oracle.adfnmc.java.util
Class WeakHashMap

java.lang.Object
  oracle.adfnmc.java.util.AbstractMap
      oracle.adfnmc.java.util.WeakHashMap

All Implemented Interfaces:

Map

public class WeakHashMap
extends AbstractMap

Internal: Applications should not use this class.

Constructor Summary

WeakHashMap()
Constructs a new empty instance of WeakHashMap.

WeakHashMap(int capacity)
Constructs a new instance of WeakHashMap with the specified capacity.

WeakHashMap(int capacity, float loadFactor)
Constructs a new instance of WeakHashMap with the specified capacity and load factor.

WeakHashMap(Map map)

Method Summary

void	clear() Removes all elements from this Map, leaving it empty.
boolean	containsKey(java.lang.Object key) Searches this Map for the specified key.
boolean	containsValue(java.lang.Object value) Searches this Map for the specified value.
Set	entrySet() Returns a Set of Map.Entrys that represent the entries in this Map.
java.lang.Object	get(java.lang.Object key) Answers the value of the mapping with the specified key.
boolean	isEmpty() Answers if this Map has no elements, a size of zero.
java.lang.Object	put(java.lang.Object key, java.lang.Object value) Maps the specified key to the specified value.
void	putAll(Map map) Copies all the mappings in the given map to this map.
java.lang.Object	remove(java.lang.Object key) Removes a mapping with the specified key from this Map.
int	size() Answers the number of elements in this Map.

Methods inherited from class oracle.adfnmc.java.util.AbstractMap

clone, equals, hashCode, keySet, toString, values

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

WeakHashMap

public WeakHashMap()

Constructs a new empty instance of WeakHashMap.

WeakHashMap

public WeakHashMap(int capacity)

Constructs a new instance of WeakHashMap with the specified capacity.

Parameters:

capacity - the initial capacity of this WeakHashMap

Throws:

java.lang.IllegalArgumentException - when the capacity is less than zero

WeakHashMap

public WeakHashMap(int capacity,
                   float loadFactor)

Constructs a new instance of WeakHashMap with the specified capacity and load factor.

Parameters:

capacity - the initial capacity

loadFactor - the initial load factor

Throws:

java.lang.IllegalArgumentException - when the capacity is less than zero or the load factor is less or equal to zero

WeakHashMap

public WeakHashMap(Map map)

Method Detail

containsKey

public boolean containsKey(java.lang.Object key)

Description copied from class: AbstractMap

Searches this Map for the specified key.

Specified by:

containsKey in interface Map

Overrides:

containsKey in class AbstractMap

Parameters:

key - the object to search for

Returns:

true if key is a key of this Map, false otherwise

containsValue

public boolean containsValue(java.lang.Object value)

Description copied from class: AbstractMap

Searches this Map for the specified value.

Specified by:

containsValue in interface Map

Overrides:

containsValue in class AbstractMap

Parameters:

value - the object to search for

Returns:

true if value is a value of this Map, false otherwise

size

public int size()

Description copied from class: AbstractMap

Answers the number of elements in this Map.

Specified by:

size in interface Map

Overrides:

size in class AbstractMap

Returns:

the number of elements in this Map

isEmpty

public boolean isEmpty()

Description copied from class: AbstractMap

Answers if this Map has no elements, a size of zero.

Specified by:

isEmpty in interface Map

Overrides:

isEmpty in class AbstractMap

Returns:

true if this Map has no elements, false otherwise

See Also:

AbstractMap.size()

get

public java.lang.Object get(java.lang.Object key)

Description copied from class: AbstractMap

Answers the value of the mapping with the specified key.

Specified by:

get in interface Map

Overrides:

get in class AbstractMap

Parameters:

key - the key

Returns:

the value of the mapping with the specified key

put

public java.lang.Object put(java.lang.Object key,
                            java.lang.Object value)

Description copied from class: AbstractMap

Maps the specified key to the specified value.

Specified by:

put in interface Map

Overrides:

put in class AbstractMap

Parameters:

key - the key

value - the value

Returns:

the value of any previous mapping with the specified key or null if there was no mapping

remove

public java.lang.Object remove(java.lang.Object key)

Description copied from class: AbstractMap

Removes a mapping with the specified key from this Map.

Specified by:

remove in interface Map

Overrides:

remove in class AbstractMap

Parameters:

key - the key of the mapping to remove

Returns:

the value of the removed mapping or null if key is not a key in this Map

entrySet

public Set entrySet()

Description copied from class: AbstractMap

Returns a Set of Map.Entrys that represent the entries in this Map. Making changes to this Set will change the original Map and vice-versa. Entries can be removed from the Set, or their values can be changed, but new entries cannot be added to the Set.

Specified by:

entrySet in interface Map

Specified by:

entrySet in class AbstractMap

Returns:

a Set of Map.Entrys representing the entries in this Map

clear

public void clear()

Description copied from class: AbstractMap

Removes all elements from this Map, leaving it empty.

Specified by:

clear in interface Map

Overrides:

clear in class AbstractMap

See Also:

AbstractMap.isEmpty(), AbstractMap.size()

putAll

public void putAll(Map map)

Copies all the mappings in the given map to this map. These mappings will replace all mappings that this map had for any of the keys currently in the given map.

Specified by:

putAll in interface Map

Overrides:

putAll in class AbstractMap

Parameters:

map - the Map to copy mappings from

Throws:

java.lang.NullPointerException - if the given map is null