MultiMap (crane4j-core 2.8.0 API)

所有已知实现类:

EmptyMultiMap, StandardMultiMap
```
public interface MultiMap<K,V>
```
A map that can hold multiple values for a key.

作者:

huangchengxing

另请参阅:

StandardMultiMap

方法概要

所有方法静态方法实例方法抽象方法默认方法
限定符和类型	方法和说明
`static <K,V> MultiMap<K,V>`	`arrayListMultimap()` Create a new `MultiMap` instance with `HashMap` as the underlying map and `ArrayList` as the collection.
`Map<K,Collection<V>>`	`asMap()` Get java map of the multimap, the returned map is modifiable.
`void`	`clear()` Clear the map and remove all key-value pairs.
`boolean`	`containsKey(Object o)` Whether the map contains the specified key.
`static <K,V> MultiMap<K,V>`	`emptyMultiMap()` Get a new empty `MultiMap` instance.
`Collection<Map.Entry<K,V>>`	`entries()` Get all key-value pairs in the map.
`boolean`	`equals(Object o)` Whether the map is equal to the specified object.
`default void`	`forEach(BiConsumer<? super K,? super V> action)` Traverse all key-value pairs in the map.
`Collection<V>`	`get(K k)` Get all values of the specified key, if the key does not exist, return an empty collection.
`int`	`hashCode()` Get the hash code of the map.
`boolean`	`isEmpty()` Whether the map is empty.
`Set<K>`	`keySet()` Get all keys in the map.
`static <K,V> MultiMap<K,V>`	`linkedHashMultimap()` Create a new `MultiMap` instance with `LinkedHashMap` as the underlying map and `LinkedHashSet` as the collection.
`static <K,V> MultiMap<K,V>`	`linkedListMultimap()` Create a new `MultiMap` instance with `LinkedHashMap` as the underlying map and `ArrayList` as the collection.
`boolean`	`put(K k, V v)` Put the specified key-value pair into the map.
`void`	`putAll(K k, Iterable<? extends V> iterable)` Put all key-value pairs in the specified map into the map.
`void`	`putAll(MultiMap<K,V> multiMap)` Put all key-value pairs in the specified map into the map.
`Collection<V>`	`removeAll(Object o)` Remove all key-value pairs with the specified key from the map.
`int`	`size()` Get the total number of key-value pairs in the map.
`Collection<V>`	`values()` Get all values in the map.

- 方法详细资料
  - arrayListMultimap
```
static <K,V> MultiMap<K,V> arrayListMultimap()
```
    Create a new MultiMap instance with HashMap as the underlying map and ArrayList as the collection.
    
    返回:
    
    a new MultiMap instance
    
    另请参阅:
    
    HashMap, ArrayList
  - linkedListMultimap
```
static <K,V> MultiMap<K,V> linkedListMultimap()
```
    Create a new MultiMap instance with LinkedHashMap as the underlying map and ArrayList as the collection.
    
    返回:
    
    a new MultiMap instance
    
    另请参阅:
    
    LinkedHashMap, ArrayList
  - linkedHashMultimap
```
static <K,V> MultiMap<K,V> linkedHashMultimap()
```
    Create a new MultiMap instance with LinkedHashMap as the underlying map and LinkedHashSet as the collection.
    
    返回:
    
    a new MultiMap instance
    
    另请参阅:
    
    LinkedHashMap, LinkedHashSet
  - emptyMultiMap
```
static <K,V> MultiMap<K,V> emptyMultiMap()
```
    Get a new empty MultiMap instance.
    
    返回:
    
    a empty MultiMap instance
  - size
```
int size()
```
    Get the total number of key-value pairs in the map.
    
    返回:
    
    the total number of key-value pairs in the map
  - isEmpty
```
boolean isEmpty()
```
    Whether the map is empty.
    
    返回:
    
    whether the map is empty
  - containsKey
```
boolean containsKey(Object o)
```
    Whether the map contains the specified key.
    
    参数:
    
    o - key
    
    返回:
    
    whether the map contains the specified key
  - put
```
boolean put(K k,
            V v)
```
    Put the specified key-value pair into the map.
    
    参数:
    
    k - key
    
    v - value
    
    返回:
    
    whether the map has changed
  - putAll
```
void putAll(K k,
            Iterable<? extends V> iterable)
```
    Put all key-value pairs in the specified map into the map.
    
    参数:
    
    k - key
    
    iterable - values
  - putAll
```
void putAll(MultiMap<K,V> multiMap)
```
    Put all key-value pairs in the specified map into the map.
    
    参数:
    
    multiMap - map
  - removeAll
```
Collection<V> removeAll(Object o)
```
    Remove all key-value pairs with the specified key from the map.
    
    参数:
    
    o - key
    
    返回:
    
    all values of the specified key
  - clear
```
void clear()
```
    Clear the map and remove all key-value pairs.
  - get
```
Collection<V> get(K k)
```
    Get all values of the specified key, if the key does not exist, return an empty collection.
    
    参数:
    
    k - key
    
    返回:
    
    all values of the specified key
  - keySet
```
Set<K> keySet()
```
    Get all keys in the map.
    
    返回:
    
    all keys in the map
  - values
```
Collection<V> values()
```
    Get all values in the map.
    
    返回:
    
    all values in the map
  - entries
```
Collection<Map.Entry<K,V>> entries()
```
    Get all key-value pairs in the map.
    The returned entries are modifiable, but the modification will not affect the map.
    
    返回:
    
    all key-value pairs in the map
  - forEach
```
default void forEach(BiConsumer<? super K,? super V> action)
```
    Traverse all key-value pairs in the map.
    
    参数:
    
    action - action
  - asMap
```
Map<K,Collection<V>> asMap()
```
    Get java map of the multimap, the returned map is modifiable.
    
    返回:
    
    java map of the multi map
  - equals
```
boolean equals(Object o)
```
    Whether the map is equal to the specified object.
    The result is true if and only if the specified object is also a MultiMap, and the two maps have the same result for equals for java map returned by asMap().
    
    覆盖:
    
    equals 在类中 Object
    
    参数:
    
    o - object
    
    返回:
    
    whether the map is equal to the specified object
  - hashCode
```
int hashCode()
```
    Get the hash code of the map.
    The hash code is defined as the hash code of the java map returned by asMap().
    
    覆盖:
    
    hashCode 在类中 Object
    
    返回:
    
    the hash code of the map

接口 MultiMap<K,V>

方法概要

方法详细资料

arrayListMultimap

linkedListMultimap

linkedHashMultimap

emptyMultiMap

size

isEmpty

containsKey

put

putAll

putAll

removeAll

clear

get

keySet

values

entries

forEach

asMap

equals

hashCode