org.apache.wicket.util.collections
Class ConcurrentHashSet<E>

java.lang.Object
  java.util.AbstractCollection<E>
      java.util.AbstractSet<E>
          org.apache.wicket.util.collections.ConcurrentHashSet<E>

Type Parameters:

E -

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.lang.Iterable<E>, java.util.Collection<E>, java.util.Set<E>

public class ConcurrentHashSet<E>
extends java.util.AbstractSet<E>
implements java.util.Set<E>, java.lang.Cloneable, java.io.Serializable

This class implements the Set interface, backed by a ConcurrentHashMap instance.

Author:

Matt Tucker

See Also:

Serialized Form

Constructor Summary

ConcurrentHashSet()
Constructs a new, empty set; the backing ConcurrentHashMap instance has default initial capacity (16) and load factor (0.75).

ConcurrentHashSet(java.util.Collection<? extends E> c)
Constructs a new set containing the elements in the specified collection.

ConcurrentHashSet(int initialCapacity)
Constructs a new, empty set; the backing HashMap instance has the specified initial capacity and default load factor, which is 0.75.

ConcurrentHashSet(int initialCapacity, float loadFactor)
Constructs a new, empty set; the backing ConcurrentHashMap instance has the specified initial capacity and the specified load factor.

Method Summary

boolean	add(E o)
void	clear()
java.lang.Object	clone()
boolean	contains(java.lang.Object o)
boolean	isEmpty()
java.util.Iterator<E>	iterator()
boolean	remove(java.lang.Object o)
int	size()

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

addAll, containsAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Set

addAll, containsAll, equals, hashCode, removeAll, retainAll, toArray, toArray

Constructor Detail

ConcurrentHashSet

public ConcurrentHashSet()

Constructs a new, empty set; the backing ConcurrentHashMap instance has default initial capacity (16) and load factor (0.75).

ConcurrentHashSet

public ConcurrentHashSet(java.util.Collection<? extends E> c)

Constructs a new set containing the elements in the specified collection. The ConcurrentHashMap is created with default load factor (0.75) and an initial capacity sufficient to contain the elements in the specified collection.

Parameters:

c - the collection whose elements are to be placed into this set.

Throws:

java.lang.NullPointerException - if the specified collection is null.

ConcurrentHashSet

public ConcurrentHashSet(int initialCapacity,
                         float loadFactor)

Constructs a new, empty set; the backing ConcurrentHashMap instance has the specified initial capacity and the specified load factor.

Parameters:

initialCapacity - the initial capacity of the hash map.

loadFactor - the load factor of the hash map.

Throws:

java.lang.IllegalArgumentException - if the initial capacity is less than zero, or if the load factor is nonpositive.

ConcurrentHashSet

public ConcurrentHashSet(int initialCapacity)

Constructs a new, empty set; the backing HashMap instance has the specified initial capacity and default load factor, which is 0.75.

Parameters:

initialCapacity - the initial capacity of the hash table.

Throws:

java.lang.IllegalArgumentException - if the initial capacity is less than zero.

Method Detail

iterator

public java.util.Iterator<E> iterator()

Specified by:

iterator in interface java.lang.Iterable<E>

Specified by:

iterator in interface java.util.Collection<E>

Specified by:

iterator in interface java.util.Set<E>

Specified by:

iterator in class java.util.AbstractCollection<E>

See Also:

AbstractCollection.iterator()

size

public int size()

Specified by:

size in interface java.util.Collection<E>

Specified by:

size in interface java.util.Set<E>

Specified by:

size in class java.util.AbstractCollection<E>

See Also:

AbstractCollection.size()

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Collection<E>

Specified by:

isEmpty in interface java.util.Set<E>

Overrides:

isEmpty in class java.util.AbstractCollection<E>

See Also:

AbstractCollection.isEmpty()

contains

public boolean contains(java.lang.Object o)

Specified by:

contains in interface java.util.Collection<E>

Specified by:

contains in interface java.util.Set<E>

Overrides:

contains in class java.util.AbstractCollection<E>

See Also:

AbstractCollection.contains(java.lang.Object)

add

public boolean add(E o)

Specified by:

add in interface java.util.Collection<E>

Specified by:

add in interface java.util.Set<E>

Overrides:

add in class java.util.AbstractCollection<E>

See Also:

AbstractCollection.add(java.lang.Object)

remove

public boolean remove(java.lang.Object o)

Specified by:

remove in interface java.util.Collection<E>

Specified by:

remove in interface java.util.Set<E>

Overrides:

remove in class java.util.AbstractCollection<E>

See Also:

AbstractCollection.remove(java.lang.Object)

clear

public void clear()

Specified by:

clear in interface java.util.Collection<E>

Specified by:

clear in interface java.util.Set<E>

Overrides:

clear in class java.util.AbstractCollection<E>

See Also:

AbstractCollection.clear()

clone

public java.lang.Object clone()

Overrides:

clone in class java.lang.Object

See Also:

Object.clone()