cn.hutool.core.map.multi

Class CollectionValueMap<K,V>

java.lang.Object

cn.hutool.core.map.MapWrapper<K,Collection<V>>

cn.hutool.core.map.multi.CollectionValueMap<K,V>

Type Parameters:

K - 键类型

V - 值类型

All Implemented Interfaces:

Serializable, Cloneable, Iterable<Map.Entry<K,Collection<V>>>, Map<K,Collection<V>>

Direct Known Subclasses:

ListValueMap, SetValueMap

public abstract class CollectionValueMap<K,V>
extends MapWrapper<K,Collection<V>>

值作为集合的Map实现，通过调用putValue可以在相同key时加入多个值，多个值用集合表示

Since:

4.3.3

Author:

looly

See Also:

Serialized Form

Nested Class Summary

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

Map.Entry<K,V>

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	DEFAULT_COLLCTION_INITIAL_CAPACITY 默认集合初始大小

Fields inherited from class cn.hutool.core.map.MapWrapper

DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR

Constructor Summary

Constructors

Constructor and Description
CollectionValueMap() 构造
CollectionValueMap(float loadFactor, Map<? extends K,? extends Collection<V>> m) 构造
CollectionValueMap(int initialCapacity) 构造
CollectionValueMap(int initialCapacity, float loadFactor) 构造
CollectionValueMap(Map<? extends K,? extends Collection<V>> m) 构造

Method Summary

Modifier and Type	Method and Description
protected abstract Collection<V>	createCollection() 创建集合 此方法用于创建在putValue后追加值所在的集合，子类实现此方法创建不同类型的集合
V	get(K key, int index) 获取值
void	putValue(K key, V value) 放入Value 如果键对应值列表有值，加入，否则创建一个新列表后加入

Methods inherited from class cn.hutool.core.map.MapWrapper

clear, compute, computeIfAbsent, computeIfPresent, containsKey, containsValue, entrySet, equals, forEach, get, getOrDefault, getRaw, hashCode, isEmpty, iterator, keySet, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, replaceAll, size, toString, values

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

DEFAULT_COLLCTION_INITIAL_CAPACITY

protected static final int DEFAULT_COLLCTION_INITIAL_CAPACITY

默认集合初始大小

See Also:

Constant Field Values

Constructor Detail

CollectionValueMap

public CollectionValueMap()

构造

CollectionValueMap

public CollectionValueMap(int initialCapacity)

构造

Parameters:

initialCapacity - 初始大小

CollectionValueMap

public CollectionValueMap(Map<? extends K,? extends Collection<V>> m)

构造

Parameters:

m - Map

CollectionValueMap

public CollectionValueMap(float loadFactor,
                          Map<? extends K,? extends Collection<V>> m)

构造

Parameters:

loadFactor - 加载因子

m - Map

CollectionValueMap

public CollectionValueMap(int initialCapacity,
                          float loadFactor)

构造

Parameters:

initialCapacity - 初始大小

loadFactor - 加载因子

Method Detail

putValue

public void putValue(K key,
                     V value)

放入Value
如果键对应值列表有值，加入，否则创建一个新列表后加入

Parameters:

key - 键

value - 值

get

public V get(K key,
             int index)

获取值

Parameters:

key - 键

index - 第几个值的索引，越界返回null

Returns:

值或null

createCollection

protected abstract Collection<V> createCollection()

创建集合
此方法用于创建在putValue后追加值所在的集合，子类实现此方法创建不同类型的集合

Returns:

Collection