Package it.unimi.dsi.fastutil.ints

Class IntCollections.EmptyCollection

java.lang.Object
java.util.AbstractCollection<java.lang.Integer>
it.unimi.dsi.fastutil.ints.AbstractIntCollection
it.unimi.dsi.fastutil.ints.IntCollections.EmptyCollection
All Implemented Interfaces:
IntCollection, IntIterable, java.lang.Iterable<java.lang.Integer>, java.util.Collection<java.lang.Integer>
Direct Known Subclasses:
IntBigLists.EmptyBigList, IntLists.EmptyList, IntSets.EmptySet
Enclosing class:
IntCollections
public abstract static class IntCollections.EmptyCollection
extends AbstractIntCollection
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​(IntCollection c)
    Adds all elements of the given type-specific collection to this collection.
    boolean addAll​(java.util.Collection<? extends java.lang.Integer> c)
    void clear()  
    boolean contains​(int k)
    Returns true if this collection contains the specified element.
    boolean containsAll​(IntCollection 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.Integer> action)
    Deprecated.
    void forEach​(java.util.function.IntConsumer 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()  
    IntBidirectionalIterator iterator()
    Returns a type-specific iterator on the elements of this collection.
    boolean removeAll​(IntCollection c)
    Remove from this collection all elements in the given type-specific collection.
    boolean removeAll​(java.util.Collection<?> c)
    boolean removeIf​(java.util.function.IntPredicate filter)
    Remove from this collection all elements which satisfy the given predicate.
    boolean removeIf​(java.util.function.Predicate<? super java.lang.Integer> filter)
    Deprecated.
    boolean retainAll​(IntCollection c)
    Retains in this collection only elements from the given type-specific collection.
    boolean retainAll​(java.util.Collection<?> c)
    int size()  
    IntSpliterator spliterator()
    Returns a type-specific spliterator on the elements of this collection.
    java.lang.Object[] toArray()  
    <T> T[] toArray​(T[] array)  
    int[] toIntArray()
    Returns a primitive type array containing the items of this collection.
    int[] toIntArray​(int[] a)
    Deprecated.

    Methods inherited from class it.unimi.dsi.fastutil.ints.AbstractIntCollection

    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.ints.IntCollection

    intIterator, intParallelStream, intSpliterator, intStream, parallelStream, stream

  • Method Details

    • contains

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

    • toArray

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

    • toArray

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

    • iterator

      public IntBidirectionalIterator iterator()
      Description copied from interface: IntCollection
      Returns a type-specific iterator on the elements of this collection.
      Specified by:
      iterator in interface java.util.Collection<java.lang.Integer>
      Specified by:
      iterator in interface IntCollection
      Specified by:
      iterator in interface IntIterable
      Specified by:
      iterator in interface java.lang.Iterable<java.lang.Integer>
      Specified by:
      iterator in class AbstractIntCollection
      Returns:
      a type-specific iterator on the elements of this collection.
      See Also:
      Iterable.iterator()

    • spliterator

      public IntSpliterator spliterator()
      Description copied from interface: IntCollection
      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.Integer>
      Specified by:
      size in class java.util.AbstractCollection<java.lang.Integer>

    • clear

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

    • hashCode

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

    • forEach

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

    • containsAll

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

    • addAll

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

    • removeAll

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

    • retainAll

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

    • removeIf

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

    • toIntArray

      public int[] toIntArray()
      Description copied from interface: IntCollection
      Returns a primitive type array containing the items of this collection.
      Specified by:
      toIntArray in interface IntCollection
      Overrides:
      toIntArray in class AbstractIntCollection
      Returns:
      a primitive type array containing the items of this collection.
      See Also:
      Collection.toArray()

    • toIntArray

      @Deprecated public int[] toIntArray​(int[] a)
      Deprecated.
      Description copied from class: AbstractIntCollection
      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:
      toIntArray in interface IntCollection
      Overrides:
      toIntArray in class AbstractIntCollection
      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.IntConsumer action)
      Description copied from interface: IntIterable
      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​(IntCollection c)
      Description copied from interface: IntCollection
      Checks whether this collection contains all elements from the given type-specific collection.
      Specified by:
      containsAll in interface IntCollection
      Overrides:
      containsAll in class AbstractIntCollection
      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​(IntCollection c)
      Description copied from interface: IntCollection
      Adds all elements of the given type-specific collection to this collection.
      Specified by:
      addAll in interface IntCollection
      Overrides:
      addAll in class AbstractIntCollection
      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​(IntCollection c)
      Description copied from interface: IntCollection
      Remove from this collection all elements in the given type-specific collection.
      Specified by:
      removeAll in interface IntCollection
      Overrides:
      removeAll in class AbstractIntCollection
      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​(IntCollection c)
      Description copied from interface: IntCollection
      Retains in this collection only elements from the given type-specific collection.
      Specified by:
      retainAll in interface IntCollection
      Overrides:
      retainAll in class AbstractIntCollection
      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.IntPredicate filter)
      Description copied from interface: IntCollection
      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)