AbstractMap (Java Platform SE 7 ) (original) (raw)

java.lang.Object
- java.util.AbstractMap<K,V>
Type Parameters:
K - the type of keys maintained by this map
V - the type of mapped values
All Implemented Interfaces:
Map<K,V>
Direct Known Subclasses:
ConcurrentHashMap, ConcurrentSkipListMap, EnumMap, HashMap, IdentityHashMap, TreeMap, WeakHashMap

public abstract class AbstractMap<K,V>
extends Object
implements Map<K,V>
This class provides a skeletal implementation of the
Map
interface, to minimize the effort required to implement this interface.
To implement an unmodifiable map, the programmer needs only to extend this class and provide an implementation for the entrySet method, which returns a set-view of the map's mappings. Typically, the returned set will, in turn, be implemented atop AbstractSet. This set should not support the add or remove methods, and its iterator should not support the remove method.
To implement a modifiable map, the programmer must additionally override this class's put method (which otherwise throws anUnsupportedOperationException), and the iterator returned byentrySet().iterator() must additionally implement itsremove method.
The programmer should generally provide a void (no argument) and map constructor, as per the recommendation in the Map interface specification.
The documentation for each non-abstract method in this class describes its implementation in detail. Each of these methods may be overridden if the map being implemented admits a more efficient implementation.
This class is a member of the Java Collections Framework.
Since:
1.2
See Also:
Map, Collection

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AbstractMap.SimpleEntry<K,V> An Entry maintaining a key and a value.
static class	AbstractMap.SimpleImmutableEntry<K,V> An Entry maintaining an immutable key and value.

   * ### Nested classes/interfaces inherited from interface java.util.[Map](../../java/util/Map.html "interface in java.util")  
   `[Map.Entry](../../java/util/Map.Entry.html "interface in java.util")<[K](../../java/util/Map.Entry.html "type parameter in Map.Entry"),[V](../../java/util/Map.Entry.html "type parameter in Map.Entry")>`

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractMap() Sole constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	clear() Removes all of the mappings from this map (optional operation).
protected Object	clone() Returns a shallow copy of this AbstractMap instance: the keys and values themselves are not cloned.
boolean	containsKey(Object key) Returns true if this map contains a mapping for the specified key.
boolean	containsValue(Object value) Returns true if this map maps one or more keys to the specified value.
abstract Set<Map.Entry<K,V>>	entrySet() Returns a Set view of the mappings contained in this map.
boolean	equals(Object o) Compares the specified object with this map for equality.
V	get(Object key) Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.
int	hashCode() Returns the hash code value for this map.
boolean	isEmpty() Returns true if this map contains no key-value mappings.
Set<K>	keySet() Returns a Set view of the keys contained in this map.
V	put(K key,V value) Associates the specified value with the specified key in this map (optional operation).
void	putAll(Map<? extends K,? extends V> m) Copies all of the mappings from the specified map to this map (optional operation).
V	remove(Object key) Removes the mapping for a key from this map if it is present (optional operation).
int	size() Returns the number of key-value mappings in this map.
String	toString() Returns a string representation of this map.
Collection<V>	values() Returns a Collection view of the values contained in this map.

   * ### Methods inherited from class java.lang.[Object](../../java/lang/Object.html "class in java.lang")  
   `[finalize](../../java/lang/Object.html#finalize%28%29), [getClass](../../java/lang/Object.html#getClass%28%29), [notify](../../java/lang/Object.html#notify%28%29), [notifyAll](../../java/lang/Object.html#notifyAll%28%29), [wait](../../java/lang/Object.html#wait%28%29), [wait](../../java/lang/Object.html#wait%28long%29), [wait](../../java/lang/Object.html#wait%28long,%20int%29)`

Constructor Detail

 * #### AbstractMap  
 protected AbstractMap()  
 Sole constructor. (For invocation by subclass constructors, typically implicit.)

Method Detail

* #### size  
public int size()  
Returns the number of key-value mappings in this map. If the map contains more than  
Integer.MAX\_VALUE  
 elements, returns  
Integer.MAX\_VALUE  
.  
This implementation returns entrySet().size().  
**Specified by:**  
`[size](../../java/util/Map.html#size%28%29)` in interface `[Map](../../java/util/Map.html "interface in java.util")<[K](../../java/util/AbstractMap.html "type parameter in AbstractMap"),[V](../../java/util/AbstractMap.html "type parameter in AbstractMap")>`  
Returns:  
the number of key-value mappings in this map  
* #### isEmpty  
public boolean isEmpty()  
Returns  
true  
 if this map contains no key-value mappings.  
This implementation returns size() == 0.  
**Specified by:**  
`[isEmpty](../../java/util/Map.html#isEmpty%28%29)` in interface `[Map](../../java/util/Map.html "interface in java.util")<[K](../../java/util/AbstractMap.html "type parameter in AbstractMap"),[V](../../java/util/AbstractMap.html "type parameter in AbstractMap")>`  
Returns:  
true if this map contains no key-value mappings  
* #### containsValue  
public boolean containsValue([Object](../../java/lang/Object.html "class in java.lang") value)  
Returns  
true  
 if this map maps one or more keys to the specified value. More formally, returns  
true  
 if and only if this map contains at least one mapping to a value  
v  
 such that  
(value==null ? v==null : value.equals(v))  
. This operation will probably require time linear in the map size for most implementations of the  
Map  
 interface.  
This implementation iterates over entrySet() searching for an entry with the specified value. If such an entry is found,true is returned. If the iteration terminates without finding such an entry, false is returned. Note that this implementation requires linear time in the size of the map.  
**Specified by:**  
`[containsValue](../../java/util/Map.html#containsValue%28java.lang.Object%29)` in interface `[Map](../../java/util/Map.html "interface in java.util")<[K](../../java/util/AbstractMap.html "type parameter in AbstractMap"),[V](../../java/util/AbstractMap.html "type parameter in AbstractMap")>`  
Parameters:  
`value` \- value whose presence in this map is to be tested  
Returns:  
true if this map maps one or more keys to the specified value  
Throws:  
`[ClassCastException](../../java/lang/ClassCastException.html "class in java.lang")` \- if the value is of an inappropriate type for this map ([optional](Collection.html#optional-restrictions))  
`[NullPointerException](../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified value is null and this map does not permit null values ([optional](Collection.html#optional-restrictions))  
* #### containsKey  
public boolean containsKey([Object](../../java/lang/Object.html "class in java.lang") key)  
Returns  
true  
 if this map contains a mapping for the specified key. More formally, returns  
true  
 if and only if this map contains a mapping for a key  
k  
 such that  
(key==null ? k==null : key.equals(k))  
. (There can be at most one such mapping.)  
This implementation iterates over entrySet() searching for an entry with the specified key. If such an entry is found,true is returned. If the iteration terminates without finding such an entry, false is returned. Note that this implementation requires linear time in the size of the map; many implementations will override this method.  
**Specified by:**  
`[containsKey](../../java/util/Map.html#containsKey%28java.lang.Object%29)` in interface `[Map](../../java/util/Map.html "interface in java.util")<[K](../../java/util/AbstractMap.html "type parameter in AbstractMap"),[V](../../java/util/AbstractMap.html "type parameter in AbstractMap")>`  
Parameters:  
`key` \- key whose presence in this map is to be tested  
Returns:  
true if this map contains a mapping for the specified key  
Throws:  
`[ClassCastException](../../java/lang/ClassCastException.html "class in java.lang")` \- if the key is of an inappropriate type for this map ([optional](Collection.html#optional-restrictions))  
`[NullPointerException](../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified key is null and this map does not permit null keys ([optional](Collection.html#optional-restrictions))  
* #### get  
public [V](../../java/util/AbstractMap.html "type parameter in AbstractMap") get([Object](../../java/lang/Object.html "class in java.lang") key)  
Returns the value to which the specified key is mapped, or `null` if this map contains no mapping for the key.  
More formally, if this map contains a mapping from a key`k` to a value `v` such that `(key==null ? k==null : key.equals(k))`, then this method returns `v`; otherwise it returns `null`. (There can be at most one such mapping.)  
If this map permits null values, then a return value of`null` does not _necessarily_ indicate that the map contains no mapping for the key; it's also possible that the map explicitly maps the key to `null`. The [containsKey](../../java/util/Map.html#containsKey%28java.lang.Object%29) operation may be used to distinguish these two cases.  
This implementation iterates over entrySet() searching for an entry with the specified key. If such an entry is found, the entry's value is returned. If the iteration terminates without finding such an entry, null is returned. Note that this implementation requires linear time in the size of the map; many implementations will override this method.  
**Specified by:**  
`[get](../../java/util/Map.html#get%28java.lang.Object%29)` in interface `[Map](../../java/util/Map.html "interface in java.util")<[K](../../java/util/AbstractMap.html "type parameter in AbstractMap"),[V](../../java/util/AbstractMap.html "type parameter in AbstractMap")>`  
Parameters:  
`key` \- the key whose associated value is to be returned  
Returns:  
the value to which the specified key is mapped, or`null` if this map contains no mapping for the key  
Throws:  
`[ClassCastException](../../java/lang/ClassCastException.html "class in java.lang")` \- if the key is of an inappropriate type for this map ([optional](Collection.html#optional-restrictions))  
`[NullPointerException](../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified key is null and this map does not permit null keys ([optional](Collection.html#optional-restrictions))  
* #### put  
public [V](../../java/util/AbstractMap.html "type parameter in AbstractMap") put([K](../../java/util/AbstractMap.html "type parameter in AbstractMap") key,  
    [V](../../java/util/AbstractMap.html "type parameter in AbstractMap") value)  
Associates the specified value with the specified key in this map (optional operation). If the map previously contained a mapping for the key, the old value is replaced by the specified value. (A map  
m  
 is said to contain a mapping for a key  
k  
 if and only if [m.containsKey(k)](../../java/util/Map.html#containsKey%28java.lang.Object%29) would return  
true  
.)  
This implementation always throws anUnsupportedOperationException.  
**Specified by:**  
`[put](../../java/util/Map.html#put%28K,%20V%29)` in interface `[Map](../../java/util/Map.html "interface in java.util")<[K](../../java/util/AbstractMap.html "type parameter in AbstractMap"),[V](../../java/util/AbstractMap.html "type parameter in AbstractMap")>`  
Parameters:  
`key` \- key with which the specified value is to be associated  
`value` \- value to be associated with the specified key  
Returns:  
the previous value associated with key, ornull if there was no mapping for key. (A null return can also indicate that the map previously associated null with key, if the implementation supports null values.)  
Throws:  
`[UnsupportedOperationException](../../java/lang/UnsupportedOperationException.html "class in java.lang")` \- if the put operation is not supported by this map  
`[ClassCastException](../../java/lang/ClassCastException.html "class in java.lang")` \- if the class of the specified key or value prevents it from being stored in this map  
`[NullPointerException](../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified key or value is null and this map does not permit null keys or values  
`[IllegalArgumentException](../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if some property of the specified key or value prevents it from being stored in this map  
* #### remove  
public [V](../../java/util/AbstractMap.html "type parameter in AbstractMap") remove([Object](../../java/lang/Object.html "class in java.lang") key)  
Removes the mapping for a key from this map if it is present (optional operation). More formally, if this map contains a mapping from key  
k  
 to value  
v  
 such that`(key==null ? k==null : key.equals(k))`, that mapping is removed. (The map can contain at most one such mapping.)  
Returns the value to which this map previously associated the key, or null if the map contained no mapping for the key.  
If this map permits null values, then a return value ofnull does not _necessarily_ indicate that the map contained no mapping for the key; it's also possible that the map explicitly mapped the key to null.  
The map will not contain a mapping for the specified key once the call returns.  
This implementation iterates over entrySet() searching for an entry with the specified key. If such an entry is found, its value is obtained with its getValue operation, the entry is removed from the collection (and the backing map) with the iterator'sremove operation, and the saved value is returned. If the iteration terminates without finding such an entry, null is returned. Note that this implementation requires linear time in the size of the map; many implementations will override this method.  
Note that this implementation throws anUnsupportedOperationException if the entrySet iterator does not support the remove method and this map contains a mapping for the specified key.  
**Specified by:**  
`[remove](../../java/util/Map.html#remove%28java.lang.Object%29)` in interface `[Map](../../java/util/Map.html "interface in java.util")<[K](../../java/util/AbstractMap.html "type parameter in AbstractMap"),[V](../../java/util/AbstractMap.html "type parameter in AbstractMap")>`  
Parameters:  
`key` \- key whose mapping is to be removed from the map  
Returns:  
the previous value associated with key, ornull if there was no mapping for key.  
Throws:  
`[UnsupportedOperationException](../../java/lang/UnsupportedOperationException.html "class in java.lang")` \- if the remove operation is not supported by this map  
`[ClassCastException](../../java/lang/ClassCastException.html "class in java.lang")` \- if the key is of an inappropriate type for this map ([optional](Collection.html#optional-restrictions))  
`[NullPointerException](../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified key is null and this map does not permit null keys ([optional](Collection.html#optional-restrictions))  
* #### putAll  
public void putAll([Map](../../java/util/Map.html "interface in java.util")<? extends [K](../../java/util/AbstractMap.html "type parameter in AbstractMap"),? extends [V](../../java/util/AbstractMap.html "type parameter in AbstractMap")> m)  
Copies all of the mappings from the specified map to this map (optional operation). The effect of this call is equivalent to that of calling [put(k, v)](../../java/util/Map.html#put%28K,%20V%29) on this map once for each mapping from key  
k  
 to value  
v  
 in the specified map. The behavior of this operation is undefined if the specified map is modified while the operation is in progress.  
This implementation iterates over the specified map'sentrySet() collection, and calls this map's put operation once for each entry returned by the iteration.  
Note that this implementation throws anUnsupportedOperationException if this map does not support the put operation and the specified map is nonempty.  
**Specified by:**  
`[putAll](../../java/util/Map.html#putAll%28java.util.Map%29)` in interface `[Map](../../java/util/Map.html "interface in java.util")<[K](../../java/util/AbstractMap.html "type parameter in AbstractMap"),[V](../../java/util/AbstractMap.html "type parameter in AbstractMap")>`  
Parameters:  
`m` \- mappings to be stored in this map  
Throws:  
`[UnsupportedOperationException](../../java/lang/UnsupportedOperationException.html "class in java.lang")` \- if the putAll operation is not supported by this map  
`[ClassCastException](../../java/lang/ClassCastException.html "class in java.lang")` \- if the class of a key or value in the specified map prevents it from being stored in this map  
`[NullPointerException](../../java/lang/NullPointerException.html "class in java.lang")` \- if the specified map is null, or if this map does not permit null keys or values, and the specified map contains null keys or values  
`[IllegalArgumentException](../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if some property of a key or value in the specified map prevents it from being stored in this map  
* #### clear  
public void clear()  
Removes all of the mappings from this map (optional operation). The map will be empty after this call returns.  
This implementation calls entrySet().clear().  
Note that this implementation throws anUnsupportedOperationException if the entrySet does not support the clear operation.  
**Specified by:**  
`[clear](../../java/util/Map.html#clear%28%29)` in interface `[Map](../../java/util/Map.html "interface in java.util")<[K](../../java/util/AbstractMap.html "type parameter in AbstractMap"),[V](../../java/util/AbstractMap.html "type parameter in AbstractMap")>`  
Throws:  
`[UnsupportedOperationException](../../java/lang/UnsupportedOperationException.html "class in java.lang")` \- if the clear operation is not supported by this map  
* #### keySet  
public [Set](../../java/util/Set.html "interface in java.util")<[K](../../java/util/AbstractMap.html "type parameter in AbstractMap")> keySet()  
Returns a [Set](../../java/util/Set.html "interface in java.util") view of the keys contained in this map. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. If the map is modified while an iteration over the set is in progress (except through the iterator's own  
remove  
 operation), the results of the iteration are undefined. The set supports element removal, which removes the corresponding mapping from the map, via the  
Iterator.remove  
,  
Set.remove  
,  
removeAll  
,  
retainAll  
, and  
clear  
 operations. It does not support the  
add  
 or  
addAll  
 operations.  
This implementation returns a set that subclasses [AbstractSet](../../java/util/AbstractSet.html "class in java.util"). The subclass's iterator method returns a "wrapper object" over this map's entrySet() iterator. The size method delegates to this map's size method and thecontains method delegates to this map'scontainsKey method.  
The set is created the first time this method is called, and returned in response to all subsequent calls. No synchronization is performed, so there is a slight chance that multiple calls to this method will not all return the same set.  
**Specified by:**  
`[keySet](../../java/util/Map.html#keySet%28%29)` in interface `[Map](../../java/util/Map.html "interface in java.util")<[K](../../java/util/AbstractMap.html "type parameter in AbstractMap"),[V](../../java/util/AbstractMap.html "type parameter in AbstractMap")>`  
Returns:  
a set view of the keys contained in this map  
* #### values  
public [Collection](../../java/util/Collection.html "interface in java.util")<[V](../../java/util/AbstractMap.html "type parameter in AbstractMap")> values()  
Returns a [Collection](../../java/util/Collection.html "interface in java.util") view of the values contained in this map. The collection is backed by the map, so changes to the map are reflected in the collection, and vice-versa. If the map is modified while an iteration over the collection is in progress (except through the iterator's own  
remove  
 operation), the results of the iteration are undefined. The collection supports element removal, which removes the corresponding mapping from the map, via the  
Iterator.remove  
,  
Collection.remove  
,  
removeAll  
,  
retainAll  
 and  
clear  
 operations. It does not support the  
add  
 or  
addAll  
 operations.  
This implementation returns a collection that subclasses [AbstractCollection](../../java/util/AbstractCollection.html "class in java.util"). The subclass's iterator method returns a "wrapper object" over this map's entrySet() iterator. The size method delegates to this map's size method and the contains method delegates to this map'scontainsValue method.  
The collection is created the first time this method is called, and returned in response to all subsequent calls. No synchronization is performed, so there is a slight chance that multiple calls to this method will not all return the same collection.  
**Specified by:**  
`[values](../../java/util/Map.html#values%28%29)` in interface `[Map](../../java/util/Map.html "interface in java.util")<[K](../../java/util/AbstractMap.html "type parameter in AbstractMap"),[V](../../java/util/AbstractMap.html "type parameter in AbstractMap")>`  
Returns:  
a collection view of the values contained in this map  
* #### entrySet  
public abstract [Set](../../java/util/Set.html "interface in java.util")<[Map.Entry](../../java/util/Map.Entry.html "interface in java.util")<[K](../../java/util/AbstractMap.html "type parameter in AbstractMap"),[V](../../java/util/AbstractMap.html "type parameter in AbstractMap")>> entrySet()  
**Description copied from interface: `[Map](../../java/util/Map.html#entrySet%28%29)`**  
Returns a [Set](../../java/util/Set.html "interface in java.util") view of the mappings contained in this map. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. If the map is modified while an iteration over the set is in progress (except through the iterator's own  
remove  
 operation, or through the  
setValue  
 operation on a map entry returned by the iterator) the results of the iteration are undefined. The set supports element removal, which removes the corresponding mapping from the map, via the  
Iterator.remove  
,  
Set.remove  
,  
removeAll  
,  
retainAll  
 and  
clear  
 operations. It does not support the  
add  
 or  
addAll  
 operations.  
**Specified by:**  
`[entrySet](../../java/util/Map.html#entrySet%28%29)` in interface `[Map](../../java/util/Map.html "interface in java.util")<[K](../../java/util/AbstractMap.html "type parameter in AbstractMap"),[V](../../java/util/AbstractMap.html "type parameter in AbstractMap")>`  
Returns:  
a set view of the mappings contained in this map  
* #### equals  
public boolean equals([Object](../../java/lang/Object.html "class in java.lang") o)  
Compares the specified object with this map for equality. Returns  
true  
 if the given object is also a map and the two maps represent the same mappings. More formally, two maps  
m1  
 and  
m2  
 represent the same mappings if  
m1.entrySet().equals(m2.entrySet())  
. This ensures that the  
equals  
 method works properly across different implementations of the  
Map  
 interface.  
This implementation first checks if the specified object is this map; if so it returns true. Then, it checks if the specified object is a map whose size is identical to the size of this map; if not, it returns false. If so, it iterates over this map'sentrySet collection, and checks that the specified map contains each mapping that this map contains. If the specified map fails to contain such a mapping, false is returned. If the iteration completes, true is returned.  
**Specified by:**  
`[equals](../../java/util/Map.html#equals%28java.lang.Object%29)` in interface `[Map](../../java/util/Map.html "interface in java.util")<[K](../../java/util/AbstractMap.html "type parameter in AbstractMap"),[V](../../java/util/AbstractMap.html "type parameter in AbstractMap")>`  
**Overrides:**  
`[equals](../../java/lang/Object.html#equals%28java.lang.Object%29)` in class `[Object](../../java/lang/Object.html "class in java.lang")`  
Parameters:  
`o` \- object to be compared for equality with this map  
Returns:  
true if the specified object is equal to this map  
See Also:  
[Object.hashCode()](../../java/lang/Object.html#hashCode%28%29), [HashMap](../../java/util/HashMap.html "class in java.util")  
* #### hashCode  
public int hashCode()  
Returns the hash code value for this map. The hash code of a map is defined to be the sum of the hash codes of each entry in the map's  
entrySet()  
 view. This ensures that  
m1.equals(m2)  
 implies that  
m1.hashCode()==m2.hashCode()  
 for any two maps  
m1  
 and  
m2  
, as required by the general contract of[Object.hashCode()](../../java/lang/Object.html#hashCode%28%29).  
This implementation iterates over entrySet(), calling[hashCode()](../../java/util/Map.Entry.html#hashCode%28%29) on each element (entry) in the set, and adding up the results.  
**Specified by:**  
`[hashCode](../../java/util/Map.html#hashCode%28%29)` in interface `[Map](../../java/util/Map.html "interface in java.util")<[K](../../java/util/AbstractMap.html "type parameter in AbstractMap"),[V](../../java/util/AbstractMap.html "type parameter in AbstractMap")>`  
**Overrides:**  
`[hashCode](../../java/lang/Object.html#hashCode%28%29)` in class `[Object](../../java/lang/Object.html "class in java.lang")`  
Returns:  
the hash code value for this map  
See Also:  
[Map.Entry.hashCode()](../../java/util/Map.Entry.html#hashCode%28%29), [Object.equals(Object)](../../java/lang/Object.html#equals%28java.lang.Object%29), [Set.equals(Object)](../../java/util/Set.html#equals%28java.lang.Object%29)  
* #### toString  
public [String](../../java/lang/String.html "class in java.lang") toString()  
Returns a string representation of this map. The string representation consists of a list of key-value mappings in the order returned by the map's  
entrySet  
 view's iterator, enclosed in braces (  
"{}"  
). Adjacent mappings are separated by the characters  
", "  
 (comma and space). Each key-value mapping is rendered as the key followed by an equals sign (  
"="  
) followed by the associated value. Keys and values are converted to strings as by[String.valueOf(Object)](../../java/lang/String.html#valueOf%28java.lang.Object%29).  
**Overrides:**  
`[toString](../../java/lang/Object.html#toString%28%29)` in class `[Object](../../java/lang/Object.html "class in java.lang")`  
Returns:  
a string representation of this map  
* #### clone  
protected [Object](../../java/lang/Object.html "class in java.lang") clone()  
                throws [CloneNotSupportedException](../../java/lang/CloneNotSupportedException.html "class in java.lang")  
Returns a shallow copy of this  
AbstractMap  
 instance: the keys and values themselves are not cloned.  
**Overrides:**  
`[clone](../../java/lang/Object.html#clone%28%29)` in class `[Object](../../java/lang/Object.html "class in java.lang")`  
Returns:  
a shallow copy of this map  
Throws:  
`[CloneNotSupportedException](../../java/lang/CloneNotSupportedException.html "class in java.lang")` \- if the object's class does not support the `Cloneable` interface. Subclasses that override the `clone` method can also throw this exception to indicate that an instance cannot be cloned.  
See Also:  
[Cloneable](../../java/lang/Cloneable.html "interface in java.lang")

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AbstractMap (Java Platform SE 7 ) (original) (raw)

Nested Class Summary

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Method Summary

Constructor Detail

Method Detail