Object2LongMaps.EmptyMap (fastutil 7.0.13)

java.lang.Object
- it.unimi.dsi.fastutil.objects.AbstractObject2LongFunction<K>
- - it.unimi.dsi.fastutil.objects.Object2LongFunctions.EmptyFunction<K>
  - - it.unimi.dsi.fastutil.objects.Object2LongMaps.EmptyMap<K>

All Implemented Interfaces:

Function<K,java.lang.Long>, Object2LongFunction<K>, Object2LongMap<K>, java.io.Serializable, java.lang.Cloneable, java.util.Map<K,java.lang.Long>

Direct Known Subclasses:

Object2LongSortedMaps.EmptySortedMap

Enclosing class:

Object2LongMaps
```
public static class Object2LongMaps.EmptyMap<K>
extends Object2LongFunctions.EmptyFunction<K>
implements Object2LongMap<K>, java.io.Serializable, java.lang.Cloneable
```
An immutable class representing an empty type-specific map.
This class may be useful to implement your own in case you subclass a type-specific map.

See Also:

Serialized Form

Nested Class Summary
- Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.objects.Object2LongMap
  Object2LongMap.Entry<K>, Object2LongMap.FastEntrySet<K>

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`java.lang.Object`	`clone()`
`boolean`	`containsValue(long v)`
`boolean`	`containsValue(java.lang.Object ov)`
`ObjectSet<java.util.Map.Entry<K,java.lang.Long>>`	`entrySet()` Returns a set view of the mappings contained in this map.
`boolean`	`equals(java.lang.Object o)`
`int`	`hashCode()`
`boolean`	`isEmpty()`
`ObjectSet<K>`	`keySet()` Returns a set view of the keys contained in this map.
`ObjectSet<Object2LongMap.Entry<K>>`	`object2LongEntrySet()` Returns a type-specific set view of the mappings contained in this map.
`void`	`putAll(java.util.Map<? extends K,? extends java.lang.Long> m)`
`java.lang.String`	`toString()`
`LongCollection`	`values()` Returns a set view of the values contained in this map.

Methods inherited from class it.unimi.dsi.fastutil.objects.Object2LongFunctions.EmptyFunction
clear, containsKey, defaultReturnValue, defaultReturnValue, getLong, size

Methods inherited from class it.unimi.dsi.fastutil.objects.AbstractObject2LongFunction
get, put, put, remove, removeLong

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.objects.Object2LongFunction
defaultReturnValue, defaultReturnValue, getLong, put, removeLong

Methods inherited from interface it.unimi.dsi.fastutil.Function
clear, containsKey, get, put, remove, size

Methods inherited from interface java.util.Map
clear, compute, computeIfAbsent, computeIfPresent, containsKey, forEach, get, getOrDefault, merge, put, putIfAbsent, remove, remove, replace, replace, replaceAll, size

- Method Detail
  - containsValue
```
public boolean containsValue(long v)
```
    Specified by:
    
    containsValue in interface Object2LongMap<K>
    
    See Also:
    
    Map.containsValue(Object)
  - putAll
```
public void putAll(java.util.Map<? extends K,? extends java.lang.Long> m)
```
    Specified by:
    
    putAll in interface java.util.Map<K,java.lang.Long>
  - object2LongEntrySet
```
public ObjectSet<Object2LongMap.Entry<K>> object2LongEntrySet()
```
    Description copied from interface: Object2LongMap
    
    Returns a type-specific set view of the mappings contained in this map.
    This method is necessary because there is no inheritance along type parameters: it is thus impossible to strengthen Object2LongMap.entrySet() so that it returns an ObjectSet of type-specific entries (the latter makes it possible to access keys and values with type-specific methods).
    
    Specified by:
    
    object2LongEntrySet in interface Object2LongMap<K>
    
    Returns:
    
    a type-specific set view of the mappings contained in this map.
    
    See Also:
    
    Object2LongMap.entrySet()
  - keySet
```
public ObjectSet<K> keySet()
```
    Description copied from interface: Object2LongMap
    
    Returns a set view of the keys contained in this map.
    Note that this specification strengthens the one given in Map.keySet().
    
    Specified by:
    
    keySet in interface Object2LongMap<K>
    
    Specified by:
    
    keySet in interface java.util.Map<K,java.lang.Long>
    
    Returns:
    
    a set view of the keys contained in this map.
    
    See Also:
    
    Map.keySet()
  - values
```
public LongCollection values()
```
    Description copied from interface: Object2LongMap
    
    Returns a set view of the values contained in this map.
    Note that this specification strengthens the one given in Map.values().
    
    Specified by:
    
    values in interface Object2LongMap<K>
    
    Specified by:
    
    values in interface java.util.Map<K,java.lang.Long>
    
    Returns:
    
    a set view of the values contained in this map.
    
    See Also:
    
    Map.values()
  - containsValue
```
public boolean containsValue(java.lang.Object ov)
```
    Specified by:
    
    containsValue in interface java.util.Map<K,java.lang.Long>
  - clone
```
public java.lang.Object clone()
```
    Overrides:
    
    clone in class Object2LongFunctions.EmptyFunction<K>
  - isEmpty
```
public boolean isEmpty()
```
    Specified by:
    
    isEmpty in interface java.util.Map<K,java.lang.Long>
  - entrySet
```
public ObjectSet<java.util.Map.Entry<K,java.lang.Long>> entrySet()
```
    Description copied from interface: Object2LongMap
    
    Returns a set view of the mappings contained in this map.
    Note that this specification strengthens the one given in Map.entrySet().
    
    Specified by:
    
    entrySet in interface Object2LongMap<K>
    
    Specified by:
    
    entrySet in interface java.util.Map<K,java.lang.Long>
    
    Returns:
    
    a set view of the mappings contained in this map.
    
    See Also:
    
    Map.entrySet()
  - hashCode
```
public int hashCode()
```
    Specified by:
    
    hashCode in interface java.util.Map<K,java.lang.Long>
    
    Overrides:
    
    hashCode in class java.lang.Object
  - equals
```
public boolean equals(java.lang.Object o)
```
    Specified by:
    
    equals in interface java.util.Map<K,java.lang.Long>
    
    Overrides:
    
    equals in class java.lang.Object
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object

Class Object2LongMaps.EmptyMap<K>

Nested Class Summary

Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.objects.Object2LongMap

Method Summary

Methods inherited from class it.unimi.dsi.fastutil.objects.Object2LongFunctions.EmptyFunction

Methods inherited from class it.unimi.dsi.fastutil.objects.AbstractObject2LongFunction

Methods inherited from class java.lang.Object

Methods inherited from interface it.unimi.dsi.fastutil.objects.Object2LongFunction

Methods inherited from interface it.unimi.dsi.fastutil.Function

Methods inherited from interface java.util.Map

Method Detail

containsValue

putAll

object2LongEntrySet

keySet

values

containsValue

clone

isEmpty

entrySet

hashCode

equals

toString