public class DoubleOpenHashBigSet extends AbstractDoubleSet implements java.io.Serializable, java.lang.Cloneable, Hash, Size64
Instances of this class use a hash table to represent a big set: the number of elements in the set is limited only by the amount of core memory. The table (backed by a big array) 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.
The methods of this class are about 30% slower than those of the corresponding non-big set.
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 |
|---|
DoubleOpenHashBigSet()
Creates a new hash big set with initial expected
Hash.DEFAULT_INITIAL_SIZE elements and
Hash.DEFAULT_LOAD_FACTOR as load factor. |
DoubleOpenHashBigSet(java.util.Collection<? extends java.lang.Double> c)
Creates a new hash big set with
Hash.DEFAULT_LOAD_FACTOR as load
factor copying a given collection. |
DoubleOpenHashBigSet(java.util.Collection<? extends java.lang.Double> c,
float f)
Creates a new hash big set copying a given collection.
|
DoubleOpenHashBigSet(double[] a)
Creates a new hash big set with
Hash.DEFAULT_LOAD_FACTOR as load
factor copying the elements of an array. |
DoubleOpenHashBigSet(double[] a,
float f)
Creates a new hash big set copying the elements of an array.
|
DoubleOpenHashBigSet(double[] a,
int offset,
int length)
Creates a new hash big set with
Hash.DEFAULT_LOAD_FACTOR as load
factor and fills it with the elements of a given array. |
DoubleOpenHashBigSet(double[] a,
int offset,
int length,
float f)
Creates a new hash big set and fills it with the elements of a given array.
|
DoubleOpenHashBigSet(DoubleCollection c)
Creates a new hash big set with
Hash.DEFAULT_LOAD_FACTOR as load
factor copying a given type-specific collection. |
DoubleOpenHashBigSet(DoubleCollection c,
float f)
Creates a new hash big set copying a given type-specific collection.
|
DoubleOpenHashBigSet(DoubleIterator i)
Creates a new hash big set with
Hash.DEFAULT_LOAD_FACTOR as load
factor using elements provided by a type-specific iterator. |
DoubleOpenHashBigSet(DoubleIterator i,
float f)
Creates a new hash big set using elements provided by a type-specific
iterator.
|
DoubleOpenHashBigSet(java.util.Iterator<?> i)
Creates a new hash big set with
Hash.DEFAULT_LOAD_FACTOR as load
factor using elements provided by an iterator. |
DoubleOpenHashBigSet(java.util.Iterator<?> i,
float f)
Creates a new hash big set using elements provided by an iterator.
|
DoubleOpenHashBigSet(long expected)
Creates a new hash big set with
Hash.DEFAULT_LOAD_FACTOR as load
factor. |
DoubleOpenHashBigSet(long expected,
float f)
Creates a new hash big set.
|
| 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()
To increase object reuse, this method does not change the table size.
|
DoubleOpenHashBigSet |
clone()
Returns a deep copy of this big set.
|
boolean |
contains(double k)
Returns
true if this collection contains the specified element. |
int |
hashCode()
Returns a hash code for this set.
|
boolean |
isEmpty() |
DoubleIterator |
iterator()
Returns a type-specific iterator on the elements of this collection.
|
boolean |
remove(double k)
Removes an element from this set.
|
int |
size()
Deprecated.
|
long |
size64()
Returns the size of this data structure as a long.
|
boolean |
trim()
Rehashes this set, making the table as small as possible.
|
boolean |
trim(long n)
Rehashes this set if the table is too large.
|
equals, remadd, contains, containsAll, remove, removeAll, retainAll, toArray, toDoubleArray, toDoubleArray, toStringcontainsAll, removeAll, retainAll, toArray, toArraycontainsAll, removeAll, removeIf, removeIf, retainAll, toArray, toDoubleArray, toDoubleArrayforEach, forEachpublic DoubleOpenHashBigSet(long 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 set.f - the load factor.public DoubleOpenHashBigSet(long expected)
Hash.DEFAULT_LOAD_FACTOR as load
factor.expected - the expected number of elements in the hash big set.public DoubleOpenHashBigSet()
Hash.DEFAULT_INITIAL_SIZE elements and
Hash.DEFAULT_LOAD_FACTOR as load factor.public DoubleOpenHashBigSet(java.util.Collection<? extends java.lang.Double> c,
float f)
c - a Collection to be copied into the new hash big set.f - the load factor.public DoubleOpenHashBigSet(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 big set.public DoubleOpenHashBigSet(DoubleCollection c, float f)
c - a type-specific collection to be copied into the new hash big set.f - the load factor.public DoubleOpenHashBigSet(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 big set.public DoubleOpenHashBigSet(DoubleIterator i, float f)
i - a type-specific iterator whose elements will fill the new hash big
set.f - the load factor.public DoubleOpenHashBigSet(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 new hash big
set.public DoubleOpenHashBigSet(java.util.Iterator<?> i,
float f)
i - an iterator whose elements will fill the new hash big set.f - the load factor.public DoubleOpenHashBigSet(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 new hash big set.public DoubleOpenHashBigSet(double[] a,
int offset,
int length,
float f)
a - an array whose elements will be used to fill the new hash big set.offset - the first element to use.length - the number of elements to use.f - the load factor.public DoubleOpenHashBigSet(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 new hash big set.offset - the first element to use.length - the number of elements to use.public DoubleOpenHashBigSet(double[] a,
float f)
a - an array to be copied into the new hash big set.f - the load factor.public DoubleOpenHashBigSet(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 big set.public boolean addAll(java.util.Collection<? extends java.lang.Double> c)
addAll in interface java.util.Collection<java.lang.Double>addAll in interface java.util.Set<java.lang.Double>addAll in class java.util.AbstractCollection<java.lang.Double>public boolean addAll(DoubleCollection c)
DoubleCollectionaddAll in interface DoubleCollectionaddAll in class AbstractDoubleCollectionc - a type-specific collection.true if this collection changed as a result of the call.Collection.addAll(Collection)public boolean add(double k)
AbstractDoubleCollection
This implementation always throws an UnsupportedOperationException.
add in interface DoubleCollectionadd in class AbstractDoubleCollectionCollection.add(Object)public boolean remove(double k)
AbstractDoubleSet
Note that the corresponding method of a type-specific collection is
rem(). This unfortunate situation is caused by the clash with the
similarly named index-based method in the List interface. Delegates to the type-specific rem() method implemented
by type-specific abstract Collection superclass.
remove in interface DoubleSetremove in class AbstractDoubleSetCollection.remove(Object)public boolean contains(double k)
AbstractDoubleCollectiontrue if this collection contains the specified element.
This implementation iterates over the elements in the collection, looking for the specified element.
contains in interface DoubleCollectioncontains in class AbstractDoubleCollectionCollection.contains(Object)public void clear()
To increase object reuse, this method does not change the table size. If you
want to reduce the table size, you must use trim(long).
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 DoubleIterator iterator()
DoubleCollection
Note that this specification strengthens the one given in
Iterable.iterator(), which was already strengthened in the
corresponding type-specific class, but was weakened by the fact that this
interface extends Collection.
iterator in interface DoubleCollectioniterator in interface DoubleIterableiterator in interface DoubleSetiterator 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 AbstractDoubleSetIterable.iterator()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(long)public boolean trim(long 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.
size64())
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()@Deprecated public int size()
Size64Integer.MAX_VALUE.
This default implementation follows the definition above, which is compatible
with Collection.size().
size in interface Size64size 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>Integer.MAX_VALUE.Collection.size()public long size64()
Size64public 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 DoubleOpenHashBigSet clone()
This method performs a deep copy of this big 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.Objectpublic 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