Package com.sun.jdo.spi.persistence.utility

Class WeakHashSet

java.lang.Object

java.util.AbstractCollection

java.util.AbstractSet

java.util.HashSet

com.sun.jdo.spi.persistence.utility.WeakHashSet

All Implemented Interfaces:

Serializable, Cloneable, Iterable, Collection, Set

public class WeakHashSet
extends HashSet

A weak HashSet. An element stored in the WeakHashSet might be garbage collected, if there is no strong reference to this element.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
WeakHashSet()

Method Summary

Modifier and Type	Method	Description
boolean	add(Object o)	Adds the specified element to this set if it is not already present.
boolean	contains(Object o)	Returns true if this set contains the specified element.
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.

Methods inherited from class java.util.HashSet

clear, clone, isEmpty, newHashSet, size, spliterator, toArray, toArray

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

addAll, containsAll, retainAll, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, 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

addAll, containsAll, equals, hashCode, removeAll, retainAll

Constructor Details

WeakHashSet

public WeakHashSet()

Method Details

iterator

public Iterator iterator()

Returns an iterator over the elements in this set. The elements are returned in no particular order.

Specified by:

iterator in interface Collection

Specified by:

iterator in interface Iterable

Specified by:

iterator in interface Set

Overrides:

iterator in class HashSet

Returns:

an Iterator over the elements in this set.

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 HashSet

Parameters:

o - element whose presence in this set is to be tested.

Returns:

true if this set contains the specified element.

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 HashSet

Parameters:

o - element to be added to this set.

Returns:

true if the set did not already contain the specified element.

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 HashSet

Parameters:

o - object to be removed from this set, if present.

Returns:

true if the set contained the specified element.