cn.hutool.core.map

Class BiMap<K,V>

java.lang.Object

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

cn.hutool.core.map.BiMap<K,V>

Type Parameters:

K - 键类型

V - 值类型

All Implemented Interfaces:

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

public class BiMap<K,V>
extends MapWrapper<K,V>

双向Map
互换键值对不检查值是否有重复，如果有则后加入的元素替换先加入的元素
值的顺序在HashMap中不确定，所以谁覆盖谁也不确定，在有序的Map中按照先后顺序覆盖，保留最后的值
它与TableMap的区别是，BiMap维护两个Map实现高效的正向和反向查找

Since:

5.2.6

See Also:

Serialized Form

Nested Class Summary

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

Map.Entry<K,V>

Field Summary

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

DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR

Constructor Summary

Constructors

Constructor and Description
BiMap(Map<K,V> raw) 构造

Method Summary

Modifier and Type	Method and Description
void	clear()
V	compute(K key, BiFunction<? super K,? super V,? extends V> remappingFunction)
V	computeIfAbsent(K key, Function<? super K,? extends V> mappingFunction)
V	computeIfPresent(K key, BiFunction<? super K,? super V,? extends V> remappingFunction)
Map<V,K>	getInverse() 获取反向Map
K	getKey(V value) 根据值获得键
V	merge(K key, V value, BiFunction<? super V,? super V,? extends V> remappingFunction)
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> m)
V	putIfAbsent(K key, V value)
V	remove(Object key)
boolean	remove(Object key, Object value)

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

clone, containsKey, containsValue, entrySet, equals, forEach, get, getOrDefault, getRaw, hashCode, isEmpty, iterator, keySet, replace, replace, replaceAll, size, toString, values

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

BiMap

public BiMap(Map<K,V> raw)

构造

Parameters:

raw - 被包装的Map

Method Detail

put

public V put(K key,
             V value)

Specified by:

put in interface Map<K,V>

Overrides:

put in class MapWrapper<K,V>

putAll

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

Specified by:

putAll in interface Map<K,V>

Overrides:

putAll in class MapWrapper<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

Overrides:

remove in class MapWrapper<K,V>

remove

public boolean remove(Object key,
                      Object value)

Specified by:

remove in interface Map<K,V>

Overrides:

remove in class MapWrapper<K,V>

clear

public void clear()

Specified by:

clear in interface Map<K,V>

Overrides:

clear in class MapWrapper<K,V>

getInverse

public Map<V,K> getInverse()

获取反向Map

Returns:

反向Map

getKey

public K getKey(V value)

根据值获得键

Parameters:

value - 值

Returns:

键

putIfAbsent

public V putIfAbsent(K key,
                     V value)

Specified by:

putIfAbsent in interface Map<K,V>

Overrides:

putIfAbsent in class MapWrapper<K,V>

computeIfAbsent

public V computeIfAbsent(K key,
                         Function<? super K,? extends V> mappingFunction)

Specified by:

computeIfAbsent in interface Map<K,V>

Overrides:

computeIfAbsent in class MapWrapper<K,V>

computeIfPresent

public V computeIfPresent(K key,
                          BiFunction<? super K,? super V,? extends V> remappingFunction)

Specified by:

computeIfPresent in interface Map<K,V>

Overrides:

computeIfPresent in class MapWrapper<K,V>

compute

public V compute(K key,
                 BiFunction<? super K,? super V,? extends V> remappingFunction)

Specified by:

compute in interface Map<K,V>

Overrides:

compute in class MapWrapper<K,V>

merge

public V merge(K key,
               V value,
               BiFunction<? super V,? super V,? extends V> remappingFunction)

Specified by:

merge in interface Map<K,V>

Overrides:

merge in class MapWrapper<K,V>