java.util

Class AbstractMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

Type Parameters:

K - the key type.

V - the value type.

All Implemented Interfaces:

Map<K,V>

Direct Known Subclasses:

ConcurrentHashMap, EnumMap, HashMap, IdentityHashMap, StorageMap, TreeMap

public abstract class AbstractMap<K,V>
extends Object
implements Map<K,V>

Skeletal implementation of the Map interface. [Sun docs]

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AbstractMap.SimpleEntry<K,V> A mutable Map.Entry shared by several Map implementations.
static class	AbstractMap.SimpleImmutableEntry<K,V> An immutable Map.Entry shared by several Map implementations.

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractMap()

Method Summary

Modifier and Type	Method and Description
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
boolean	equals(Object obj)
V	get(Object key)
int	hashCode()
boolean	isEmpty()
Set<K>	keySet()
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> map)
V	remove(Object key)
int	size()
String	toString()
Collection<V>	values()

Methods inherited from class java.lang.Object

finalize, getClass

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, entrySet, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll

Constructor Detail

AbstractMap

protected AbstractMap()

Method Detail

clear

public void clear()

Specified by:

clear in interface Map<K,V>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<K,V>

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

hashCode

public int hashCode()

Overrides:

hashCode in class Object

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,V>

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K,V>

put

public V put(K key,
             V value)

Specified by:

put in interface Map<K,V>

putAll

public void putAll(Map<? extends K,? extends V> map)

Specified by:

putAll in interface Map<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

size

public int size()

Specified by:

size in interface Map<K,V>

toString

public String toString()

Overrides:

toString in class Object

values

public Collection<V> values()

Specified by:

values in interface Map<K,V>