public static class Object2ObjectMaps.EmptyMap<K,V> extends Object2ObjectFunctions.EmptyFunction<K,V> implements Object2ObjectMap<K,V>, Serializable, Cloneable
This class may be useful to implement your own in case you subclass a type-specific map.
Object2ObjectMap.Entry<K,V>, Object2ObjectMap.FastEntrySet<K,V>
Modifier and Type | Method and Description |
---|---|
Object |
clone() |
boolean |
containsValue(Object v) |
ObjectSet<Map.Entry<K,V>> |
entrySet()
Returns a set view of the mappings contained in this map.
|
boolean |
equals(Object o) |
int |
hashCode() |
boolean |
isEmpty() |
ObjectSet<K> |
keySet()
Returns a set view of the keys contained in this map.
|
ObjectSet<Object2ObjectMap.Entry<K,V>> |
object2ObjectEntrySet()
Returns a type-specific set view of the mappings contained in this map.
|
void |
putAll(Map<? extends K,? extends V> m) |
String |
toString() |
ObjectCollection<V> |
values()
Returns a set view of the values contained in this map.
|
clear, containsKey, defaultReturnValue, defaultReturnValue, get, size
put, remove
defaultReturnValue, defaultReturnValue
clear, containsKey, get, put, remove, size
clear, compute, computeIfAbsent, computeIfPresent, containsKey, forEach, get, getOrDefault, merge, put, putIfAbsent, remove, remove, replace, replace, replaceAll, size
public boolean containsValue(Object v)
containsValue
in interface Map<K,V>
public ObjectSet<Object2ObjectMap.Entry<K,V>> object2ObjectEntrySet()
Object2ObjectMap
This method is necessary because there is no inheritance along
type parameters: it is thus impossible to strengthen Object2ObjectMap.entrySet()
so that it returns an ObjectSet
of objects of type Map.Entry
(the latter makes it possible to
access keys and values with type-specific methods).
object2ObjectEntrySet
in interface Object2ObjectMap<K,V>
Object2ObjectMap.entrySet()
public ObjectSet<K> keySet()
Object2ObjectMap
Note that this specification strengthens the one given in Map.keySet()
.
keySet
in interface Object2ObjectMap<K,V>
keySet
in interface Map<K,V>
Map.keySet()
public ObjectCollection<V> values()
Object2ObjectMap
Note that this specification strengthens the one given in Map.values()
.
values
in interface Object2ObjectMap<K,V>
values
in interface Map<K,V>
Map.values()
public Object clone()
clone
in class Object2ObjectFunctions.EmptyFunction<K,V>
public ObjectSet<Map.Entry<K,V>> entrySet()
Object2ObjectMap
Note that this specification strengthens the one given in Map.entrySet()
.
entrySet
in interface Object2ObjectMap<K,V>
entrySet
in interface Map<K,V>
Map.entrySet()
public int hashCode()
public boolean equals(Object o)