongCollection
      Specified by:
      removeAll in interface java.util.Collection<java.lang.Long>
      Overrides:
      removeAll in class AbstractLongCollection

    • retainAll

      public boolean retainAll​(java.util.Collection<?> c)
      Description copied from class: AbstractLongCollection
      Specified by:
      retainAll in interface java.util.Collection<java.lang.Long>
      Overrides:
      retainAll in class AbstractLongCollection

    • removeIf

      @Deprecated public boolean removeIf​(java.util.function.Predicate<? super java.lang.Long> filter)
      Deprecated.
      Description copied from interface: LongCollection

    • toLongArray

      public long[] toLongArray()
      Description copied from interface: LongCollection
      Returns a primitive type array containing the items of this collection.
      Specified by:
      toLongArray in interface LongCollection
      Overrides:
      toLongArray in class AbstractLongCollection
      Returns:
      a primitive type array containing the items of this collection.
      See Also:
      Collection.toArray()

    • toLongArray

      @Deprecated public long[] toLongArray​(long[] a)
      Deprecated.
      Description copied from class: AbstractLongCollection
      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:
      toLongArray in interface LongCollection
      Overrides:
      toLongArray in class AbstractLongCollection
      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​(java.util.function.LongConsumer action)
      Description copied from interface: LongIterable
      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​(LongCollection c)
      Description copied from interface: LongCollection
      Checks whether this collection contains all elements from the given type-specific collection.
      Specified by:
      containsAll in interface LongCollection
      Overrides:
      containsAll in class AbstractLongCollection
      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​(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)

    • removeIf

      public boolean removeIf​(java.util.function.LongPredicate filter)
      Description copied from interface: LongCollection
      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)