Package org.jppf.utils.collections

Class ConcurrentHashSet<E>

java.lang.Object

org.jppf.utils.collections.ConcurrentHashSet<E>

Type Parameters:

E - the type of objects in the set.

All Implemented Interfaces:

Iterable<E>, Collection<E>, Set<E>

public class ConcurrentHashSet<E>
extends Object
implements Set<E>

A concurrent set implementation backed by a ConcurrentHashMap.

Author:

Laurent Cohen

Constructor Summary

Constructors

Constructor	Description
ConcurrentHashSet()	Create a new, empty set with a default initial capacity of 16, a load factor of 0.75 and a concurrency level of 16.
ConcurrentHashSet(int initialCapacity)	Create a new, empty set with the specified initial capacity, a load factor of 0.75 and a concurrency level of 16
ConcurrentHashSet(int initialCapacity, float loadFactor)	Create a new, empty set with the specified initial capacity, load factor and a concurrency level of 16.
ConcurrentHashSet(int initialCapacity, float loadFactor, int concurrencyLevel)	Create a new, empty map with the specified initial capacity, load factor and concurrency level.

Method Summary

Modifier and Type	Method	Description
boolean	add(E e)
boolean	addAll(Collection<? extends E> c)
void	clear()
boolean	contains(Object o)
boolean	containsAll(Collection<?> c)
boolean	isEmpty()
Iterator<E>	iterator()
boolean	remove(Object o)
boolean	removeAll(Collection<?> c)
boolean	retainAll(Collection<?> c)
int	size()
Object[]	toArray()
<T> T[]	toArray(T[] a)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface java.util.Set

equals, hashCode, spliterator

Constructor Details

ConcurrentHashSet

public ConcurrentHashSet()

Create a new, empty set with a default initial capacity of 16, a load factor of 0.75 and a concurrency level of 16.

ConcurrentHashSet

public ConcurrentHashSet(int initialCapacity)

Create a new, empty set with the specified initial capacity, a load factor of 0.75 and a concurrency level of 16

Parameters:

initialCapacity - the initial capacity.

ConcurrentHashSet

public ConcurrentHashSet(int initialCapacity,
 float loadFactor)

Create a new, empty set with the specified initial capacity, load factor and a concurrency level of 16.

Parameters:

initialCapacity - the initial capacity.

loadFactor - the load factor threshold, used to control resizing.

ConcurrentHashSet

public ConcurrentHashSet(int initialCapacity,
 float loadFactor,
 int concurrencyLevel)

Create a new, empty map with the specified initial capacity, load factor and concurrency level.

Parameters:

initialCapacity - the initial capacity.

loadFactor - the load factor threshold, used to control resizing.

concurrencyLevel - the estimated number of concurrently updating threads.

Method Details

size

public int size()

Specified by:

size in interface Collection<E>

Specified by:

size in interface Set<E>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<E>

Specified by:

isEmpty in interface Set<E>

contains

public boolean contains(Object o)

Specified by:

contains in interface Collection<E>

Specified by:

contains in interface Set<E>

iterator

public Iterator<E> iterator()

Specified by:

iterator in interface Collection<E>

Specified by:

iterator in interface Iterable<E>

Specified by:

iterator in interface Set<E>

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection<E>

Specified by:

toArray in interface Set<E>

toArray

public <T> T[] toArray(T[] a)

Specified by:

toArray in interface Collection<E>

Specified by:

toArray in interface Set<E>

add

public boolean add(E e)

Specified by:

add in interface Collection<E>

Specified by:

add in interface Set<E>

remove

public boolean remove(Object o)

Specified by:

remove in interface Collection<E>

Specified by:

remove in interface Set<E>

containsAll

public boolean containsAll(Collection<?> c)

Specified by:

containsAll in interface Collection<E>

Specified by:

containsAll in interface Set<E>

addAll

public boolean addAll(Collection<? extends E> c)

Specified by:

addAll in interface Collection<E>

Specified by:

addAll in interface Set<E>

retainAll

public boolean retainAll(Collection<?> c)

Specified by:

retainAll in interface Collection<E>

Specified by:

retainAll in interface Set<E>

removeAll

public boolean removeAll(Collection<?> c)

Specified by:

removeAll in interface Collection<E>

Specified by:

removeAll in interface Set<E>

clear

public void clear()

Specified by:

clear in interface Collection<E>

Specified by:

clear in interface Set<E>