edu.emory.mathcs.util.collections
Class WeakValueHashMap
java.lang.Object
java.util.AbstractMap
edu.emory.mathcs.util.collections.WeakValueMap
edu.emory.mathcs.util.collections.WeakValueHashMap
- All Implemented Interfaces:
- java.util.Map
- Direct Known Subclasses:
- VolatileHashMap
- public class WeakValueHashMap
- extends edu.emory.mathcs.util.collections.WeakValueMap
Hash map that refers to values via weak references, thus not
keeping them from garbage collection. After a value becomes unreferenced
and collected, all the corresponding map entries are removed. (The cleanup
is not asynchronous but piggybacks on other map operations). This class
is a companion to WeakHashMap
.
- Version:
- 1.0
- Author:
- Dawid Kurzyniec
Nested classes inherited from class java.util.Map |
java.util.Map.Entry |
Constructor Summary |
WeakValueHashMap()
Creates new WeakValueHashMap with a default initial capacity and a
default load factor. |
WeakValueHashMap(int initialCapacity)
Creates new WeakValueHashMap with specified initial capacity and a
default load factor. |
WeakValueHashMap(int initialCapacity,
float loadFactor)
Creates new WeakValueHashMap with specified initial capacity and load
factor. |
WeakValueHashMap(java.util.Map t)
Creates new WeakValueHashMap with specified initial capacity and a
default load factor, and copies to it all the mappings from the
specified map. |
Method Summary |
void |
clear()
|
boolean |
containsKey(java.lang.Object key)
|
boolean |
containsValue(java.lang.Object value)
|
java.util.Set |
entrySet()
|
java.lang.Object |
get(java.lang.Object key)
|
boolean |
isEmpty()
|
java.lang.Object |
put(java.lang.Object key,
java.lang.Object value)
|
void |
putAll(java.util.Map t)
|
java.lang.Object |
remove(java.lang.Object key)
|
int |
size()
|
Methods inherited from class java.util.AbstractMap |
clone, equals, hashCode, keySet, toString, values |
Methods inherited from class java.lang.Object |
finalize, getClass, notify, notifyAll, wait, wait, wait |
Methods inherited from interface java.util.Map |
equals, hashCode, keySet, values |
WeakValueHashMap
public WeakValueHashMap(int initialCapacity,
float loadFactor)
- Creates new WeakValueHashMap with specified initial capacity and load
factor.
- See Also:
java.util.HashMap(int,float)
WeakValueHashMap
public WeakValueHashMap(int initialCapacity)
- Creates new WeakValueHashMap with specified initial capacity and a
default load factor.
- See Also:
java.util.HashMap(int)
WeakValueHashMap
public WeakValueHashMap()
- Creates new WeakValueHashMap with a default initial capacity and a
default load factor.
- See Also:
java.util.HashMap(int)
WeakValueHashMap
public WeakValueHashMap(java.util.Map t)
- Creates new WeakValueHashMap with specified initial capacity and a
default load factor, and copies to it all the mappings from the
specified map.
- See Also:
java.util.HashMap(int)
size
public int size()
- Specified by:
size
in interface java.util.Map
clear
public void clear()
- Specified by:
clear
in interface java.util.Map
isEmpty
public boolean isEmpty()
- Specified by:
isEmpty
in interface java.util.Map
containsKey
public boolean containsKey(java.lang.Object key)
- Specified by:
containsKey
in interface java.util.Map
containsValue
public boolean containsValue(java.lang.Object value)
- Specified by:
containsValue
in interface java.util.Map
putAll
public void putAll(java.util.Map t)
- Specified by:
putAll
in interface java.util.Map
entrySet
public java.util.Set entrySet()
- Specified by:
entrySet
in interface java.util.Map
get
public java.lang.Object get(java.lang.Object key)
- Specified by:
get
in interface java.util.Map
remove
public java.lang.Object remove(java.lang.Object key)
- Specified by:
remove
in interface java.util.Map
put
public java.lang.Object put(java.lang.Object key,
java.lang.Object value)
- Specified by:
put
in interface java.util.Map