ConcurrentHashMapV8 (Netty/Common 4.0.0.CR9 API)

java.lang.Object
- io.netty.util.internal.chmv8.ConcurrentHashMapV8<K,V>

Type Parameters:
K - the type of keys maintained by this map
V - the type of mapped values

All Implemented Interfaces:

Serializable, ConcurrentMap<K,V>, Map<K,V>
```
public final class ConcurrentHashMapV8<K,V>
extends Object
implements ConcurrentMap<K,V>, Serializable
```
A hash table supporting full concurrency of retrievals and high expected concurrency for updates. This class obeys the same functional specification as 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, io.netty.util.internal.chmv8.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.
- forEach: Perform a given action on each element. A variant form applies a given transformation on each element before performing the action.
- search: Return the first available non-null result of applying a given function on each element; skipping further search when a result is found.
- reduce: Accumulate each element. The supplied reduction function cannot rely on ordering (more formally, it should be both associative and commutative). There are five variants:
 - Plain reductions. (There is not a form of this method for (key, value) function arguments since there is no corresponding return type.)
 - Mapped reductions that accumulate the results of a given function applied to each element.
 - Reductions to scalar doubles, longs, and ints, using a given basis value.
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.
Since:

1.5

See Also:
Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`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.

Nested classes/interfaces inherited from interface java.util.Map
Map.Entry<K,V>

Constructor Summary

Constructors
Constructor and Description
`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.

Method Summary

Methods
Modifier and Type	Method and Description
`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)` Deprecated.
`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.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
 - ConcurrentHashMapV8
```
public ConcurrentHashMapV8()
```
 Creates a new, empty map with the default initial table size (16).
 - ConcurrentHashMapV8
```
public 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.
 
 Parameters:
 initialCapacity - The implementation performs internal sizing to accommodate this many elements.
 
 Throws:
 
 IllegalArgumentException - if the initial capacity of elements is negative
 - ConcurrentHashMapV8
```
public ConcurrentHashMapV8(Map<? extends K,? extends V> m)
```
 Creates a new map with the same mappings as the given map.
 
 Parameters:
 m - the map
 - ConcurrentHashMapV8
```
public 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).
 
 Parameters:
 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 size
 
 Throws:
 
 IllegalArgumentException - if the initial capacity of elements is negative or the load factor is nonpositive
 Since:
 
 1.6
 - ConcurrentHashMapV8
```
public 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).
 
 Parameters:
 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 size
 concurrencyLevel - the estimated number of concurrently updating threads. The implementation may use this value as a sizing hint.
 
 Throws:
 
 IllegalArgumentException - if the initial capacity is negative or the load factor or concurrencyLevel are nonpositive
- Method Detail
 - newKeySet
```
public static <K> ConcurrentHashMapV8.KeySetView<K,Boolean> newKeySet()
```
 Creates a new Set backed by a ConcurrentHashMapV8 from the given type to Boolean.TRUE.
 
 Returns:
 the new set
 - newKeySet
```
public static <K> ConcurrentHashMapV8.KeySetView<K,Boolean> newKeySet(int initialCapacity)
```
 Creates a new Set backed by a ConcurrentHashMapV8 from the given type to Boolean.TRUE.
 
 Parameters:
 initialCapacity - The implementation performs internal sizing to accommodate this many elements.
 
 Returns:
 the new set
 
 Throws:
 
 IllegalArgumentException - if the initial capacity of elements is negative
 - isEmpty
```
public boolean isEmpty()
```
 Specified by:
 
 isEmpty in interface Map<K,V>
 - size
```
public int size()
```
 Specified by:
 
 size in interface Map<K,V>
 - mappingCount
```
public long mappingCount()
```
 Returns the number of mappings. This method should be used instead of 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.
 
 Returns:
 the number of mappings
 - get
```
public 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.
 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.)
 
 Specified by:
 
 get in interface Map<K,V>
 
 Throws:
 
 NullPointerException - if the specified key is null
 - getValueOrDefault
```
public 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.
 
 Parameters:
 key - the key
 defaultValue - the value to return if this map contains no mapping for the given key
 
 Returns:
 the mapping for the key, if present; else the defaultValue
 
 Throws:
 
 NullPointerException - if the specified key is null
 - containsKey
```
public boolean containsKey(Object key)
```
 Tests if the specified object is a key in this table.
 
 Specified by:
 
 containsKey in interface Map<K,V>
 
 Parameters:
 key - possible key
 
 Returns:
 true if and only if the specified object is a key in this table, as determined by the equals method; false otherwise
 
 Throws:
 
 NullPointerException - if the specified key is null
 - containsValue
```
public boolean containsValue(Object value)
```
 Returns 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.
 
 Specified by:
 
 containsValue in interface Map<K,V>
 
 Parameters:
 value - value whose presence in this map is to be tested
 
 Returns:
 true if this map maps one or more keys to the specified value
 
 Throws:
 
 NullPointerException - if the specified value is null
 - contains
```
@Deprecated
public boolean contains(Object value)
```
 Deprecated.
 
 Legacy method testing if some key maps into the specified value in this table. This method is identical in functionality to 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.
 
 Parameters:
 value - a value to search for
 
 Returns:
 true if and only if some key maps to the value argument in this table as determined by the equals method; false otherwise
 
 Throws:
 
 NullPointerException - if the specified value is null
 - put
```
public V put(K key,
 V value)
```
 Maps the specified key to the specified value in this table. Neither the key nor the value can be null.
 The value can be retrieved by calling the get method with a key that is equal to the original key.
 
 Specified by:
 
 put in interface Map<K,V>
 
 Parameters:
 key - key with which the specified value is to be associated
 value - value to be associated with the specified key
 
 Returns:
 the previous value associated with key, or null if there was no mapping for key
 
 Throws:
 
 NullPointerException - if the specified key or value is null
 - putIfAbsent
```
public V putIfAbsent(K key,
 V value)
```
 Specified by:
 
 putIfAbsent in interface ConcurrentMap<K,V>
 
 Returns:
 the previous value associated with the specified key, or null if there was no mapping for the key
 
 Throws:
 
 NullPointerException - if the specified key or value is null
 - putAll
```
public void putAll(Map<? extends K,? extends V> m)
```
 Copies all of the mappings from the specified map to this one. These mappings replace any mappings that this map had for any of the keys currently in the specified map.
 
 Specified by:
 
 putAll in interface Map<K,V>
 
 Parameters:
 m - mappings to be stored in this map
 - computeIfAbsent
```
public 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. This is equivalent to
```
 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)); }});
```
 Parameters:
 key - key with which the specified value is to be associated
 mappingFunction - the function to compute a value
 
 Returns:
 the current (existing or computed) value associated with the specified key, or null if the computed value is null
 
 Throws:
 
 NullPointerException - if the specified key or mappingFunction is null
 
 IllegalStateException - if the computation detectably attempts a recursive update to this map that would otherwise never complete
 
 RuntimeException - or Error if the mappingFunction does so, in which case the mapping is left unestablished
 - computeIfPresent
```
public 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. This is equivalent to
```
 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:
 Parameters:
 key - key with which the specified value is to be associated
 remappingFunction - the function to compute a value
 
 Returns:
 the new value associated with the specified key, or null if none
 
 Throws:
 
 NullPointerException - if the specified key or remappingFunction is null
 
 IllegalStateException - if the computation detectably attempts a recursive update to this map that would otherwise never complete
 
 RuntimeException - or Error if the remappingFunction does so, in which case the mapping is unchanged
 - compute
```
public 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). 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;});}
```
 Parameters:
 key - key with which the specified value is to be associated
 remappingFunction - the function to compute a value
 
 Returns:
 the new value associated with the specified key, or null if none
 
 Throws:
 
 NullPointerException - if the specified key or remappingFunction is null
 
 IllegalStateException - if the computation detectably attempts a recursive update to this map that would otherwise never complete
 
 RuntimeException - or Error if the remappingFunction does so, in which case the mapping is unchanged
 - merge
```
public 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. Otherwise, replace the value with the results of the given remapping function. This is equivalent to:
```
 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.
 - remove
```
public V remove(Object key)
```
 Removes the key (and its corresponding value) from this map. This method does nothing if the key is not in the map.
 
 Specified by:
 
 remove in interface Map<K,V>
 
 Parameters:
 key - the key that needs to be removed
 
 Returns:
 the previous value associated with key, or null if there was no mapping for key
 
 Throws:
 
 NullPointerException - if the specified key is null
 - remove
```
public boolean remove(Object key,
 Object value)
```
 Specified by:
 
 remove in interface ConcurrentMap<K,V>
 
 Throws:
 
 NullPointerException - if the specified key is null
 - replace
```
public boolean replace(K key,
 V oldValue,
 V newValue)
```
 Specified by:
 
 replace in interface ConcurrentMap<K,V>
 
 Throws:
 
 NullPointerException - if any of the arguments are null
 - replace
```
public V replace(K key,
 V value)
```
 Specified by:
 
 replace in interface ConcurrentMap<K,V>
 
 Returns:
 the previous value associated with the specified key, or null if there was no mapping for the key
 
 Throws:
 
 NullPointerException - if the specified key or value is null
 - clear
```
public void clear()
```
 Removes all of the mappings from this map.
 
 Specified by:
 
 clear in interface Map<K,V>
 - keySet
```
public ConcurrentHashMapV8.KeySetView<K,V> keySet()
```
 Returns a 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.
 
 Specified by:
 
 keySet in interface Map<K,V>
 
 Returns:
 the set view
 - keySet
```
public 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>)). This is of course only appropriate if it is acceptable to use the same value for all additions from this view.
 
 Parameters:
 mappedValue - the mapped value to use for any additions
 
 Returns:
 the set view
 
 Throws:
 
 NullPointerException - if the mappedValue is null
 - values
```
public ConcurrentHashMapV8.ValuesView<K,V> values()
```
 Returns a 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.
 
 Specified by:
 
 values in interface Map<K,V>
 - entrySet
```
public Set<Map.Entry<K,V>> entrySet()
```
 Returns a 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.
 
 Specified by:
 
 entrySet in interface Map<K,V>
 - keys
```
public Enumeration<K> keys()
```
 Returns an enumeration of the keys in this table.
 
 Returns:
 an enumeration of the keys in this table
 See Also:
 keySet()
 - elements
```
public Enumeration<V> elements()
```
 Returns an enumeration of the values in this table.
 
 Returns:
 an enumeration of the values in this table
 See Also:
 values()
 - keySpliterator
```
public ConcurrentHashMapV8.Spliterator<K> keySpliterator()
```
 Returns a partitionable iterator of the keys in this map.
 
 Returns:
 a partitionable iterator of the keys in this map
 - valueSpliterator
```
public ConcurrentHashMapV8.Spliterator<V> valueSpliterator()
```
 Returns a partitionable iterator of the values in this map.
 
 Returns:
 a partitionable iterator of the values in this map
 - entrySpliterator
```
public ConcurrentHashMapV8.Spliterator<Map.Entry<K,V>> entrySpliterator()
```
 Returns a partitionable iterator of the entries in this map.
 
 Returns:
 a partitionable iterator of the entries in this map
 - hashCode
```
public 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().
 
 Specified by:
 
 hashCode in interface Map<K,V>
 
 Overrides:
 
 hashCode in class Object
 
 Returns:
 the hash code value for this map
 - toString
```
public String toString()
```
 Returns a string representation of this map. The string representation consists of a list of key-value mappings (in no particular order) enclosed in braces ("{}"). 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.
 
 Overrides:
 
 toString in class Object
 
 Returns:
 a string representation of this map
 - equals
```
public boolean equals(Object o)
```
 Compares the specified object with this map for equality. Returns 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.
 
 Specified by:
 
 equals in interface Map<K,V>
 
 Overrides:
 
 equals in class Object
 
 Parameters:
 o - object to be compared for equality with this map
 
 Returns:
 true if the specified object is equal to this map
 - forEachSequentially
```
public void forEachSequentially(ConcurrentHashMapV8.BiAction<K,V> action)
```
 Performs the given action for each (key, value).
 
 Parameters:
 action - the action
 - forEachSequentially
```
public  void forEachSequentially(ConcurrentHashMapV8.BiFun<? super K,? super V,? extends U> transformer,
 ConcurrentHashMapV8.Action action)
```
 Performs the given action for each non-null transformation of each (key, value).
 
 Parameters:
 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 action
 - searchSequentially
```
public  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.
 
 Parameters:
 searchFunction - a function returning a non-null result on success, else null
 
 Returns:
 a non-null result from applying the given search function on each (key, value), or null if none
 - reduceSequentially
```
public  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.
 
 Parameters:
 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 function
 
 Returns:
 the result of accumulating the given transformation of all (key, value) pairs
 - reduceToDoubleSequentially
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all (key, value) pairs
 - reduceToLongSequentially
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all (key, value) pairs
 - reduceToIntSequentially
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all (key, value) pairs
 - forEachKeySequentially
```
public void forEachKeySequentially(ConcurrentHashMapV8.Action<K> action)
```
 Performs the given action for each key.
 
 Parameters:
 action - the action
 - forEachKeySequentially
```
public  void forEachKeySequentially(ConcurrentHashMapV8.Fun<? super K,? extends U> transformer,
 ConcurrentHashMapV8.Action action)
```
 Performs the given action for each non-null transformation of each key.
 
 Parameters:
 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 action
 - searchKeysSequentially
```
public  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.
 
 Parameters:
 searchFunction - a function returning a non-null result on success, else null
 
 Returns:
 a non-null result from applying the given search function on each key, or null if none
 - reduceKeysSequentially
```
public 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.
 
 Parameters:
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating all keys using the given reducer to combine values, or null if none
 - reduceKeysSequentially
```
public  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.
 
 Parameters:
 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 function
 
 Returns:
 the result of accumulating the given transformation of all keys
 - reduceKeysToDoubleSequentially
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all keys
 - reduceKeysToLongSequentially
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all keys
 - reduceKeysToIntSequentially
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all keys
 - forEachValueSequentially
```
public void forEachValueSequentially(ConcurrentHashMapV8.Action<V> action)
```
 Performs the given action for each value.
 
 Parameters:
 action - the action
 - forEachValueSequentially
```
public  void forEachValueSequentially(ConcurrentHashMapV8.Fun<? super V,? extends U> transformer,
 ConcurrentHashMapV8.Action action)
```
 Performs the given action for each non-null transformation of each value.
 
 Parameters:
 transformer - a function returning the transformation for an element, or null if there is no transformation (in which case the action is not applied)
 - searchValuesSequentially
```
public  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.
 
 Parameters:
 searchFunction - a function returning a non-null result on success, else null
 
 Returns:
 a non-null result from applying the given search function on each value, or null if none
 - reduceValuesSequentially
```
public 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.
 
 Parameters:
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating all values
 - reduceValuesSequentially
```
public  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.
 
 Parameters:
 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 function
 
 Returns:
 the result of accumulating the given transformation of all values
 - reduceValuesToDoubleSequentially
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all values
 - reduceValuesToLongSequentially
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all values
 - reduceValuesToIntSequentially
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all values
 - forEachEntrySequentially
```
public void forEachEntrySequentially(ConcurrentHashMapV8.Action<Map.Entry<K,V>> action)
```
 Performs the given action for each entry.
 
 Parameters:
 action - the action
 - forEachEntrySequentially
```
public  void forEachEntrySequentially(ConcurrentHashMapV8.Fun<Map.Entry<K,V>,? extends U> transformer,
 ConcurrentHashMapV8.Action action)
```
 Performs the given action for each non-null transformation of each entry.
 
 Parameters:
 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 action
 - searchEntriesSequentially
```
public  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.
 
 Parameters:
 searchFunction - a function returning a non-null result on success, else null
 
 Returns:
 a non-null result from applying the given search function on each entry, or null if none
 - reduceEntriesSequentially
```
public 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.
 
 Parameters:
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating all entries
 - reduceEntriesSequentially
```
public  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.
 
 Parameters:
 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 function
 
 Returns:
 the result of accumulating the given transformation of all entries
 - reduceEntriesToDoubleSequentially
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all entries
 - reduceEntriesToLongSequentially
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all entries
 - reduceEntriesToIntSequentially
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all entries
 - forEachInParallel
```
public void forEachInParallel(ConcurrentHashMapV8.BiAction<K,V> action)
```
 Performs the given action for each (key, value).
 
 Parameters:
 action - the action
 - forEachInParallel
```
public  void forEachInParallel(ConcurrentHashMapV8.BiFun<? super K,? super V,? extends U> transformer,
 ConcurrentHashMapV8.Action action)
```
 Performs the given action for each non-null transformation of each (key, value).
 
 Parameters:
 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 action
 - searchInParallel
```
public  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. Upon success, further element processing is suppressed and the results of any other parallel invocations of the search function are ignored.
 
 Parameters:
 searchFunction - a function returning a non-null result on success, else null
 
 Returns:
 a non-null result from applying the given search function on each (key, value), or null if none
 - reduceInParallel
```
public  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.
 
 Parameters:
 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 function
 
 Returns:
 the result of accumulating the given transformation of all (key, value) pairs
 - reduceToDoubleInParallel
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all (key, value) pairs
 - reduceToLongInParallel
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all (key, value) pairs
 - reduceToIntInParallel
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all (key, value) pairs
 - forEachKeyInParallel
```
public void forEachKeyInParallel(ConcurrentHashMapV8.Action<K> action)
```
 Performs the given action for each key.
 
 Parameters:
 action - the action
 - forEachKeyInParallel
```
public  void forEachKeyInParallel(ConcurrentHashMapV8.Fun<? super K,? extends U> transformer,
 ConcurrentHashMapV8.Action action)
```
 Performs the given action for each non-null transformation of each key.
 
 Parameters:
 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 action
 - searchKeysInParallel
```
public  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. Upon success, further element processing is suppressed and the results of any other parallel invocations of the search function are ignored.
 
 Parameters:
 searchFunction - a function returning a non-null result on success, else null
 
 Returns:
 a non-null result from applying the given search function on each key, or null if none
 - reduceKeysInParallel
```
public 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.
 
 Parameters:
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating all keys using the given reducer to combine values, or null if none
 - reduceKeysInParallel
```
public  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.
 
 Parameters:
 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 function
 
 Returns:
 the result of accumulating the given transformation of all keys
 - reduceKeysToDoubleInParallel
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all keys
 - reduceKeysToLongInParallel
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all keys
 - reduceKeysToIntInParallel
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all keys
 - forEachValueInParallel
```
public void forEachValueInParallel(ConcurrentHashMapV8.Action<V> action)
```
 Performs the given action for each value.
 
 Parameters:
 action - the action
 - forEachValueInParallel
```
public  void forEachValueInParallel(ConcurrentHashMapV8.Fun<? super V,? extends U> transformer,
 ConcurrentHashMapV8.Action action)
```
 Performs the given action for each non-null transformation of each value.
 
 Parameters:
 transformer - a function returning the transformation for an element, or null if there is no transformation (in which case the action is not applied)
 - searchValuesInParallel
```
public  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. Upon success, further element processing is suppressed and the results of any other parallel invocations of the search function are ignored.
 
 Parameters:
 searchFunction - a function returning a non-null result on success, else null
 
 Returns:
 a non-null result from applying the given search function on each value, or null if none
 - reduceValuesInParallel
```
public 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.
 
 Parameters:
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating all values
 - reduceValuesInParallel
```
public  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.
 
 Parameters:
 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 function
 
 Returns:
 the result of accumulating the given transformation of all values
 - reduceValuesToDoubleInParallel
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all values
 - reduceValuesToLongInParallel
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all values
 - reduceValuesToIntInParallel
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all values
 - forEachEntryInParallel
```
public void forEachEntryInParallel(ConcurrentHashMapV8.Action<Map.Entry<K,V>> action)
```
 Performs the given action for each entry.
 
 Parameters:
 action - the action
 - forEachEntryInParallel
```
public  void forEachEntryInParallel(ConcurrentHashMapV8.Fun<Map.Entry<K,V>,? extends U> transformer,
 ConcurrentHashMapV8.Action action)
```
 Performs the given action for each non-null transformation of each entry.
 
 Parameters:
 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 action
 - searchEntriesInParallel
```
public  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. Upon success, further element processing is suppressed and the results of any other parallel invocations of the search function are ignored.
 
 Parameters:
 searchFunction - a function returning a non-null result on success, else null
 
 Returns:
 a non-null result from applying the given search function on each entry, or null if none
 - reduceEntriesInParallel
```
public 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.
 
 Parameters:
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating all entries
 - reduceEntriesInParallel
```
public  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.
 
 Parameters:
 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 function
 
 Returns:
 the result of accumulating the given transformation of all entries
 - reduceEntriesToDoubleInParallel
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all entries
 - reduceEntriesToLongInParallel
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all entries
 - reduceEntriesToIntInParallel
```
public 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.
 
 Parameters:
 transformer - a function returning the transformation for an element
 basis - the identity (initial default value) for the reduction
 reducer - a commutative associative combining function
 
 Returns:
 the result of accumulating the given transformation of all entries

Class ConcurrentHashMapV8<K,V>

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ConcurrentHashMapV8

ConcurrentHashMapV8

ConcurrentHashMapV8

ConcurrentHashMapV8

ConcurrentHashMapV8

Method Detail

newKeySet

newKeySet

isEmpty

size

mappingCount

get

getValueOrDefault

containsKey

containsValue

contains

put

putIfAbsent

putAll

computeIfAbsent

computeIfPresent

compute

merge

remove

remove

replace

replace

clear

keySet

keySet

values

entrySet

keys

elements

keySpliterator

valueSpliterator

entrySpliterator

hashCode

toString

equals

forEachSequentially

forEachSequentially

searchSequentially

reduceSequentially

reduceToDoubleSequentially

reduceToLongSequentially

reduceToIntSequentially

forEachKeySequentially

forEachKeySequentially

searchKeysSequentially

reduceKeysSequentially

reduceKeysSequentially

reduceKeysToDoubleSequentially

reduceKeysToLongSequentially

reduceKeysToIntSequentially

forEachValueSequentially

forEachValueSequentially

searchValuesSequentially

reduceValuesSequentially

reduceValuesSequentially

reduceValuesToDoubleSequentially

reduceValuesToLongSequentially

reduceValuesToIntSequentially

forEachEntrySequentially

forEachEntrySequentially

searchEntriesSequentially

reduceEntriesSequentially

reduceEntriesSequentially

reduceEntriesToDoubleSequentially

reduceEntriesToLongSequentially

reduceEntriesToIntSequentially

forEachInParallel

forEachInParallel