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java.lang.Objectjava.util.AbstractCollection<E>
java.util.AbstractSet<E>
org.jboss.util.collection.ConcurrentSet<E>
E
- the element typepublic class ConcurrentSet<E>
ConcurrentSet based on top of ConcurrenthashMap. It's serializable if the elements are serializable.
Constructor Summary | |
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ConcurrentSet()
Constructs a new, empty set; the backing ConcurrentHashMap instance has default initial capacity (16) and load factor (0.75). |
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ConcurrentSet(Collection<? extends E> c)
Constructs a new set containing the elements in the specified collection. |
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ConcurrentSet(int initialCapacity)
Constructs a new, empty set; the backing ConcurrentHashMap instance has the specified initial capacity and default load factor, which is 0.75. |
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ConcurrentSet(int initialCapacity,
float loadFactor,
int concurrencyLevel)
Constructs a new, empty set; the backing ConcurrentHashMap instance has the specified initial capacity and the specified load factor. |
Method Summary | |
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boolean |
add(E o)
Adds the specified element to this set if it is not already present. |
void |
clear()
Removes all of the elements from this set. |
boolean |
contains(Object o)
Returns true if this set contains the specified element. |
boolean |
isEmpty()
Returns true if this set contains no elements. |
Iterator<E> |
iterator()
Returns an iterator over the elements in this set. |
boolean |
remove(Object o)
Removes the specified element from this set if it is present. |
int |
size()
Returns the number of elements in this set (its cardinality). |
String |
toString()
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Methods inherited from class java.util.AbstractSet |
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equals, hashCode, removeAll |
Methods inherited from class java.util.AbstractCollection |
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addAll, containsAll, retainAll, toArray, toArray |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Methods inherited from interface java.util.Set |
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addAll, containsAll, retainAll, toArray, toArray |
Constructor Detail |
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public ConcurrentSet()
public ConcurrentSet(Collection<? extends E> c)
c
- the collection whose elements are to be placed into this set.
NullPointerException
- if the specified collection is null.public ConcurrentSet(int initialCapacity, float loadFactor, int concurrencyLevel)
initialCapacity
- the initial capacity. The implementation
performs internal sizing to accommodate this many elements.loadFactor
- the load factor threshold, used to control resizing.
Resizing may be performed when the average number of elements per
bin exceeds this threshold.concurrencyLevel
- the estimated number of concurrently
updating threads. The implementation performs internal sizing
to try to accommodate this many threads.
IllegalArgumentException
- if the initial capacity is less
than zero, or if the load factor is nonpositive.public ConcurrentSet(int initialCapacity)
initialCapacity
- the initial capacity of the hash table.
IllegalArgumentException
- if the initial capacity is less
than zero.Method Detail |
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public Iterator<E> iterator()
iterator
in interface Iterable<E>
iterator
in interface Collection<E>
iterator
in interface Set<E>
iterator
in class AbstractCollection<E>
ConcurrentModificationException
public int size()
size
in interface Collection<E>
size
in interface Set<E>
size
in class AbstractCollection<E>
public boolean isEmpty()
isEmpty
in interface Collection<E>
isEmpty
in interface Set<E>
isEmpty
in class AbstractCollection<E>
public boolean contains(Object o)
contains
in interface Collection<E>
contains
in interface Set<E>
contains
in class AbstractCollection<E>
o
- element whose presence in this set is to be tested.
public boolean add(E o)
add
in interface Collection<E>
add
in interface Set<E>
add
in class AbstractCollection<E>
o
- element to be added to this set.
public boolean remove(Object o)
remove
in interface Collection<E>
remove
in interface Set<E>
remove
in class AbstractCollection<E>
o
- object to be removed from this set, if present.
public void clear()
clear
in interface Collection<E>
clear
in interface Set<E>
clear
in class AbstractCollection<E>
public String toString()
toString
in class AbstractCollection<E>
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