Package it.unimi.dsi.fastutil.longs

Class LongSets

  • public final class LongSets
extends java.lang.Object
    A class providing static methods and objects that do useful things with type-specific sets.
    See Also:
    Collections

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description
      static class  LongSets.EmptySet
      An immutable class representing the empty set and implementing a type-specific set interface.
      static class  LongSets.Singleton
      An immutable class representing a type-specific singleton set.
      static class  LongSets.SynchronizedSet
      A synchronized wrapper class for sets.
      static class  LongSets.UnmodifiableSet
      An unmodifiable wrapper class for sets.

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static LongSet emptySet()
      Returns an empty set (immutable).
      static LongSet from​(long from)
      Returns an unmodifiable type-specific set containing elements greater than or equal to a given element.
      static LongSet fromTo​(long from, long to)
      Returns an unmodifiable type-specific set containing elements in the given range.
      static LongSet singleton​(long element)
      Returns a type-specific immutable set containing only the specified element.
      static LongSet singleton​(java.lang.Long element)
      Returns a type-specific immutable set containing only the specified element.
      static LongSet synchronize​(LongSet s)
      Returns a synchronized type-specific set backed by the given type-specific set.
      static LongSet synchronize​(LongSet s, java.lang.Object sync)
      Returns a synchronized type-specific set backed by the given type-specific set, using an assigned object to synchronize.
      static LongSet to​(long to)
      Returns an unmodifiable type-specific set containing elements smaller than a given element.
      static LongSet unmodifiable​(LongSet s)
      Returns an unmodifiable type-specific set backed by the given type-specific set.

      • Methods inherited from class java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • EMPTY_SET

        public static final LongSets.EmptySet EMPTY_SET
        An empty set (immutable). It is serializable and cloneable.

    • Method Detail

      • emptySet

        public static LongSet emptySet()
        Returns an empty set (immutable). It is serializable and cloneable.

        This method provides a typesafe access to EMPTY_SET.

        Returns:
        an empty set (immutable).

      • singleton

        public static LongSet singleton​(long element)
        Returns a type-specific immutable set containing only the specified element. The returned set is serializable and cloneable.
        Parameters:
        element - the only element of the returned set.
        Returns:
        a type-specific immutable set containing just element.

      • singleton

        public static LongSet singleton​(java.lang.Long element)
        Returns a type-specific immutable set containing only the specified element. The returned set is serializable and cloneable.
        Parameters:
        element - the only element of the returned set.
        Returns:
        a type-specific immutable set containing just element.

      • synchronize

        public static LongSet synchronize​(LongSet s)
        Returns a synchronized type-specific set backed by the given type-specific set.
        Parameters:
        s - the set to be wrapped in a synchronized set.
        Returns:
        a synchronized view of the specified set.
        See Also:
        Collections.synchronizedSet(Set)

      • synchronize

        public static LongSet synchronize​(LongSet s,
                                  java.lang.Object sync)
        Returns a synchronized type-specific set backed by the given type-specific set, using an assigned object to synchronize.
        Parameters:
        s - the set to be wrapped in a synchronized set.
        sync - an object that will be used to synchronize the access to the set.
        Returns:
        a synchronized view of the specified set.
        See Also:
        Collections.synchronizedSet(Set)

      • unmodifiable

        public static LongSet unmodifiable​(LongSet s)
        Returns an unmodifiable type-specific set backed by the given type-specific set.
        Parameters:
        s - the set to be wrapped in an unmodifiable set.
        Returns:
        an unmodifiable view of the specified set.
        See Also:
        Collections.unmodifiableSet(Set)

      • fromTo

        public static LongSet fromTo​(long from,
                             long to)
        Returns an unmodifiable type-specific set containing elements in the given range.
        Parameters:
        from - the starting element (lower bound) of the set (inclusive).
        to - the ending element (upper bound) of the set (exclusive).
        Returns:
        an unmodifiable set containing the elements in the given range.

      • from

        public static LongSet from​(long from)
        Returns an unmodifiable type-specific set containing elements greater than or equal to a given element.
        Parameters:
        from - the starting element (lower bound) of the set (inclusive).
        Returns:
        an unmodifiable set containing the elements greater than or equal to from.

      • to

        public static LongSet to​(long to)
        Returns an unmodifiable type-specific set containing elements smaller than a given element.
        Parameters:
        to - the ending element (upper bound) of the set (exclusive).
        Returns:
        an unmodifiable set containing the elements smaller than to.