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WeakSet (NetBeans Utilities API) - NetBeans API Javadoc 5.5.1

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org.openide.util
Class WeakSet

java.lang.Object
  java.util.AbstractCollection
      java.util.AbstractSet
          org.openide.util.WeakSet

All Implemented Interfaces:

Serializable, Cloneable, Iterable, Collection, Set

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public class WeakSet
extends AbstractSet
implements Cloneable, Serializable

Set which holds its members by using of WeakReferences. MT level: unsafe.

Note: as of JDK 6.0 (b51), you can instead use

 Set<T> s = Collections.newSetFromMap(new WeakHashMap<T, Boolean>());
 

See Also:

Serialized Form

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Constructor Summary
WeakSet()           Constructs a new set.
WeakSet(Collection c)           Constructs a new set containing the elements in the specified collection.
WeakSet(int initialCapacity)           Constructs a new, empty set;
WeakSet(int initialCapacity, float loadFactor)           Constructs a new, empty set;

 

Method Summary
boolean	add(Object o)           Adds the specified element to this set if it is not already present.
void	clear()           Removes all of the elements from this set.
Object	clone()           Returns a shallow copy of this WeakSet instance: the elements themselves are not cloned.
boolean	contains(Object o)           Returns true if this set contains the specified element.
boolean	isEmpty()           Returns true if this set contains no elements.
Iterator	iterator()           Returns an iterator over the elements in this set.
boolean	remove(Object o)           Removes the given element from this set if it is present.
int	size()
Object[]	toArray()
Object[]	toArray(Object[] array)
String	toString()

 

Methods inherited from class java.util.AbstractSet
equals, hashCode, removeAll

 

Methods inherited from class java.util.AbstractCollection
addAll, containsAll, retainAll

 

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

 

Methods inherited from interface java.util.Set
addAll, containsAll, retainAll

 

Constructor Detail

WeakSet

public WeakSet()

Constructs a new set.

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WeakSet

public WeakSet(Collection c)

Constructs a new set containing the elements in the specified collection.

Parameters:

c - a collection to add

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WeakSet

public WeakSet(int initialCapacity)

Constructs a new, empty set;

Parameters:

initialCapacity - initial capacity

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WeakSet

public WeakSet(int initialCapacity,
               float loadFactor)

Constructs a new, empty set;

Parameters:

initialCapacity - initial capacity

loadFactor - load factor

Method Detail

add

public boolean add(Object o)

Adds the specified element to this set if it is not already present.

Specified by:

add in interface Collection

Specified by:

add in interface Set

Overrides:

add in class AbstractCollection

Parameters:

o - an Object to add

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clear

public void clear()

Removes all of the elements from this set.

Specified by:

clear in interface Collection

Specified by:

clear in interface Set

Overrides:

clear in class AbstractCollection

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clone

public Object clone()

Returns a shallow copy of this WeakSet instance: the elements themselves are not cloned.

Overrides:

clone in class Object

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contains

public boolean contains(Object o)

Returns true if this set contains the specified element.

Specified by:

contains in interface Collection

Specified by:

contains in interface Set

Overrides:

contains in class AbstractCollection

Parameters:

o - an Object to examine

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isEmpty

public boolean isEmpty()

Returns true if this set contains no elements.

Specified by:

isEmpty in interface Collection

Specified by:

isEmpty in interface Set

Overrides:

isEmpty in class AbstractCollection

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iterator

public Iterator iterator()

Returns an iterator over the elements in this set.

Specified by:

iterator in interface Iterable

Specified by:

iterator in interface Collection

Specified by:

iterator in interface Set

Specified by:

iterator in class AbstractCollection

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remove

public boolean remove(Object o)

Removes the given element from this set if it is present.

Specified by:

remove in interface Collection

Specified by:

remove in interface Set

Overrides:

remove in class AbstractCollection

Parameters:

o - an Object to remove

Returns:

true if and only if the Object was successfuly removed.

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size

public int size()

Specified by:

size in interface Collection

Specified by:

size in interface Set

Specified by:

size in class AbstractCollection

Returns:

the number of elements in this set (its cardinality).

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toArray

public Object[] toArray(Object[] array)

Specified by:

toArray in interface Collection

Specified by:

toArray in interface Set

Overrides:

toArray in class AbstractCollection

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toArray

public Object[] toArray()

Specified by:

toArray in interface Collection

Specified by:

toArray in interface Set

Overrides:

toArray in class AbstractCollection

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toString

public String toString()

Overrides:

toString in class AbstractCollection

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