public class DoubleOpenHashSet extends AbstractDoubleSet implements java.io.Serializable, java.lang.Cloneable, Hash
Instances of this class use a hash table to represent a set. The table is filled up to a specified load factor, and then doubled in size to accommodate new entries. If the table is emptied below one fourth of the load factor, it is halved in size; however, the table is never reduced to a size smaller than that at creation time: this approach makes it possible to create sets with a large capacity in which insertions and deletions do not cause immediately rehashing. Moreover, halving is not performed when deleting entries from an iterator, as it would interfere with the iteration process.
Note that clear()
does not modify the hash table size.
Rather, a family of trimming
methods lets you control the size of the table; this is particularly useful
if you reuse instances of this class.
Hash
,
HashCommon
,
Serialized FormHash.Strategy<K>
DEFAULT_GROWTH_FACTOR, DEFAULT_INITIAL_SIZE, DEFAULT_LOAD_FACTOR, FAST_LOAD_FACTOR, FREE, OCCUPIED, PRIMES, REMOVED, VERY_FAST_LOAD_FACTOR
Constructor and Description |
---|
DoubleOpenHashSet()
Creates a new hash set with initial expected
Hash.DEFAULT_INITIAL_SIZE elements
and Hash.DEFAULT_LOAD_FACTOR as load factor. |
DoubleOpenHashSet(java.util.Collection<? extends java.lang.Double> c)
Creates a new hash set with
Hash.DEFAULT_LOAD_FACTOR as load factor
copying a given collection. |
DoubleOpenHashSet(java.util.Collection<? extends java.lang.Double> c,
float f)
Creates a new hash set copying a given collection.
|
DoubleOpenHashSet(double[] a)
Creates a new hash set with
Hash.DEFAULT_LOAD_FACTOR as load factor
copying the elements of an array. |
DoubleOpenHashSet(double[] a,
float f)
Creates a new hash set copying the elements of an array.
|
DoubleOpenHashSet(double[] a,
int offset,
int length)
Creates a new hash set with
Hash.DEFAULT_LOAD_FACTOR as load factor and fills it with the elements of a given array. |
DoubleOpenHashSet(double[] a,
int offset,
int length,
float f)
Creates a new hash set and fills it with the elements of a given array.
|
DoubleOpenHashSet(DoubleCollection c)
Creates a new hash set with
Hash.DEFAULT_LOAD_FACTOR as load factor
copying a given type-specific collection. |
DoubleOpenHashSet(DoubleCollection c,
float f)
Creates a new hash set copying a given type-specific collection.
|
DoubleOpenHashSet(DoubleIterator i)
Creates a new hash set with
Hash.DEFAULT_LOAD_FACTOR as load factor using elements provided by a type-specific iterator. |
DoubleOpenHashSet(DoubleIterator i,
float f)
Creates a new hash set using elements provided by a type-specific iterator.
|
DoubleOpenHashSet(int expected)
Creates a new hash set with
Hash.DEFAULT_LOAD_FACTOR as load factor. |
DoubleOpenHashSet(int expected,
float f)
Creates a new hash set.
|
DoubleOpenHashSet(java.util.Iterator<?> i)
Creates a new hash set with
Hash.DEFAULT_LOAD_FACTOR as load factor using elements provided by an iterator. |
DoubleOpenHashSet(java.util.Iterator<?> i,
float f)
Creates a new hash set using elements provided by an iterator.
|
Modifier and Type | Method and Description |
---|---|
boolean |
add(double k)
Ensures that this collection contains the specified element (optional operation).
|
boolean |
addAll(java.util.Collection<? extends java.lang.Double> c) |
boolean |
addAll(DoubleCollection c)
Adds all elements of the given type-specific collection to this collection.
|
void |
clear() |
DoubleOpenHashSet |
clone()
Returns a deep copy of this set.
|
boolean |
contains(double k)
Returns
true if this collection contains the specified element. |
void |
forEach(java.util.function.DoubleConsumer action)
Performs the given action for each element of this type-specific
Iterable
until all elements have been processed or the action throws an
exception. |
int |
hashCode()
Returns a hash code for this set.
|
boolean |
isEmpty() |
DoubleIterator |
iterator()
Returns a type-specific iterator on the elements of this collection.
|
static DoubleOpenHashSet |
of()
Creates a new empty hash set.
|
static DoubleOpenHashSet |
of(double... a)
Creates a new hash set with
Hash.DEFAULT_LOAD_FACTOR as load factor
using a list of elements. |
static DoubleOpenHashSet |
of(double e)
Creates a new hash set with
Hash.DEFAULT_LOAD_FACTOR as load factor
using the given element. |
static DoubleOpenHashSet |
of(double e0,
double e1)
Creates a new hash set with
Hash.DEFAULT_LOAD_FACTOR as load factor
using the elements given. |
static DoubleOpenHashSet |
of(double e0,
double e1,
double e2)
Creates a new hash set with
Hash.DEFAULT_LOAD_FACTOR as load factor
using the elements given. |
boolean |
remove(double k)
Removes an element from this set.
|
int |
size() |
DoubleSpliterator |
spliterator()
Returns a type-specific spliterator on the elements of this set.
|
static DoubleOpenHashSet |
toSet(java.util.stream.DoubleStream stream)
Collects the result of a primitive
Stream into a new hash set. |
static DoubleOpenHashSet |
toSetWithExpectedSize(java.util.stream.DoubleStream stream,
int expectedSize)
Collects the result of a primitive
Stream into a new hash set, potentially pre-allocated to handle the given size. |
boolean |
trim()
Rehashes this set, making the table as small as possible.
|
boolean |
trim(int n)
Rehashes this set if the table is too large.
|
equals, rem
add, contains, containsAll, containsAll, forEach, remove, removeAll, removeAll, removeIf, retainAll, retainAll, toArray, toDoubleArray, toDoubleArray, toString
containsAll, doubleIterator, doubleParallelStream, doubleSpliterator, doubleStream, parallelStream, removeAll, removeIf, removeIf, removeIf, retainAll, stream, toArray, toDoubleArray, toDoubleArray
forEach, forEach
public DoubleOpenHashSet(int expected, float f)
The actual table size will be the least power of two greater than expected
/f
.
expected
- the expected number of elements in the hash set.f
- the load factor.public DoubleOpenHashSet(int expected)
Hash.DEFAULT_LOAD_FACTOR
as load factor.expected
- the expected number of elements in the hash set.public DoubleOpenHashSet()
Hash.DEFAULT_INITIAL_SIZE
elements
and Hash.DEFAULT_LOAD_FACTOR
as load factor.public DoubleOpenHashSet(java.util.Collection<? extends java.lang.Double> c, float f)
c
- a Collection
to be copied into the new hash set.f
- the load factor.public DoubleOpenHashSet(java.util.Collection<? extends java.lang.Double> c)
Hash.DEFAULT_LOAD_FACTOR
as load factor
copying a given collection.c
- a Collection
to be copied into the new hash set.public DoubleOpenHashSet(DoubleCollection c, float f)
c
- a type-specific collection to be copied into the new hash set.f
- the load factor.public DoubleOpenHashSet(DoubleCollection c)
Hash.DEFAULT_LOAD_FACTOR
as load factor
copying a given type-specific collection.c
- a type-specific collection to be copied into the new hash set.public DoubleOpenHashSet(DoubleIterator i, float f)
i
- a type-specific iterator whose elements will fill the set.f
- the load factor.public DoubleOpenHashSet(DoubleIterator i)
Hash.DEFAULT_LOAD_FACTOR
as load factor using elements provided by a type-specific iterator.i
- a type-specific iterator whose elements will fill the set.public DoubleOpenHashSet(java.util.Iterator<?> i, float f)
i
- an iterator whose elements will fill the set.f
- the load factor.public DoubleOpenHashSet(java.util.Iterator<?> i)
Hash.DEFAULT_LOAD_FACTOR
as load factor using elements provided by an iterator.i
- an iterator whose elements will fill the set.public DoubleOpenHashSet(double[] a, int offset, int length, float f)
a
- an array whose elements will be used to fill the set.offset
- the first element to use.length
- the number of elements to use.f
- the load factor.public DoubleOpenHashSet(double[] a, int offset, int length)
Hash.DEFAULT_LOAD_FACTOR
as load factor and fills it with the elements of a given array.a
- an array whose elements will be used to fill the set.offset
- the first element to use.length
- the number of elements to use.public DoubleOpenHashSet(double[] a, float f)
a
- an array to be copied into the new hash set.f
- the load factor.public DoubleOpenHashSet(double[] a)
Hash.DEFAULT_LOAD_FACTOR
as load factor
copying the elements of an array.a
- an array to be copied into the new hash set.public static DoubleOpenHashSet of()
public static DoubleOpenHashSet of(double e)
Hash.DEFAULT_LOAD_FACTOR
as load factor
using the given element.of
in interface DoubleSet
e
- the element that the returned set will contain.Hash.DEFAULT_LOAD_FACTOR
as load factor containing e
.public static DoubleOpenHashSet of(double e0, double e1)
Hash.DEFAULT_LOAD_FACTOR
as load factor
using the elements given.of
in interface DoubleSet
e0
- the first element.e1
- the second element.Hash.DEFAULT_LOAD_FACTOR
as load factor containing e0
and e1
.java.lang.IllegalArgumentException
- if there were duplicate entries.public static DoubleOpenHashSet of(double e0, double e1, double e2)
Hash.DEFAULT_LOAD_FACTOR
as load factor
using the elements given.of
in interface DoubleSet
e0
- the first element.e1
- the second element.e2
- the third element.Hash.DEFAULT_LOAD_FACTOR
as load factor containing e0
, e1
, and e2
.java.lang.IllegalArgumentException
- if there were duplicate entries.public static DoubleOpenHashSet of(double... a)
Hash.DEFAULT_LOAD_FACTOR
as load factor
using a list of elements.of
in interface DoubleSet
a
- a list of elements that will be used to initialize the new hash set.Hash.DEFAULT_LOAD_FACTOR
as load factor containing the elements of a
.java.lang.IllegalArgumentException
- if a duplicate entry was encountered.public static DoubleOpenHashSet toSet(java.util.stream.DoubleStream stream)
Stream
into a new hash set.
This method performs a terminal operation on the given Stream
Collector
is necessary because there is no
primitive Collector
equivalent in the Java API.public static DoubleOpenHashSet toSetWithExpectedSize(java.util.stream.DoubleStream stream, int expectedSize)
Stream
into a new hash set, potentially pre-allocated to handle the given size.
This method performs a terminal operation on the given Stream
Collector
is necessary because there is no
primitive Collector
equivalent in the Java API.public boolean addAll(DoubleCollection c)
DoubleCollection
addAll
in interface DoubleCollection
addAll
in class AbstractDoubleCollection
c
- a type-specific collection.true
if this collection changed as a result of the call.Collection.addAll(Collection)
public boolean addAll(java.util.Collection<? extends java.lang.Double> c)
AbstractDoubleCollection
addAll
in interface java.util.Collection<java.lang.Double>
addAll
in interface java.util.Set<java.lang.Double>
addAll
in class AbstractDoubleCollection
public boolean add(double k)
AbstractDoubleCollection
add
in interface DoubleCollection
add
in class AbstractDoubleCollection
Collection.add(Object)
public boolean remove(double k)
AbstractDoubleSet
rem()
method
implemented by type-specific abstract Collection
superclass.remove
in interface DoubleSet
remove
in class AbstractDoubleSet
Collection.remove(Object)
public boolean contains(double k)
AbstractDoubleCollection
true
if this collection contains the specified element.contains
in interface DoubleCollection
contains
in class AbstractDoubleCollection
Collection.contains(Object)
public void clear()
clear
in interface java.util.Collection<java.lang.Double>
clear
in interface java.util.Set<java.lang.Double>
clear
in class java.util.AbstractCollection<java.lang.Double>
public int size()
size
in interface java.util.Collection<java.lang.Double>
size
in interface java.util.Set<java.lang.Double>
size
in class java.util.AbstractCollection<java.lang.Double>
public boolean isEmpty()
isEmpty
in interface java.util.Collection<java.lang.Double>
isEmpty
in interface java.util.Set<java.lang.Double>
isEmpty
in class java.util.AbstractCollection<java.lang.Double>
public DoubleIterator iterator()
DoubleCollection
iterator
in interface DoubleCollection
iterator
in interface DoubleIterable
iterator
in interface DoubleSet
iterator
in interface java.lang.Iterable<java.lang.Double>
iterator
in interface java.util.Collection<java.lang.Double>
iterator
in interface java.util.Set<java.lang.Double>
iterator
in class AbstractDoubleSet
Iterable.iterator()
public DoubleSpliterator spliterator()
DoubleSet
Set spliterators must report at least Spliterator.DISTINCT
.
See Set.spliterator()
for more documentation on the requirements
of the returned spliterator.
spliterator
in interface DoubleCollection
spliterator
in interface DoubleIterable
spliterator
in interface DoubleSet
spliterator
in interface java.lang.Iterable<java.lang.Double>
spliterator
in interface java.util.Collection<java.lang.Double>
spliterator
in interface java.util.Set<java.lang.Double>
public void forEach(java.util.function.DoubleConsumer action)
DoubleIterable
Iterable
until all elements have been processed or the action throws an
exception.forEach
in interface DoubleIterable
action
- the action to be performed for each element.Iterable.forEach(java.util.function.Consumer)
public boolean trim()
This method rehashes the table to the smallest size satisfying the load factor. It can be used when the set will not be changed anymore, so to optimize access speed and size.
If the table size is already the minimum possible, this method does nothing.
trim(int)
public boolean trim(int n)
Let N be the smallest table size that can hold
max(n,
entries, still satisfying the load factor. If the current
table size is smaller than or equal to N, this method does
nothing. Otherwise, it rehashes this set in a table of size
N.
size()
)
This method is useful when reusing sets. Clearing a set leaves the table size untouched. If you are reusing a set many times, you can call this method with a typical size to avoid keeping around a very large table just because of a few large transient sets.
n
- the threshold for the trimming.trim()
public DoubleOpenHashSet clone()
This method performs a deep copy of this hash set; the data stored in the set, however, is not cloned. Note that this makes a difference only for object keys.
clone
in class java.lang.Object
public int hashCode()
equals()
is not overriden, it is important
that the value returned by this method is the same value as
the one returned by the overriden method.hashCode
in interface java.util.Collection<java.lang.Double>
hashCode
in interface java.util.Set<java.lang.Double>
hashCode
in class AbstractDoubleSet