Class LongSets

java.lang.Object
it.unimi.dsi.fastutil.longs.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.
  • Field Summary

    Fields
    Modifier and Type Field Description
    static LongSets.EmptySet EMPTY_SET
    An empty set (immutable).
  • Method Summary

    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 Details

    • EMPTY_SET

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

    • 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.