Package it.unimi.dsi.fastutil.chars

Class CharCollections.EmptyCollection

java.lang.Object
java.util.AbstractCollection<java.lang.Character>
it.unimi.dsi.fastutil.chars.AbstractCharCollection
it.unimi.dsi.fastutil.chars.CharCollections.EmptyCollection
All Implemented Interfaces:
CharCollection, it.unimi.dsi.fastutil.chars.CharIterable, java.lang.Iterable<java.lang.Character>, java.util.Collection<java.lang.Character>
Direct Known Subclasses:
CharBigLists.EmptyBigList, CharLists.EmptyList, CharSets.EmptySet
Enclosing class:
CharCollections
public abstract static class CharCollections.EmptyCollection
extends AbstractCharCollection
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​(CharCollection c)
    Adds all elements of the given type-specific collection to this collection.
    boolean addAll​(java.util.Collection<? extends java.lang.Character> c)
    void clear()  
    boolean contains​(char k)
    Returns true if this collection contains the specified element.
    boolean containsAll​(CharCollection 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​(CharConsumer action)  
    void forEach​(java.util.function.Consumer<? super java.lang.Character> action)
    Deprecated.
    int hashCode()  
    it.unimi.dsi.fastutil.ints.IntIterator intIterator()
    Returns a widened primitive iterator on the elements of this collection.
    it.unimi.dsi.fastutil.ints.IntSpliterator intSpliterator()
    Returns widened primitive spliterator on the elements of this collection.
    CharBidirectionalIterator iterator()
    Returns a type-specific iterator on the elements of this collection.
    boolean removeAll​(CharCollection c)
    Remove from this collection all elements in the given type-specific collection.
    boolean removeAll​(java.util.Collection<?> c)
    boolean removeIf​(CharPredicate filter)
    Remove from this collection all elements which satisfy the given predicate.
    boolean removeIf​(java.util.function.Predicate<? super java.lang.Character> filter)
    Deprecated.
    boolean retainAll​(CharCollection c)
    Retains in this collection only elements from the given type-specific collection.
    boolean retainAll​(java.util.Collection<?> c)
    int size()  
    it.unimi.dsi.fastutil.chars.CharSpliterator spliterator()
    Returns a type-specific spliterator on the elements of this collection.
    java.lang.Object[] toArray()  
    <T> T[] toArray​(T[] array)  
    char[] toCharArray()
    Returns a primitive type array containing the items of this collection.
    char[] toCharArray​(char[] a)
    Deprecated.

    Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractCharCollection

    add, add, contains, rem, remove, 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 it.unimi.dsi.fastutil.chars.CharCollection

    intParallelStream, intStream, parallelStream, removeIf, stream

    Methods inherited from interface it.unimi.dsi.fastutil.chars.CharIterable

    forEach

    Methods inherited from interface java.util.Collection

    isEmpty, toArray

  • Method Details

    • contains

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

    • toArray

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

    • toArray

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

    • iterator

      public CharBidirectionalIterator iterator()
      Description copied from interface: CharCollection
      Returns a type-specific iterator on the elements of this collection.
      Specified by:
      iterator in interface CharCollection
      Specified by:
      iterator in interface it.unimi.dsi.fastutil.chars.CharIterable
      Specified by:
      iterator in interface java.util.Collection<java.lang.Character>
      Specified by:
      iterator in interface java.lang.Iterable<java.lang.Character>
      Specified by:
      iterator in class AbstractCharCollection
      Returns:
      a type-specific iterator on the elements of this collection.

    • spliterator

      public it.unimi.dsi.fastutil.chars.CharSpliterator spliterator()
      Description copied from interface: CharCollection
      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.Character>
      Specified by:
      size in class java.util.AbstractCollection<java.lang.Character>

    • clear

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

    • hashCode

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

    • forEach

      @Deprecated public void forEach​(java.util.function.Consumer<? super java.lang.Character> action)
      Deprecated.

    • containsAll

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

    • addAll

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

    • removeAll

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

    • retainAll

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

    • removeIf

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

    • toCharArray

      public char[] toCharArray()
      Description copied from interface: CharCollection
      Returns a primitive type array containing the items of this collection.
      Specified by:
      toCharArray in interface CharCollection
      Overrides:
      toCharArray in class AbstractCharCollection
      Returns:
      a primitive type array containing the items of this collection.
      See Also:
      Collection.toArray()

    • toCharArray

      @Deprecated public char[] toCharArray​(char[] a)
      Deprecated.
      Description copied from class: AbstractCharCollection
      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:
      toCharArray in interface CharCollection
      Overrides:
      toCharArray in class AbstractCharCollection
      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​(CharConsumer action)

    • containsAll

      public boolean containsAll​(CharCollection c)
      Description copied from interface: CharCollection
      Checks whether this collection contains all elements from the given type-specific collection.
      Specified by:
      containsAll in interface CharCollection
      Overrides:
      containsAll in class AbstractCharCollection
      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​(CharCollection c)
      Description copied from interface: CharCollection
      Adds all elements of the given type-specific collection to this collection.
      Specified by:
      addAll in interface CharCollection
      Overrides:
      addAll in class AbstractCharCollection
      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​(CharCollection c)
      Description copied from interface: CharCollection
      Remove from this collection all elements in the given type-specific collection.
      Specified by:
      removeAll in interface CharCollection
      Overrides:
      removeAll in class AbstractCharCollection
      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​(CharCollection c)
      Description copied from interface: CharCollection
      Retains in this collection only elements from the given type-specific collection.
      Specified by:
      retainAll in interface CharCollection
      Overrides:
      retainAll in class AbstractCharCollection
      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​(CharPredicate filter)
      Description copied from interface: CharCollection
      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)

    • intIterator

      public it.unimi.dsi.fastutil.ints.IntIterator intIterator()
      Description copied from interface: CharCollection
      Returns a widened primitive iterator on the elements of this collection.

      This method is provided for the purpose of APIs that expect only the JDK's primitive iterators, of which there are only int, long, and double.

      WARNING: This is not the same as converting the source to a sequence of code points. This returned instance literally performs (int)(charValue) casts. Surrogate pairs will be left as separate elements instead of combined into a single element with the code point it represents. See Character for more discussion on code points, char values, and surrogate pairs.

      Returns:
      a widened primitive iterator on the elements of this collection.

    • intSpliterator

      public it.unimi.dsi.fastutil.ints.IntSpliterator intSpliterator()
      Description copied from interface: CharCollection
      Returns widened primitive spliterator on the elements of this collection.

      This method is provided for the purpose of APIs that expect only the JDK's primitive spliterators, of which there are only int, long, and double.

      WARNING: This is not the same as converting the source to a sequence of code points. This returned instance literally performs (int)(charValue) casts. Surrogate pairs will be left as separate elements instead of combined into a single element with the code point it represents. See Character for more discussion on code points, char values, and surrogate pairs.

      Returns:
      a widened primitive spliterator on the elements of this collection.