K - the type of keys maintained by this mapV - the type of mapped valuespublic class ConcurrentHashMapV8<K,V> extends Object implements ConcurrentMap<K,V>, Serializable
Hashtable, and includes versions of methods
corresponding to each method of Hashtable. However, even though all
operations are thread-safe, retrieval operations do not entail
locking, and there is not any support for locking the entire table
in a way that prevents all access. This class is fully interoperable with
Hashtable in programs that rely on its thread safety but not on its
synchronization details.
Retrieval operations (including get) generally do not block, so
may overlap with update operations (including put and
remove). Retrievals reflect the results of the most recently
completed update operations holding upon their onset. (More
formally, an update operation for a given key bears a
happens-before relation with any (non-null) retrieval for that key
reporting the updated value.) For aggregate operations such as putAll
and clear, concurrent retrievals may reflect insertion or removal of
only some entries. Similarly, Iterators and Enumerations return elements
reflecting the state of the hash table at some point at or since the creation
of the iterator/enumeration. They do not throw ConcurrentModificationException. However, iterators are designed to be used
by only one thread at a time. Bear in mind that the results of aggregate
status methods including size, isEmpty, and containsValue are typically useful only when a map is
not undergoing concurrent updates in other threads. Otherwise the results of
these methods reflect transient states that may be adequate for monitoring or
estimation purposes, but not for program control.
The table is dynamically expanded when there are too many collisions
(i.e., keys that have distinct hash codes but fall into the same slot modulo
the table size), with the expected average effect of maintaining roughly two
bins per mapping (corresponding to a 0.75 load factor threshold for
resizing). There may be much variance around this average as mappings are
added and removed, but overall, this maintains a commonly accepted time/space
tradeoff for hash tables. However, resizing this or any other kind of hash
table may be a relatively slow operation. When possible, it is a good idea to
provide a size estimate as an optional initialCapacity constructor argument. An additional optional
loadFactor constructor argument provides a further means of
customizing initial table capacity by specifying the table density to be used
in calculating the amount of space to allocate for the given number of
elements. Also, for compatibility with previous versions of this class,
constructors may optionally specify an expected concurrencyLevel as
an additional hint for internal sizing. Note that using many keys with
exactly the same hashCode() is a sure way to slow down performance of
any hash table.
A Set projection of a ConcurrentHashMapV8 may be created (using
newKeySet() or newKeySet(int)), or viewed (using
keySet(Object) when only keys are of interest, and the mapped values
are (perhaps transiently) not used or all take the same mapping value.
A ConcurrentHashMapV8 can be used as scalable frequency map (a form of
histogram or multiset) by using LongAdder values and initializing via
computeIfAbsent(K, org.skfiy.util.v8.ConcurrentHashMapV8.Fun<? super K, ? extends V>). For example, to add a count to a
ConcurrentHashMapV8<String,LongAdder> freqs, you can use freqs.computeIfAbsent(k -> new
LongAdder()).increment();
This class and its views and iterators implement all of the
optional methods of the Map and Iterator interfaces.
Like Hashtable but unlike HashMap, this class does
not allow null to be used as a key or value.
ConcurrentHashMapV8s support sequential and parallel operations bulk
operations. (Parallel forms use the ForkJoinPool.commonPool()). Tasks that may be used in other contexts are
available in class ConcurrentHashMapV8.ForkJoinTasks. These operations are designed to be
safely, and often sensibly, applied even with maps that are being
concurrently updated by other threads; for example, when computing a snapshot
summary of the values in a shared registry. There are three kinds of
operation, each with four forms, accepting functions with Keys, Values,
Entries, and (Key, Value) arguments and/or return values. Because the
elements of a ConcurrentHashMapV8 are not ordered in any particular way, and
may be processed in different orders in different parallel executions, the
correctness of supplied functions should not depend on any ordering, or on
any other objects or values that may transiently change while computation is
in progress; and except for forEach actions, should ideally be
side-effect-free.
The concurrency properties of bulk operations follow from those of
ConcurrentHashMapV8: Any non-null result returned from get(key) and
related access methods bears a happens-before relation with the associated
insertion or update. The result of any bulk operation reflects the
composition of these per-element relations (but is not necessarily atomic
with respect to the map as a whole unless it is somehow known to be
quiescent). Conversely, because keys and values in the map are never null,
null serves as a reliable atomic indicator of the current lack of any result.
To maintain this property, null serves as an implicit basis for all
non-scalar reduction operations. For the double, long, and int versions, the
basis should be one that, when combined with any other value, returns that
other value (more formally, it should be the identity element for the
reduction). Most common reductions have these properties; for example,
computing a sum with basis 0 or a minimum with basis MAX_VALUE.
Search and transformation functions provided as arguments should similarly return null to indicate the lack of any result (in which case it is not used). In the case of mapped reductions, this also enables transformations to serve as filters, returning null (or, in the case of primitive specializations, the identity basis) if the element should not be combined. You can create compound transformations and filterings by composing them yourself under this "null means there is nothing there now" rule before using them in search or reduce operations.
Methods accepting and/or returning Entry arguments maintain key-value
associations. They may be useful for example when finding the key for the
greatest value. Note that "plain" Entry arguments can be supplied using new
AbstractMap.SimpleEntry(k,v).
Bulk operations may complete abruptly, throwing an exception encountered in the application of a supplied function. Bear in mind when handling such exceptions that other concurrently executing functions could also have thrown exceptions, or would have done so if the first exception had not occurred.
Speedups for parallel compared to sequential forms are common but not guaranteed. Parallel operations involving brief functions on small maps may execute more slowly than sequential forms if the underlying work to parallelize the computation is more expensive than the computation itself. Similarly, parallelization may not lead to much actual parallelism if all processors are busy performing unrelated tasks.
All arguments to all task methods must be non-null.
jsr166e note: During transition, this class uses nested functional interfaces with different names but the same forms as those expected for JDK8.
This class is a member of the Java Collections Framework.
| 限定符和类型 | 类和说明 |
|---|---|
static interface |
ConcurrentHashMapV8.Action<A>
Interface describing a void action of one argument
|
static interface |
ConcurrentHashMapV8.BiAction<A,B>
Interface describing a void action of two arguments
|
static interface |
ConcurrentHashMapV8.BiFun<A,B,T>
Interface describing a function of two arguments
|
static interface |
ConcurrentHashMapV8.DoubleByDoubleToDouble
Interface describing a function mapping two doubles to a double
|
static interface |
ConcurrentHashMapV8.DoubleToDouble
Interface describing a function mapping a double to a double
|
static class |
ConcurrentHashMapV8.EntrySetView<K,V>
A view of a ConcurrentHashMapV8 as a
Set of (key, value) entries. |
static class |
ConcurrentHashMapV8.ForkJoinTasks
Predefined tasks for performing bulk parallel operations on
ConcurrentHashMapV8s.
|
static interface |
ConcurrentHashMapV8.Fun<A,T>
Interface describing a function of one argument
|
static interface |
ConcurrentHashMapV8.Generator<T>
Interface describing a function of no arguments
|
static interface |
ConcurrentHashMapV8.IntByIntToInt
Interface describing a function mapping two ints to an int
|
static interface |
ConcurrentHashMapV8.IntToInt
Interface describing a function mapping an int to an int
|
static class |
ConcurrentHashMapV8.KeySetView<K,V>
A view of a ConcurrentHashMapV8 as a
Set of keys, in which
additions may optionally be enabled by mapping to a common value. |
static interface |
ConcurrentHashMapV8.LongByLongToLong
Interface describing a function mapping two longs to a long
|
static interface |
ConcurrentHashMapV8.LongToLong
Interface describing a function mapping a long to a long
|
static interface |
ConcurrentHashMapV8.ObjectByObjectToDouble<A,B>
Interface describing a function mapping two arguments to a double
|
static interface |
ConcurrentHashMapV8.ObjectByObjectToInt<A,B>
Interface describing a function mapping two arguments to an int
|
static interface |
ConcurrentHashMapV8.ObjectByObjectToLong<A,B>
Interface describing a function mapping two arguments to a long
|
static interface |
ConcurrentHashMapV8.ObjectToDouble<A>
Interface describing a function mapping its argument to a double
|
static interface |
ConcurrentHashMapV8.ObjectToInt<A>
Interface describing a function mapping its argument to an int
|
static interface |
ConcurrentHashMapV8.ObjectToLong<A>
Interface describing a function mapping its argument to a long
|
static interface |
ConcurrentHashMapV8.Spliterator<T>
A partitionable iterator.
|
static class |
ConcurrentHashMapV8.ValuesView<K,V>
A view of a ConcurrentHashMapV8 as a
Collection of values, in
which additions are disabled. |
| 构造器和说明 |
|---|
ConcurrentHashMapV8()
Creates a new, empty map with the default initial table size (16).
|
ConcurrentHashMapV8(int initialCapacity)
Creates a new, empty map with an initial table size accommodating the
specified number of elements without the need to dynamically resize.
|
ConcurrentHashMapV8(int initialCapacity,
float loadFactor)
Creates a new, empty map with an initial table size based on the given
number of elements (
initialCapacity) and initial table density
(loadFactor). |
ConcurrentHashMapV8(int initialCapacity,
float loadFactor,
int concurrencyLevel)
Creates a new, empty map with an initial table size based on the given
number of elements (
initialCapacity), table density
(loadFactor), and number of concurrently updating threads
(concurrencyLevel). |
ConcurrentHashMapV8(Map<? extends K,? extends V> m)
Creates a new map with the same mappings as the given map.
|
| 限定符和类型 | 方法和说明 |
|---|---|
void |
clear()
Removes all of the mappings from this map.
|
V |
compute(K key,
ConcurrentHashMapV8.BiFun<? super K,? super V,? extends V> remappingFunction)
Computes a new mapping value given a key and its current mapped value (or
null if there is no current mapping). |
V |
computeIfAbsent(K key,
ConcurrentHashMapV8.Fun<? super K,? extends V> mappingFunction)
If the specified key is not already associated with a value, computes its
value using the given mappingFunction and enters it into the map unless
null.
|
V |
computeIfPresent(K key,
ConcurrentHashMapV8.BiFun<? super K,? super V,? extends V> remappingFunction)
If the given key is present, computes a new mapping value given a key and
its current mapped value.
|
boolean |
contains(Object value)
已过时。
|
boolean |
containsKey(Object key)
Tests if the specified object is a key in this table.
|
boolean |
containsValue(Object value)
Returns
true if this map maps one or more keys to the specified
value. |
Enumeration<V> |
elements()
Returns an enumeration of the values in this table.
|
Set<Map.Entry<K,V>> |
entrySet()
Returns a
Set view of the mappings contained in this map. |
ConcurrentHashMapV8.Spliterator<Map.Entry<K,V>> |
entrySpliterator()
Returns a partitionable iterator of the entries in this map.
|
boolean |
equals(Object o)
Compares the specified object with this map for equality.
|
void |
forEachEntryInParallel(ConcurrentHashMapV8.Action<Map.Entry<K,V>> action)
Performs the given action for each entry.
|
<U> void |
forEachEntryInParallel(ConcurrentHashMapV8.Fun<Map.Entry<K,V>,? extends U> transformer,
ConcurrentHashMapV8.Action<U> action)
Performs the given action for each non-null transformation of each entry.
|
void |
forEachEntrySequentially(ConcurrentHashMapV8.Action<Map.Entry<K,V>> action)
Performs the given action for each entry.
|
<U> void |
forEachEntrySequentially(ConcurrentHashMapV8.Fun<Map.Entry<K,V>,? extends U> transformer,
ConcurrentHashMapV8.Action<U> action)
Performs the given action for each non-null transformation of each entry.
|
void |
forEachInParallel(ConcurrentHashMapV8.BiAction<K,V> action)
Performs the given action for each (key, value).
|
<U> void |
forEachInParallel(ConcurrentHashMapV8.BiFun<? super K,? super V,? extends U> transformer,
ConcurrentHashMapV8.Action<U> action)
Performs the given action for each non-null transformation of each (key,
value).
|
void |
forEachKeyInParallel(ConcurrentHashMapV8.Action<K> action)
Performs the given action for each key.
|
<U> void |
forEachKeyInParallel(ConcurrentHashMapV8.Fun<? super K,? extends U> transformer,
ConcurrentHashMapV8.Action<U> action)
Performs the given action for each non-null transformation of each key.
|
void |
forEachKeySequentially(ConcurrentHashMapV8.Action<K> action)
Performs the given action for each key.
|
<U> void |
forEachKeySequentially(ConcurrentHashMapV8.Fun<? super K,? extends U> transformer,
ConcurrentHashMapV8.Action<U> action)
Performs the given action for each non-null transformation of each key.
|
void |
forEachSequentially(ConcurrentHashMapV8.BiAction<K,V> action)
Performs the given action for each (key, value).
|
<U> void |
forEachSequentially(ConcurrentHashMapV8.BiFun<? super K,? super V,? extends U> transformer,
ConcurrentHashMapV8.Action<U> action)
Performs the given action for each non-null transformation of each (key,
value).
|
void |
forEachValueInParallel(ConcurrentHashMapV8.Action<V> action)
Performs the given action for each value.
|
<U> void |
forEachValueInParallel(ConcurrentHashMapV8.Fun<? super V,? extends U> transformer,
ConcurrentHashMapV8.Action<U> action)
Performs the given action for each non-null transformation of each value.
|
void |
forEachValueSequentially(ConcurrentHashMapV8.Action<V> action)
Performs the given action for each value.
|
<U> void |
forEachValueSequentially(ConcurrentHashMapV8.Fun<? super V,? extends U> transformer,
ConcurrentHashMapV8.Action<U> action)
Performs the given action for each non-null transformation of each value.
|
V |
get(Object key)
Returns the value to which the specified key is mapped, or
null
if this map contains no mapping for the key. |
V |
getValueOrDefault(Object key,
V defaultValue)
Returns the value to which the specified key is mapped, or the given
defaultValue if this map contains no mapping for the key.
|
int |
hashCode()
Returns the hash code value for this
Map, i.e., the sum of, for
each key-value pair in the map,
key.hashCode() ^ value.hashCode(). |
boolean |
isEmpty() |
Enumeration<K> |
keys()
Returns an enumeration of the keys in this table.
|
ConcurrentHashMapV8.KeySetView<K,V> |
keySet()
Returns a
Set view of the keys contained in this map. |
ConcurrentHashMapV8.KeySetView<K,V> |
keySet(V mappedValue)
Returns a
Set view of the keys in this map, using the given
common mapped value for any additions (i.e., Collection.add(E) and Collection.addAll(java.util.Collection<? extends E>)). |
ConcurrentHashMapV8.Spliterator<K> |
keySpliterator()
Returns a partitionable iterator of the keys in this map.
|
long |
mappingCount()
Returns the number of mappings.
|
V |
merge(K key,
V value,
ConcurrentHashMapV8.BiFun<? super V,? super V,? extends V> remappingFunction)
If the specified key is not already associated with a value, associate it
with the given value.
|
static <K> ConcurrentHashMapV8.KeySetView<K,Boolean> |
newKeySet()
Creates a new
Set backed by a ConcurrentHashMapV8 from the given
type to Boolean.TRUE. |
static <K> ConcurrentHashMapV8.KeySetView<K,Boolean> |
newKeySet(int initialCapacity)
Creates a new
Set backed by a ConcurrentHashMapV8 from the given
type to Boolean.TRUE. |
V |
put(K key,
V value)
Maps the specified key to the specified value in this table.
|
void |
putAll(Map<? extends K,? extends V> m)
Copies all of the mappings from the specified map to this one.
|
V |
putIfAbsent(K key,
V value) |
Map.Entry<K,V> |
reduceEntriesInParallel(ConcurrentHashMapV8.BiFun<Map.Entry<K,V>,Map.Entry<K,V>,? extends Map.Entry<K,V>> reducer)
Returns the result of accumulating all entries using the given reducer to
combine values, or null if none.
|
<U> U |
reduceEntriesInParallel(ConcurrentHashMapV8.Fun<Map.Entry<K,V>,? extends U> transformer,
ConcurrentHashMapV8.BiFun<? super U,? super U,? extends U> reducer)
Returns the result of accumulating the given transformation of all
entries using the given reducer to combine values, or null if none.
|
Map.Entry<K,V> |
reduceEntriesSequentially(ConcurrentHashMapV8.BiFun<Map.Entry<K,V>,Map.Entry<K,V>,? extends Map.Entry<K,V>> reducer)
Returns the result of accumulating all entries using the given reducer to
combine values, or null if none.
|
<U> U |
reduceEntriesSequentially(ConcurrentHashMapV8.Fun<Map.Entry<K,V>,? extends U> transformer,
ConcurrentHashMapV8.BiFun<? super U,? super U,? extends U> reducer)
Returns the result of accumulating the given transformation of all
entries using the given reducer to combine values, or null if none.
|
double |
reduceEntriesToDoubleInParallel(ConcurrentHashMapV8.ObjectToDouble<Map.Entry<K,V>> transformer,
double basis,
ConcurrentHashMapV8.DoubleByDoubleToDouble reducer)
Returns the result of accumulating the given transformation of all
entries using the given reducer to combine values, and the given basis as
an identity value.
|
double |
reduceEntriesToDoubleSequentially(ConcurrentHashMapV8.ObjectToDouble<Map.Entry<K,V>> transformer,
double basis,
ConcurrentHashMapV8.DoubleByDoubleToDouble reducer)
Returns the result of accumulating the given transformation of all
entries using the given reducer to combine values, and the given basis as
an identity value.
|
int |
reduceEntriesToIntInParallel(ConcurrentHashMapV8.ObjectToInt<Map.Entry<K,V>> transformer,
int basis,
ConcurrentHashMapV8.IntByIntToInt reducer)
Returns the result of accumulating the given transformation of all
entries using the given reducer to combine values, and the given basis as
an identity value.
|
int |
reduceEntriesToIntSequentially(ConcurrentHashMapV8.ObjectToInt<Map.Entry<K,V>> transformer,
int basis,
ConcurrentHashMapV8.IntByIntToInt reducer)
Returns the result of accumulating the given transformation of all
entries using the given reducer to combine values, and the given basis as
an identity value.
|
long |
reduceEntriesToLongInParallel(ConcurrentHashMapV8.ObjectToLong<Map.Entry<K,V>> transformer,
long basis,
ConcurrentHashMapV8.LongByLongToLong reducer)
Returns the result of accumulating the given transformation of all
entries using the given reducer to combine values, and the given basis as
an identity value.
|
long |
reduceEntriesToLongSequentially(ConcurrentHashMapV8.ObjectToLong<Map.Entry<K,V>> transformer,
long basis,
ConcurrentHashMapV8.LongByLongToLong reducer)
Returns the result of accumulating the given transformation of all
entries using the given reducer to combine values, and the given basis as
an identity value.
|
<U> U |
reduceInParallel(ConcurrentHashMapV8.BiFun<? super K,? super V,? extends U> transformer,
ConcurrentHashMapV8.BiFun<? super U,? super U,? extends U> reducer)
Returns the result of accumulating the given transformation of all (key,
value) pairs using the given reducer to combine values, or null if none.
|
K |
reduceKeysInParallel(ConcurrentHashMapV8.BiFun<? super K,? super K,? extends K> reducer)
Returns the result of accumulating all keys using the given reducer to
combine values, or null if none.
|
<U> U |
reduceKeysInParallel(ConcurrentHashMapV8.Fun<? super K,? extends U> transformer,
ConcurrentHashMapV8.BiFun<? super U,? super U,? extends U> reducer)
Returns the result of accumulating the given transformation of all keys
using the given reducer to combine values, or null if none.
|
K |
reduceKeysSequentially(ConcurrentHashMapV8.BiFun<? super K,? super K,? extends K> reducer)
Returns the result of accumulating all keys using the given reducer to
combine values, or null if none.
|
<U> U |
reduceKeysSequentially(ConcurrentHashMapV8.Fun<? super K,? extends U> transformer,
ConcurrentHashMapV8.BiFun<? super U,? super U,? extends U> reducer)
Returns the result of accumulating the given transformation of all keys
using the given reducer to combine values, or null if none.
|
double |
reduceKeysToDoubleInParallel(ConcurrentHashMapV8.ObjectToDouble<? super K> transformer,
double basis,
ConcurrentHashMapV8.DoubleByDoubleToDouble reducer)
Returns the result of accumulating the given transformation of all keys
using the given reducer to combine values, and the given basis as an
identity value.
|
double |
reduceKeysToDoubleSequentially(ConcurrentHashMapV8.ObjectToDouble<? super K> transformer,
double basis,
ConcurrentHashMapV8.DoubleByDoubleToDouble reducer)
Returns the result of accumulating the given transformation of all keys
using the given reducer to combine values, and the given basis as an
identity value.
|
int |
reduceKeysToIntInParallel(ConcurrentHashMapV8.ObjectToInt<? super K> transformer,
int basis,
ConcurrentHashMapV8.IntByIntToInt reducer)
Returns the result of accumulating the given transformation of all keys
using the given reducer to combine values, and the given basis as an
identity value.
|
int |
reduceKeysToIntSequentially(ConcurrentHashMapV8.ObjectToInt<? super K> transformer,
int basis,
ConcurrentHashMapV8.IntByIntToInt reducer)
Returns the result of accumulating the given transformation of all keys
using the given reducer to combine values, and the given basis as an
identity value.
|
long |
reduceKeysToLongInParallel(ConcurrentHashMapV8.ObjectToLong<? super K> transformer,
long basis,
ConcurrentHashMapV8.LongByLongToLong reducer)
Returns the result of accumulating the given transformation of all keys
using the given reducer to combine values, and the given basis as an
identity value.
|
long |
reduceKeysToLongSequentially(ConcurrentHashMapV8.ObjectToLong<? super K> transformer,
long basis,
ConcurrentHashMapV8.LongByLongToLong reducer)
Returns the result of accumulating the given transformation of all keys
using the given reducer to combine values, and the given basis as an
identity value.
|
<U> U |
reduceSequentially(ConcurrentHashMapV8.BiFun<? super K,? super V,? extends U> transformer,
ConcurrentHashMapV8.BiFun<? super U,? super U,? extends U> reducer)
Returns the result of accumulating the given transformation of all (key,
value) pairs using the given reducer to combine values, or null if none.
|
double |
reduceToDoubleInParallel(ConcurrentHashMapV8.ObjectByObjectToDouble<? super K,? super V> transformer,
double basis,
ConcurrentHashMapV8.DoubleByDoubleToDouble reducer)
Returns the result of accumulating the given transformation of all (key,
value) pairs using the given reducer to combine values, and the given
basis as an identity value.
|
double |
reduceToDoubleSequentially(ConcurrentHashMapV8.ObjectByObjectToDouble<? super K,? super V> transformer,
double basis,
ConcurrentHashMapV8.DoubleByDoubleToDouble reducer)
Returns the result of accumulating the given transformation of all (key,
value) pairs using the given reducer to combine values, and the given
basis as an identity value.
|
int |
reduceToIntInParallel(ConcurrentHashMapV8.ObjectByObjectToInt<? super K,? super V> transformer,
int basis,
ConcurrentHashMapV8.IntByIntToInt reducer)
Returns the result of accumulating the given transformation of all (key,
value) pairs using the given reducer to combine values, and the given
basis as an identity value.
|
int |
reduceToIntSequentially(ConcurrentHashMapV8.ObjectByObjectToInt<? super K,? super V> transformer,
int basis,
ConcurrentHashMapV8.IntByIntToInt reducer)
Returns the result of accumulating the given transformation of all (key,
value) pairs using the given reducer to combine values, and the given
basis as an identity value.
|
long |
reduceToLongInParallel(ConcurrentHashMapV8.ObjectByObjectToLong<? super K,? super V> transformer,
long basis,
ConcurrentHashMapV8.LongByLongToLong reducer)
Returns the result of accumulating the given transformation of all (key,
value) pairs using the given reducer to combine values, and the given
basis as an identity value.
|
long |
reduceToLongSequentially(ConcurrentHashMapV8.ObjectByObjectToLong<? super K,? super V> transformer,
long basis,
ConcurrentHashMapV8.LongByLongToLong reducer)
Returns the result of accumulating the given transformation of all (key,
value) pairs using the given reducer to combine values, and the given
basis as an identity value.
|
V |
reduceValuesInParallel(ConcurrentHashMapV8.BiFun<? super V,? super V,? extends V> reducer)
Returns the result of accumulating all values using the given reducer to
combine values, or null if none.
|
<U> U |
reduceValuesInParallel(ConcurrentHashMapV8.Fun<? super V,? extends U> transformer,
ConcurrentHashMapV8.BiFun<? super U,? super U,? extends U> reducer)
Returns the result of accumulating the given transformation of all values
using the given reducer to combine values, or null if none.
|
V |
reduceValuesSequentially(ConcurrentHashMapV8.BiFun<? super V,? super V,? extends V> reducer)
Returns the result of accumulating all values using the given reducer to
combine values, or null if none.
|
<U> U |
reduceValuesSequentially(ConcurrentHashMapV8.Fun<? super V,? extends U> transformer,
ConcurrentHashMapV8.BiFun<? super U,? super U,? extends U> reducer)
Returns the result of accumulating the given transformation of all values
using the given reducer to combine values, or null if none.
|
double |
reduceValuesToDoubleInParallel(ConcurrentHashMapV8.ObjectToDouble<? super V> transformer,
double basis,
ConcurrentHashMapV8.DoubleByDoubleToDouble reducer)
Returns the result of accumulating the given transformation of all values
using the given reducer to combine values, and the given basis as an
identity value.
|
double |
reduceValuesToDoubleSequentially(ConcurrentHashMapV8.ObjectToDouble<? super V> transformer,
double basis,
ConcurrentHashMapV8.DoubleByDoubleToDouble reducer)
Returns the result of accumulating the given transformation of all values
using the given reducer to combine values, and the given basis as an
identity value.
|
int |
reduceValuesToIntInParallel(ConcurrentHashMapV8.ObjectToInt<? super V> transformer,
int basis,
ConcurrentHashMapV8.IntByIntToInt reducer)
Returns the result of accumulating the given transformation of all values
using the given reducer to combine values, and the given basis as an
identity value.
|
int |
reduceValuesToIntSequentially(ConcurrentHashMapV8.ObjectToInt<? super V> transformer,
int basis,
ConcurrentHashMapV8.IntByIntToInt reducer)
Returns the result of accumulating the given transformation of all values
using the given reducer to combine values, and the given basis as an
identity value.
|
long |
reduceValuesToLongInParallel(ConcurrentHashMapV8.ObjectToLong<? super V> transformer,
long basis,
ConcurrentHashMapV8.LongByLongToLong reducer)
Returns the result of accumulating the given transformation of all values
using the given reducer to combine values, and the given basis as an
identity value.
|
long |
reduceValuesToLongSequentially(ConcurrentHashMapV8.ObjectToLong<? super V> transformer,
long basis,
ConcurrentHashMapV8.LongByLongToLong reducer)
Returns the result of accumulating the given transformation of all values
using the given reducer to combine values, and the given basis as an
identity value.
|
V |
remove(Object key)
Removes the key (and its corresponding value) from this map.
|
boolean |
remove(Object key,
Object value) |
V |
replace(K key,
V value) |
boolean |
replace(K key,
V oldValue,
V newValue) |
<U> U |
searchEntriesInParallel(ConcurrentHashMapV8.Fun<Map.Entry<K,V>,? extends U> searchFunction)
Returns a non-null result from applying the given search function on each
entry, or null if none.
|
<U> U |
searchEntriesSequentially(ConcurrentHashMapV8.Fun<Map.Entry<K,V>,? extends U> searchFunction)
Returns a non-null result from applying the given search function on each
entry, or null if none.
|
<U> U |
searchInParallel(ConcurrentHashMapV8.BiFun<? super K,? super V,? extends U> searchFunction)
Returns a non-null result from applying the given search function on each
(key, value), or null if none.
|
<U> U |
searchKeysInParallel(ConcurrentHashMapV8.Fun<? super K,? extends U> searchFunction)
Returns a non-null result from applying the given search function on each
key, or null if none.
|
<U> U |
searchKeysSequentially(ConcurrentHashMapV8.Fun<? super K,? extends U> searchFunction)
Returns a non-null result from applying the given search function on each
key, or null if none.
|
<U> U |
searchSequentially(ConcurrentHashMapV8.BiFun<? super K,? super V,? extends U> searchFunction)
Returns a non-null result from applying the given search function on each
(key, value), or null if none.
|
<U> U |
searchValuesInParallel(ConcurrentHashMapV8.Fun<? super V,? extends U> searchFunction)
Returns a non-null result from applying the given search function on each
value, or null if none.
|
<U> U |
searchValuesSequentially(ConcurrentHashMapV8.Fun<? super V,? extends U> searchFunction)
Returns a non-null result from applying the given search function on each
value, or null if none.
|
int |
size() |
String |
toString()
Returns a string representation of this map.
|
ConcurrentHashMapV8.ValuesView<K,V> |
values()
Returns a
Collection view of the values contained in this map. |
ConcurrentHashMapV8.Spliterator<V> |
valueSpliterator()
Returns a partitionable iterator of the values in this map.
|
public ConcurrentHashMapV8()
public ConcurrentHashMapV8(int initialCapacity)
initialCapacity - The implementation performs internal sizing to
accommodate this many elements.IllegalArgumentException - if the initial capacity of elements is
negativepublic ConcurrentHashMapV8(Map<? extends K,? extends V> m)
m - the mappublic ConcurrentHashMapV8(int initialCapacity,
float loadFactor)
initialCapacity) and initial table density
(loadFactor).initialCapacity - the initial capacity. The implementation performs
internal sizing to accommodate this many elements, given the specified
load factor.loadFactor - the load factor (table density) for establishing the
initial table sizeIllegalArgumentException - if the initial capacity of elements is
negative or the load factor is nonpositivepublic ConcurrentHashMapV8(int initialCapacity,
float loadFactor,
int concurrencyLevel)
initialCapacity), table density
(loadFactor), and number of concurrently updating threads
(concurrencyLevel).initialCapacity - the initial capacity. The implementation performs
internal sizing to accommodate this many elements, given the specified
load factor.loadFactor - the load factor (table density) for establishing the
initial table sizeconcurrencyLevel - the estimated number of concurrently updating
threads. The implementation may use this value as a sizing hint.IllegalArgumentException - if the initial capacity is negative or
the load factor or concurrencyLevel are nonpositivepublic static <K> ConcurrentHashMapV8.KeySetView<K,Boolean> newKeySet()
Set backed by a ConcurrentHashMapV8 from the given
type to Boolean.TRUE.public static <K> ConcurrentHashMapV8.KeySetView<K,Boolean> newKeySet(int initialCapacity)
Set backed by a ConcurrentHashMapV8 from the given
type to Boolean.TRUE.initialCapacity - The implementation performs internal sizing to
accommodate this many elements.IllegalArgumentException - if the initial capacity of elements is
negativepublic long mappingCount()
size() because a ConcurrentHashMapV8 may contain more mappings
than can be represented as an int. The value returned is an estimate; the
actual count may differ if there are concurrent insertions or removals.public V get(Object key)
null
if this map contains no mapping for the key.
More formally, if this map contains a mapping from a key k to
a value v such that key.equals(k), then this method
returns v; otherwise it returns null. (There can be at
most one such mapping.)
get 在接口中 Map<K,V>NullPointerException - if the specified key is nullpublic V getValueOrDefault(Object key, V defaultValue)
key - the keydefaultValue - the value to return if this map contains no mapping
for the given keyNullPointerException - if the specified key is nullpublic boolean containsKey(Object key)
containsKey 在接口中 Map<K,V>key - possible keytrue if and only if the specified object is a key in this
table, as determined by the equals method; false
otherwiseNullPointerException - if the specified key is nullpublic boolean containsValue(Object value)
true if this map maps one or more keys to the specified
value. Note: This method may require a full traversal of the map, and is
much slower than method containsKey.containsValue 在接口中 Map<K,V>value - value whose presence in this map is to be testedtrue if this map maps one or more keys to the specified
valueNullPointerException - if the specified value is null@Deprecated public boolean contains(Object value)
containsValue(java.lang.Object), and exists solely to ensure full compatibility
with class Hashtable, which supported this method prior
to introduction of the Java Collections framework.value - a value to search fortrue if and only if some key maps to the value
argument in this table as determined by the equals method;
false otherwiseNullPointerException - if the specified value is nullpublic V put(K key, V value)
The value can be retrieved by calling the get method with a
key that is equal to the original key.
put 在接口中 Map<K,V>key - key with which the specified value is to be associatedvalue - value to be associated with the specified keykey, or null
if there was no mapping for keyNullPointerException - if the specified key or value is nullpublic V putIfAbsent(K key, V value)
putIfAbsent 在接口中 ConcurrentMap<K,V>null if there was no mapping for the keyNullPointerException - if the specified key or value is nullpublic void putAll(Map<? extends K,? extends V> m)
public V computeIfAbsent(K key, ConcurrentHashMapV8.Fun<? super K,? extends V> mappingFunction)
if (map.containsKey(key))
return map.get(key);
value = mappingFunction.apply(key);
if (value != null)
map.put(key, value);
return value;
except that the action is performed atomically. If the function returns
null no mapping is recorded. If the function itself throws an
(unchecked) exception, the exception is rethrown to its caller, and no
mapping is recorded. Some attempted update operations on this map by
other threads may be blocked while computation is in progress, so the
computation should be short and simple, and must not attempt to update
any other mappings of this Map. The most appropriate usage is to
construct a new object serving as an initial mapped value, or memoized
result, as in:
map.computeIfAbsent(key, new Fun<K,V>() {
public V map(K k) { return new Value(f(k)); }});key - key with which the specified value is to be associatedmappingFunction - the function to compute a valueNullPointerException - if the specified key or mappingFunction is
nullIllegalStateException - if the computation detectably attempts a
recursive update to this map that would otherwise never completeRuntimeException - or Error if the mappingFunction does so, in
which case the mapping is left unestablishedpublic V computeIfPresent(K key, ConcurrentHashMapV8.BiFun<? super K,? super V,? extends V> remappingFunction)
if (map.containsKey(key)) {
value = remappingFunction.apply(key, map.get(key));
if (value != null)
map.put(key, value);
else
map.remove(key);
}
except that the action is performed atomically. If the function returns
null, the mapping is removed. If the function itself throws an
(unchecked) exception, the exception is rethrown to its caller, and the
current mapping is left unchanged. Some attempted update operations on
this map by other threads may be blocked while computation is in
progress, so the computation should be short and simple, and must not
attempt to update any other mappings of this Map. For example, to either
create or append new messages to a value mapping:key - key with which the specified value is to be associatedremappingFunction - the function to compute a valueNullPointerException - if the specified key or remappingFunction is
nullIllegalStateException - if the computation detectably attempts a
recursive update to this map that would otherwise never completeRuntimeException - or Error if the remappingFunction does so, in
which case the mapping is unchangedpublic V compute(K key, ConcurrentHashMapV8.BiFun<? super K,? super V,? extends V> remappingFunction)
null if there is no current mapping). This is equivalent to
value = remappingFunction.apply(key, map.get(key));
if (value != null)
map.put(key, value);
else
map.remove(key);
except that the action is performed atomically. If the function returns
null, the mapping is removed. If the function itself throws an
(unchecked) exception, the exception is rethrown to its caller, and the
current mapping is left unchanged. Some attempted update operations on
this map by other threads may be blocked while computation is in
progress, so the computation should be short and simple, and must not
attempt to update any other mappings of this Map. For example, to either
create or append new messages to a value mapping:
Map<Key, String> map = ...;
final String msg = ...;
map.compute(key, new BiFun<Key, String, String>() {
public String apply(Key k, String v) {
return (v == null) ? msg : v + msg;});}key - key with which the specified value is to be associatedremappingFunction - the function to compute a valueNullPointerException - if the specified key or remappingFunction is
nullIllegalStateException - if the computation detectably attempts a
recursive update to this map that would otherwise never completeRuntimeException - or Error if the remappingFunction does so, in
which case the mapping is unchangedpublic V merge(K key, V value, ConcurrentHashMapV8.BiFun<? super V,? super V,? extends V> remappingFunction)
if (!map.containsKey(key))
map.put(value);
else {
newValue = remappingFunction.apply(map.get(key), value);
if (value != null)
map.put(key, value);
else
map.remove(key);
}
except that the action is performed atomically. If the function
returns null, the mapping is removed. If the function itself
throws an (unchecked) exception, the exception is rethrown to its caller,
and the current mapping is left unchanged. Some attempted update
operations on this map by other threads may be blocked while computation
is in progress, so the computation should be short and simple, and must
not attempt to update any other mappings of this Map.public V remove(Object key)
remove 在接口中 Map<K,V>key - the key that needs to be removedkey, or null
if there was no mapping for keyNullPointerException - if the specified key is nullpublic boolean remove(Object key, Object value)
remove 在接口中 ConcurrentMap<K,V>NullPointerException - if the specified key is nullpublic boolean replace(K key, V oldValue, V newValue)
replace 在接口中 ConcurrentMap<K,V>NullPointerException - if any of the arguments are nullpublic V replace(K key, V value)
replace 在接口中 ConcurrentMap<K,V>null if there was no mapping for the keyNullPointerException - if the specified key or value is nullpublic ConcurrentHashMapV8.KeySetView<K,V> keySet()
Set view of the keys contained in this map. The set is
backed by the map, so changes to the map are reflected in the set, and
vice-versa.public ConcurrentHashMapV8.KeySetView<K,V> keySet(V mappedValue)
Set view of the keys in this map, using the given
common mapped value for any additions (i.e., Collection.add(E) and Collection.addAll(java.util.Collection<? extends E>)). This is of course only
appropriate if it is acceptable to use the same value for all additions
from this view.mappedValue - the mapped value to use for any additionsNullPointerException - if the mappedValue is nullpublic ConcurrentHashMapV8.ValuesView<K,V> values()
Collection view of the values contained in this map.
The collection is backed by the map, so changes to the map are reflected
in the collection, and vice-versa.public Set<Map.Entry<K,V>> entrySet()
Set view of the mappings contained in this map. The set
is backed by the map, so changes to the map are reflected in the set, and
vice-versa. The set supports element removal, which removes the
corresponding mapping from the map, via the Iterator.remove, Set.remove,
removeAll, retainAll, and clear operations. It
does not support the add or addAll operations.
The view's iterator is a "weakly consistent" iterator that
will never throw ConcurrentModificationException, and guarantees
to traverse elements as they existed upon construction of the iterator,
and may (but is not guaranteed to) reflect any modifications subsequent
to construction.
public Enumeration<K> keys()
keySet()public Enumeration<V> elements()
values()public ConcurrentHashMapV8.Spliterator<K> keySpliterator()
public ConcurrentHashMapV8.Spliterator<V> valueSpliterator()
public ConcurrentHashMapV8.Spliterator<Map.Entry<K,V>> entrySpliterator()
public int hashCode()
Map, i.e., the sum of, for
each key-value pair in the map,
key.hashCode() ^ value.hashCode().public String toString()
{}"). Adjacent mappings are separated by the
characters ", " (comma and space). Each key-value mapping is
rendered as the key followed by an equals sign ("=") followed by
the associated value.public boolean equals(Object o)
true if the given object is a map with the same mappings as this
map. This operation may return misleading results if either map is
concurrently modified during execution of this method.public void forEachSequentially(ConcurrentHashMapV8.BiAction<K,V> action)
action - the actionpublic <U> void forEachSequentially(ConcurrentHashMapV8.BiFun<? super K,? super V,? extends U> transformer, ConcurrentHashMapV8.Action<U> action)
transformer - a function returning the transformation for an
element, or null if there is no transformation (in which case the action
is not applied)action - the actionpublic <U> U searchSequentially(ConcurrentHashMapV8.BiFun<? super K,? super V,? extends U> searchFunction)
searchFunction - a function returning a non-null result on success,
else nullpublic <U> U reduceSequentially(ConcurrentHashMapV8.BiFun<? super K,? super V,? extends U> transformer, ConcurrentHashMapV8.BiFun<? super U,? super U,? extends U> reducer)
transformer - a function returning the transformation for an
element, or null if there is no transformation (in which case it is not
combined)reducer - a commutative associative combining functionpublic double reduceToDoubleSequentially(ConcurrentHashMapV8.ObjectByObjectToDouble<? super K,? super V> transformer, double basis, ConcurrentHashMapV8.DoubleByDoubleToDouble reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic long reduceToLongSequentially(ConcurrentHashMapV8.ObjectByObjectToLong<? super K,? super V> transformer, long basis, ConcurrentHashMapV8.LongByLongToLong reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic int reduceToIntSequentially(ConcurrentHashMapV8.ObjectByObjectToInt<? super K,? super V> transformer, int basis, ConcurrentHashMapV8.IntByIntToInt reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic void forEachKeySequentially(ConcurrentHashMapV8.Action<K> action)
action - the actionpublic <U> void forEachKeySequentially(ConcurrentHashMapV8.Fun<? super K,? extends U> transformer, ConcurrentHashMapV8.Action<U> action)
transformer - a function returning the transformation for an
element, or null if there is no transformation (in which case the action
is not applied)action - the actionpublic <U> U searchKeysSequentially(ConcurrentHashMapV8.Fun<? super K,? extends U> searchFunction)
searchFunction - a function returning a non-null result on success,
else nullpublic K reduceKeysSequentially(ConcurrentHashMapV8.BiFun<? super K,? super K,? extends K> reducer)
reducer - a commutative associative combining functionpublic <U> U reduceKeysSequentially(ConcurrentHashMapV8.Fun<? super K,? extends U> transformer, ConcurrentHashMapV8.BiFun<? super U,? super U,? extends U> reducer)
transformer - a function returning the transformation for an
element, or null if there is no transformation (in which case it is not
combined)reducer - a commutative associative combining functionpublic double reduceKeysToDoubleSequentially(ConcurrentHashMapV8.ObjectToDouble<? super K> transformer, double basis, ConcurrentHashMapV8.DoubleByDoubleToDouble reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic long reduceKeysToLongSequentially(ConcurrentHashMapV8.ObjectToLong<? super K> transformer, long basis, ConcurrentHashMapV8.LongByLongToLong reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic int reduceKeysToIntSequentially(ConcurrentHashMapV8.ObjectToInt<? super K> transformer, int basis, ConcurrentHashMapV8.IntByIntToInt reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic void forEachValueSequentially(ConcurrentHashMapV8.Action<V> action)
action - the actionpublic <U> void forEachValueSequentially(ConcurrentHashMapV8.Fun<? super V,? extends U> transformer, ConcurrentHashMapV8.Action<U> action)
transformer - a function returning the transformation for an
element, or null if there is no transformation (in which case the action
is not applied)public <U> U searchValuesSequentially(ConcurrentHashMapV8.Fun<? super V,? extends U> searchFunction)
searchFunction - a function returning a non-null result on success,
else nullpublic V reduceValuesSequentially(ConcurrentHashMapV8.BiFun<? super V,? super V,? extends V> reducer)
reducer - a commutative associative combining functionpublic <U> U reduceValuesSequentially(ConcurrentHashMapV8.Fun<? super V,? extends U> transformer, ConcurrentHashMapV8.BiFun<? super U,? super U,? extends U> reducer)
transformer - a function returning the transformation for an
element, or null if there is no transformation (in which case it is not
combined)reducer - a commutative associative combining functionpublic double reduceValuesToDoubleSequentially(ConcurrentHashMapV8.ObjectToDouble<? super V> transformer, double basis, ConcurrentHashMapV8.DoubleByDoubleToDouble reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic long reduceValuesToLongSequentially(ConcurrentHashMapV8.ObjectToLong<? super V> transformer, long basis, ConcurrentHashMapV8.LongByLongToLong reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic int reduceValuesToIntSequentially(ConcurrentHashMapV8.ObjectToInt<? super V> transformer, int basis, ConcurrentHashMapV8.IntByIntToInt reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic void forEachEntrySequentially(ConcurrentHashMapV8.Action<Map.Entry<K,V>> action)
action - the actionpublic <U> void forEachEntrySequentially(ConcurrentHashMapV8.Fun<Map.Entry<K,V>,? extends U> transformer, ConcurrentHashMapV8.Action<U> action)
transformer - a function returning the transformation for an
element, or null if there is no transformation (in which case the action
is not applied)action - the actionpublic <U> U searchEntriesSequentially(ConcurrentHashMapV8.Fun<Map.Entry<K,V>,? extends U> searchFunction)
searchFunction - a function returning a non-null result on success,
else nullpublic Map.Entry<K,V> reduceEntriesSequentially(ConcurrentHashMapV8.BiFun<Map.Entry<K,V>,Map.Entry<K,V>,? extends Map.Entry<K,V>> reducer)
reducer - a commutative associative combining functionpublic <U> U reduceEntriesSequentially(ConcurrentHashMapV8.Fun<Map.Entry<K,V>,? extends U> transformer, ConcurrentHashMapV8.BiFun<? super U,? super U,? extends U> reducer)
transformer - a function returning the transformation for an
element, or null if there is no transformation (in which case it is not
combined)reducer - a commutative associative combining functionpublic double reduceEntriesToDoubleSequentially(ConcurrentHashMapV8.ObjectToDouble<Map.Entry<K,V>> transformer, double basis, ConcurrentHashMapV8.DoubleByDoubleToDouble reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic long reduceEntriesToLongSequentially(ConcurrentHashMapV8.ObjectToLong<Map.Entry<K,V>> transformer, long basis, ConcurrentHashMapV8.LongByLongToLong reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic int reduceEntriesToIntSequentially(ConcurrentHashMapV8.ObjectToInt<Map.Entry<K,V>> transformer, int basis, ConcurrentHashMapV8.IntByIntToInt reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic void forEachInParallel(ConcurrentHashMapV8.BiAction<K,V> action)
action - the actionpublic <U> void forEachInParallel(ConcurrentHashMapV8.BiFun<? super K,? super V,? extends U> transformer, ConcurrentHashMapV8.Action<U> action)
transformer - a function returning the transformation for an
element, or null if there is no transformation (in which case the action
is not applied)action - the actionpublic <U> U searchInParallel(ConcurrentHashMapV8.BiFun<? super K,? super V,? extends U> searchFunction)
searchFunction - a function returning a non-null result on success,
else nullpublic <U> U reduceInParallel(ConcurrentHashMapV8.BiFun<? super K,? super V,? extends U> transformer, ConcurrentHashMapV8.BiFun<? super U,? super U,? extends U> reducer)
transformer - a function returning the transformation for an
element, or null if there is no transformation (in which case it is not
combined)reducer - a commutative associative combining functionpublic double reduceToDoubleInParallel(ConcurrentHashMapV8.ObjectByObjectToDouble<? super K,? super V> transformer, double basis, ConcurrentHashMapV8.DoubleByDoubleToDouble reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic long reduceToLongInParallel(ConcurrentHashMapV8.ObjectByObjectToLong<? super K,? super V> transformer, long basis, ConcurrentHashMapV8.LongByLongToLong reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic int reduceToIntInParallel(ConcurrentHashMapV8.ObjectByObjectToInt<? super K,? super V> transformer, int basis, ConcurrentHashMapV8.IntByIntToInt reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic void forEachKeyInParallel(ConcurrentHashMapV8.Action<K> action)
action - the actionpublic <U> void forEachKeyInParallel(ConcurrentHashMapV8.Fun<? super K,? extends U> transformer, ConcurrentHashMapV8.Action<U> action)
transformer - a function returning the transformation for an
element, or null if there is no transformation (in which case the action
is not applied)action - the actionpublic <U> U searchKeysInParallel(ConcurrentHashMapV8.Fun<? super K,? extends U> searchFunction)
searchFunction - a function returning a non-null result on success,
else nullpublic K reduceKeysInParallel(ConcurrentHashMapV8.BiFun<? super K,? super K,? extends K> reducer)
reducer - a commutative associative combining functionpublic <U> U reduceKeysInParallel(ConcurrentHashMapV8.Fun<? super K,? extends U> transformer, ConcurrentHashMapV8.BiFun<? super U,? super U,? extends U> reducer)
transformer - a function returning the transformation for an
element, or null if there is no transformation (in which case it is not
combined)reducer - a commutative associative combining functionpublic double reduceKeysToDoubleInParallel(ConcurrentHashMapV8.ObjectToDouble<? super K> transformer, double basis, ConcurrentHashMapV8.DoubleByDoubleToDouble reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic long reduceKeysToLongInParallel(ConcurrentHashMapV8.ObjectToLong<? super K> transformer, long basis, ConcurrentHashMapV8.LongByLongToLong reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic int reduceKeysToIntInParallel(ConcurrentHashMapV8.ObjectToInt<? super K> transformer, int basis, ConcurrentHashMapV8.IntByIntToInt reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic void forEachValueInParallel(ConcurrentHashMapV8.Action<V> action)
action - the actionpublic <U> void forEachValueInParallel(ConcurrentHashMapV8.Fun<? super V,? extends U> transformer, ConcurrentHashMapV8.Action<U> action)
transformer - a function returning the transformation for an
element, or null if there is no transformation (in which case the action
is not applied)public <U> U searchValuesInParallel(ConcurrentHashMapV8.Fun<? super V,? extends U> searchFunction)
searchFunction - a function returning a non-null result on success,
else nullpublic V reduceValuesInParallel(ConcurrentHashMapV8.BiFun<? super V,? super V,? extends V> reducer)
reducer - a commutative associative combining functionpublic <U> U reduceValuesInParallel(ConcurrentHashMapV8.Fun<? super V,? extends U> transformer, ConcurrentHashMapV8.BiFun<? super U,? super U,? extends U> reducer)
transformer - a function returning the transformation for an
element, or null if there is no transformation (in which case it is not
combined)reducer - a commutative associative combining functionpublic double reduceValuesToDoubleInParallel(ConcurrentHashMapV8.ObjectToDouble<? super V> transformer, double basis, ConcurrentHashMapV8.DoubleByDoubleToDouble reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic long reduceValuesToLongInParallel(ConcurrentHashMapV8.ObjectToLong<? super V> transformer, long basis, ConcurrentHashMapV8.LongByLongToLong reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic int reduceValuesToIntInParallel(ConcurrentHashMapV8.ObjectToInt<? super V> transformer, int basis, ConcurrentHashMapV8.IntByIntToInt reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic void forEachEntryInParallel(ConcurrentHashMapV8.Action<Map.Entry<K,V>> action)
action - the actionpublic <U> void forEachEntryInParallel(ConcurrentHashMapV8.Fun<Map.Entry<K,V>,? extends U> transformer, ConcurrentHashMapV8.Action<U> action)
transformer - a function returning the transformation for an
element, or null if there is no transformation (in which case the action
is not applied)action - the actionpublic <U> U searchEntriesInParallel(ConcurrentHashMapV8.Fun<Map.Entry<K,V>,? extends U> searchFunction)
searchFunction - a function returning a non-null result on success,
else nullpublic Map.Entry<K,V> reduceEntriesInParallel(ConcurrentHashMapV8.BiFun<Map.Entry<K,V>,Map.Entry<K,V>,? extends Map.Entry<K,V>> reducer)
reducer - a commutative associative combining functionpublic <U> U reduceEntriesInParallel(ConcurrentHashMapV8.Fun<Map.Entry<K,V>,? extends U> transformer, ConcurrentHashMapV8.BiFun<? super U,? super U,? extends U> reducer)
transformer - a function returning the transformation for an
element, or null if there is no transformation (in which case it is not
combined)reducer - a commutative associative combining functionpublic double reduceEntriesToDoubleInParallel(ConcurrentHashMapV8.ObjectToDouble<Map.Entry<K,V>> transformer, double basis, ConcurrentHashMapV8.DoubleByDoubleToDouble reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic long reduceEntriesToLongInParallel(ConcurrentHashMapV8.ObjectToLong<Map.Entry<K,V>> transformer, long basis, ConcurrentHashMapV8.LongByLongToLong reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionpublic int reduceEntriesToIntInParallel(ConcurrentHashMapV8.ObjectToInt<Map.Entry<K,V>> transformer, int basis, ConcurrentHashMapV8.IntByIntToInt reducer)
transformer - a function returning the transformation for an elementbasis - the identity (initial default value) for the reductionreducer - a commutative associative combining functionCopyright © 2013 The Skfiy Open Association. All Rights Reserved.