Package it.unimi.dsi.fastutil.doubles
Class DoubleSets
- java.lang.Object
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- it.unimi.dsi.fastutil.doubles.DoubleSets
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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
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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.
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Field Summary
Fields Modifier and Type Field Description static DoubleSets.EmptySet
EMPTY_SET
An empty set (immutable).
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static DoubleSet
emptySet()
Returns an empty set (immutable).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.
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Field Detail
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EMPTY_SET
public static final DoubleSets.EmptySet EMPTY_SET
An empty set (immutable). It is serializable and cloneable.
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Method Detail
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emptySet
public static DoubleSet 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).
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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
.
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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
.
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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)
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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)
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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)
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