Class CharSets.EmptySet

  • All Implemented Interfaces:
    CharCollection, CharIterable, CharSet, java.io.Serializable, java.lang.Cloneable, java.lang.Iterable<java.lang.Character>, java.util.Collection<java.lang.Character>, java.util.Set<java.lang.Character>
    Direct Known Subclasses:
    CharSortedSets.EmptySet
    Enclosing class:
    CharSets

    public static class CharSets.EmptySet
    extends CharCollections.EmptyCollection
    implements CharSet, java.io.Serializable, java.lang.Cloneable
    An immutable class representing the empty set and implementing a type-specific set interface.

    This class may be useful to implement your own in case you subclass a type-specific set.

    See Also:
    Serialized Form
    • Method Detail

      • remove

        public boolean remove​(char ok)
        Description copied from interface: CharSet
        Removes an element from this set.

        Note that the corresponding method of a type-specific collection is rem(). This unfortunate situation is caused by the clash with the similarly named index-based method in the List interface.

        Specified by:
        remove in interface CharSet
        See Also:
        Collection.remove(Object)
      • clone

        public java.lang.Object clone()
      • equals

        public boolean equals​(java.lang.Object o)
        Specified by:
        equals in interface java.util.Collection<java.lang.Character>
        Specified by:
        equals in interface java.util.Set<java.lang.Character>
        Overrides:
        equals in class CharCollections.EmptyCollection
      • rem

        @Deprecated
        public boolean rem​(char k)
        Deprecated.
        Description copied from class: AbstractCharCollection
        Removes a single instance of the specified element from this collection, if it is present (optional operation).

        Note that this method should be called remove(), but the clash with the similarly named index-based method in the List interface forces us to use a distinguished name. For simplicity, the set interfaces reinstates remove().

        This implementation iterates over the elements in the collection, looking for the specified element and tries to remove it.

        Specified by:
        rem in interface CharCollection
        Specified by:
        rem in interface CharSet
        Overrides:
        rem in class AbstractCharCollection
        See Also:
        Collection.remove(Object)