org.ttzero.excel.reader

类 FixSizeLRUCache<K,V>

java.lang.Object

org.ttzero.excel.reader.FixSizeLRUCache<K,V>

所有已实现的接口:

Iterable<Cache.Entry<K,V>>, Cache<K,V>

public class FixSizeLRUCache<K,V>
extends Object
implements Cache<K,V>

Implemented by the LRU page elimination algorithm. The time complexity of the push, get, and remove is O(1).

作者:

guanquan.wang at 2018-10-31 16:06

嵌套类概要

嵌套类

限定符和类型	类和说明
protected static class	FixSizeLRUCache.E<K,V>

从接口继承的嵌套类/接口 org.ttzero.excel.reader.Cache

Cache.Entry<K,V>

方法概要

限定符和类型	方法和说明
void	clear() Removes all the mappings from this cache (optional operation).
static <K,V> FixSizeLRUCache<K,V>	create()
static <K,V> FixSizeLRUCache<K,V>	create(int size)
void	forEach(Consumer<? super Cache.Entry<K,V>> action) Performs the given action for each element of the Iterable until all elements have been processed or the action throws an exception.
V	get(K k) Returns the value to which the specified key is mapped, or null if this cache contains no mapping for the key.
Iterator<Cache.Entry<K,V>>	iterator() Returns an iterator over elements of type Cache.Entry<K, V>.
void	put(K k, V v) Associates the specified value with the specified key in this cache.
protected FixSizeLRUCache.E<K,V>	remove() Remove the last item
V	remove(K k) Removes the mapping for a key from this cache if it is present (optional operation).
int	size() Returns the number of key-value mappings in this cache.
String	toString()

从类继承的方法 java.lang.Object

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

从接口继承的方法 java.lang.Iterable

spliterator

方法详细资料

create

public static <K,V> FixSizeLRUCache<K,V> create()

create

public static <K,V> FixSizeLRUCache<K,V> create(int size)

get

public V get(K k)

Returns the value to which the specified key is mapped, or null if this cache contains no mapping for the key.

指定者:

get 在接口中 Cache<K,V>

参数:

k - the key whose associated value is to be returned

返回:

the value to which the specified key is mapped, or null if this cache contains no mapping for the key

put

public void put(K k,
                V v)

Associates the specified value with the specified key in this cache. If the cache previously contained a mapping for the key, the old value is replaced by the specified value.

指定者:

put 在接口中 Cache<K,V>

参数:

k - key with which the specified value is to be associated the key must not be null

v - value to be associated with the specified key

remove

public V remove(K k)

Removes the mapping for a key from this cache if it is present (optional operation). More formally, if this cache contains a mapping from key k to value v, that mapping is removed.

指定者:

remove 在接口中 Cache<K,V>

参数:

k - key whose mapping is to be removed from the cache

返回:

the previous value associated with key, or null if there was no mapping for key.

remove

protected FixSizeLRUCache.E<K,V> remove()

Remove the last item

返回:

the last item

clear

public void clear()

Removes all the mappings from this cache (optional operation). The cache will be empty after this call returns.

指定者:

clear 在接口中 Cache<K,V>

size

public int size()

Returns the number of key-value mappings in this cache.

指定者:

size 在接口中 Cache<K,V>

返回:

the number of key-value mappings in this cache

iterator

public Iterator<Cache.Entry<K,V>> iterator()

Returns an iterator over elements of type Cache.Entry<K, V>.

指定者:

iterator 在接口中 Iterable<Cache.Entry<K,V>>

返回:

an Iterator.

forEach

public void forEach(Consumer<? super Cache.Entry<K,V>> action)

Performs the given action for each element of the Iterable until all elements have been processed or the action throws an exception. Unless otherwise specified by the implementing class, actions are performed in the order of iteration (if an iteration order is specified). Exceptions thrown by the action are relayed to the caller.

The default implementation behaves as if:

     for (T t : this)
         action.accept(t);
 

指定者:

forEach 在接口中 Iterable<Cache.Entry<K,V>>

参数:

action - The action to be performed for each element

抛出:

NullPointerException - if the specified action is null

toString

public String toString()

覆盖:

toString 在类中 Object