org.apache.mina.util

类 CopyOnWriteMap<K,V>

java.lang.Object

org.apache.mina.util.CopyOnWriteMap<K,V>

所有已实现的接口:

java.lang.Cloneable, java.util.Map<K,V>

public class CopyOnWriteMap<K,V>
extends java.lang.Object
implements java.util.Map<K,V>, java.lang.Cloneable

A thread-safe version of Map in which all operations that change the Map are implemented by making a new copy of the underlying Map. While the creation of a new Map can be expensive, this class is designed for cases in which the primary function is to read data from the Map, not to modify the Map. Therefore the operations that do not cause a change to this class happen quickly and concurrently.

作者:

Apache MINA Project

嵌套类概要

从接口继承的嵌套类/接口 java.util.Map

java.util.Map.Entry<K,V>

构造器概要

构造器

构造器和说明
CopyOnWriteMap() Creates a new instance of CopyOnWriteMap.
CopyOnWriteMap(int initialCapacity) Creates a new instance of CopyOnWriteMap with the specified initial size
CopyOnWriteMap(java.util.Map<K,V> data) Creates a new instance of CopyOnWriteMap in which the initial data being held by this map is contained in the supplied map.

方法概要

方法

限定符和类型	方法和说明
void	clear() Removes all entries in this map.
java.lang.Object	clone()
boolean	containsKey(java.lang.Object key)
boolean	containsValue(java.lang.Object value)
java.util.Set<java.util.Map.Entry<K,V>>	entrySet() This method will return a read-only Set.
V	get(java.lang.Object key)
boolean	isEmpty()
java.util.Set<K>	keySet() This method will return a read-only Set.
V	put(K key, V value) Adds the provided key and value to this map.
void	putAll(java.util.Map<? extends K,? extends V> newData) Inserts all the keys and values contained in the provided map to this map.
V	remove(java.lang.Object key) Removed the value and key from this map based on the provided key.
int	size()
java.util.Collection<V>	values() This method will return a read-only Collection.

从类继承的方法 java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 java.util.Map

equals, hashCode

构造器详细资料

CopyOnWriteMap

public CopyOnWriteMap()

Creates a new instance of CopyOnWriteMap.

CopyOnWriteMap

public CopyOnWriteMap(int initialCapacity)

Creates a new instance of CopyOnWriteMap with the specified initial size

参数:

initialCapacity - The initial size of the Map.

CopyOnWriteMap

public CopyOnWriteMap(java.util.Map<K,V> data)

Creates a new instance of CopyOnWriteMap in which the initial data being held by this map is contained in the supplied map.

参数:

data - A Map containing the initial contents to be placed into this class.

方法详细资料

put

public V put(K key,
    V value)

Adds the provided key and value to this map.

指定者:

put 在接口中 java.util.Map<K,V>

另请参阅:

Map.put(java.lang.Object, java.lang.Object)

remove

public V remove(java.lang.Object key)

Removed the value and key from this map based on the provided key.

指定者:

remove 在接口中 java.util.Map<K,V>

另请参阅:

Map.remove(java.lang.Object)

putAll

public void putAll(java.util.Map<? extends K,? extends V> newData)

Inserts all the keys and values contained in the provided map to this map.

指定者:

putAll 在接口中 java.util.Map<K,V>

另请参阅:

Map.putAll(java.util.Map)

clear

public void clear()

Removes all entries in this map.

指定者:

clear 在接口中 java.util.Map<K,V>

另请参阅:

Map.clear()

size

public int size()

指定者:

size 在接口中 java.util.Map<K,V>

返回:

the number of key/value pairs in this map.

另请参阅:

Map.size()

isEmpty

public boolean isEmpty()

指定者:

isEmpty 在接口中 java.util.Map<K,V>

返回:

true if this map is empty, otherwise false.

另请参阅:

Map.isEmpty()

containsKey

public boolean containsKey(java.lang.Object key)

指定者:

containsKey 在接口中 java.util.Map<K,V>

返回:

true if this map contains the provided key, otherwise this method return false.

另请参阅:

Map.containsKey(java.lang.Object)

containsValue

public boolean containsValue(java.lang.Object value)

指定者:

containsValue 在接口中 java.util.Map<K,V>

返回:

true if this map contains the provided value, otherwise this method returns false.

另请参阅:

Map.containsValue(java.lang.Object)

get

public V get(java.lang.Object key)

指定者:

get 在接口中 java.util.Map<K,V>

返回:

the value associated with the provided key from this map.

另请参阅:

Map.get(java.lang.Object)

keySet

public java.util.Set<K> keySet()

This method will return a read-only Set.

指定者:

keySet 在接口中 java.util.Map<K,V>

values

public java.util.Collection<V> values()

This method will return a read-only Collection.

指定者:

values 在接口中 java.util.Map<K,V>

entrySet

public java.util.Set<java.util.Map.Entry<K,V>> entrySet()

This method will return a read-only Set.

指定者:

entrySet 在接口中 java.util.Map<K,V>

clone

public java.lang.Object clone()

覆盖:

clone 在类中 java.lang.Object