Class DoubleSets


  • public final class DoubleSets
    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  DoubleSets.EmptySet
      An immutable class representing the empty set and implementing a type-specific set interface.
      static class  DoubleSets.Singleton
      An immutable class representing a type-specific singleton set.
      static class  DoubleSets.SynchronizedSet
      A synchronized wrapper class for sets.
      static class  DoubleSets.UnmodifiableSet
      An unmodifiable wrapper class for sets.
    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static DoubleSet singleton​(double element)
      Returns a type-specific immutable set containing only the specified element.
      static DoubleSet singleton​(java.lang.Double element)
      Returns a type-specific immutable set containing only the specified element.
      static DoubleSet synchronize​(DoubleSet s)
      Returns a synchronized type-specific set backed by the given type-specific set.
      static DoubleSet synchronize​(DoubleSet 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 DoubleSet unmodifiable​(DoubleSet 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 DoubleSets.EmptySet EMPTY_SET
        An empty set (immutable). It is serializable and cloneable.
    • Method Detail

      • singleton

        public static DoubleSet singleton​(double 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 DoubleSet singleton​(java.lang.Double 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 DoubleSet synchronize​(DoubleSet 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 DoubleSet synchronize​(DoubleSet 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 DoubleSet unmodifiable​(DoubleSet 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)