Interface Long2DoubleMap
- All Superinterfaces:
Function<java.lang.Long,java.lang.Double>,java.util.function.Function<java.lang.Long,java.lang.Double>,Long2DoubleFunction,java.util.function.LongToDoubleFunction,java.util.Map<java.lang.Long,java.lang.Double>
- All Known Subinterfaces:
Long2DoubleSortedMap
- All Known Implementing Classes:
AbstractLong2DoubleMap,AbstractLong2DoubleSortedMap,Long2DoubleArrayMap,Long2DoubleAVLTreeMap,Long2DoubleLinkedOpenHashMap,Long2DoubleMaps.EmptyMap,Long2DoubleMaps.Singleton,Long2DoubleMaps.SynchronizedMap,Long2DoubleMaps.UnmodifiableMap,Long2DoubleOpenCustomHashMap,Long2DoubleOpenHashMap,Long2DoubleRBTreeMap,Long2DoubleSortedMaps.EmptySortedMap,Long2DoubleSortedMaps.Singleton,Long2DoubleSortedMaps.SynchronizedSortedMap,Long2DoubleSortedMaps.UnmodifiableSortedMap
public interface Long2DoubleMap extends Long2DoubleFunction, java.util.Map<java.lang.Long,java.lang.Double>
Map; provides some additional methods that use polymorphism to avoid (un)boxing, and handling of a default return value.
Besides extending the corresponding type-specific function, this interface strengthens Map.entrySet(),
keySet() and values(). Moreover, a number of methods, such as size(), defaultReturnValue(), etc., are un-defaulted
as their function default do not make sense for a map.
Maps returning entry sets of type Long2DoubleMap.FastEntrySet support also fast iteration.
A submap or subset may or may not have an independent default return value (which however must be initialized to the default return value of the originator).
- See Also:
Map
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Nested Class Summary
Nested Classes Modifier and Type Interface Description static interfaceLong2DoubleMap.EntryA type-specificMap.Entry; provides some additional methods that use polymorphism to avoid (un)boxing.static interfaceLong2DoubleMap.FastEntrySetAn entry set providing fast iteration. -
Method Summary
Modifier and Type Method Description default voidclear()Removes all of the mappings from this map (optional operation).default doublecompute(long key, java.util.function.BiFunction<? super java.lang.Long,? super java.lang.Double,? extends java.lang.Double> remappingFunction)Attempts to compute a mapping for the specified key and its current mapped value (ornullif there is no current mapping).default java.lang.Doublecompute(java.lang.Long key, java.util.function.BiFunction<? super java.lang.Long,? super java.lang.Double,? extends java.lang.Double> remappingFunction)Deprecated.Please use the corresponding type-specific method instead.default doublecomputeIfAbsent(long key, Long2DoubleFunction mappingFunction)If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map, unless the key is not present in the given mapping function.default doublecomputeIfAbsent(long key, java.util.function.LongToDoubleFunction mappingFunction)If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map.default java.lang.DoublecomputeIfAbsent(java.lang.Long key, java.util.function.Function<? super java.lang.Long,? extends java.lang.Double> mappingFunction)Deprecated.Please use the corresponding type-specific method instead.default doublecomputeIfAbsentNullable(long key, java.util.function.LongFunction<? extends java.lang.Double> mappingFunction)If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map unless it isnull.default doublecomputeIfAbsentPartial(long key, Long2DoubleFunction mappingFunction)Deprecated.Please usecomputeIfAbsent()instead.default doublecomputeIfPresent(long key, java.util.function.BiFunction<? super java.lang.Long,? super java.lang.Double,? extends java.lang.Double> remappingFunction)If the value for the specified key is present, attempts to compute a new mapping given the key and its current mapped value.default java.lang.DoublecomputeIfPresent(java.lang.Long key, java.util.function.BiFunction<? super java.lang.Long,? super java.lang.Double,? extends java.lang.Double> remappingFunction)Deprecated.Please use the corresponding type-specific method instead.booleancontainsKey(long key)Returns true if this function contains a mapping for the specified key.default booleancontainsKey(java.lang.Object key)Deprecated.Please use the corresponding type-specific method instead.booleancontainsValue(double value)Returnstrueif this map maps one or more keys to the specified value.default booleancontainsValue(java.lang.Object value)Deprecated.Please use the corresponding type-specific method instead.doubledefaultReturnValue()Gets the default return value.voiddefaultReturnValue(double rv)Sets the default return value (optional operation).default ObjectSet<java.util.Map.Entry<java.lang.Long,java.lang.Double>>entrySet()Deprecated.Please use the corresponding type-specific method instead.default voidforEach(java.util.function.BiConsumer<? super java.lang.Long,? super java.lang.Double> consumer)default java.lang.Doubleget(java.lang.Object key)Deprecated.Please use the corresponding type-specific method instead.default doublegetOrDefault(long key, double defaultValue)Returns the value to which the specified key is mapped, or thedefaultValueif this map contains no mapping for the key.default java.lang.DoublegetOrDefault(java.lang.Object key, java.lang.Double defaultValue)Deprecated.Please use the corresponding type-specific method instead.LongSetkeySet()ObjectSet<Long2DoubleMap.Entry>long2DoubleEntrySet()Returns a type-specific set view of the mappings contained in this map.default doublemerge(long key, double value, java.util.function.BiFunction<? super java.lang.Double,? super java.lang.Double,? extends java.lang.Double> remappingFunction)If the specified key is not already associated with a value, associates it with the givenvalue.default java.lang.Doublemerge(java.lang.Long key, java.lang.Double value, java.util.function.BiFunction<? super java.lang.Double,? super java.lang.Double,? extends java.lang.Double> remappingFunction)Deprecated.Please use the corresponding type-specific method instead.default doublemergeDouble(long key, double value, DoubleBinaryOperator remappingFunction)If the specified key is not already associated with a value, associates it with the givenvalue.default doublemergeDouble(long key, double value, java.util.function.DoubleBinaryOperator remappingFunction)If the specified key is not already associated with a value, associates it with the givenvalue.default java.lang.Doubleput(java.lang.Long key, java.lang.Double value)Deprecated.Please use the corresponding type-specific method instead.default doubleputIfAbsent(long key, double value)If the specified key is not already associated with a value, associates it with the given value and returns the default return value, else returns the current value.default java.lang.DoubleputIfAbsent(java.lang.Long key, java.lang.Double value)Deprecated.Please use the corresponding type-specific method instead.default booleanremove(long key, double value)Removes the entry for the specified key only if it is currently mapped to the specified value.default java.lang.Doubleremove(java.lang.Object key)Deprecated.Please use the corresponding type-specific method instead.default booleanremove(java.lang.Object key, java.lang.Object value)Deprecated.Please use the corresponding type-specific method instead.default doublereplace(long key, double value)Replaces the entry for the specified key only if it is currently mapped to some value.default booleanreplace(long key, double oldValue, double newValue)Replaces the entry for the specified key only if currently mapped to the specified value.default java.lang.Doublereplace(java.lang.Long key, java.lang.Double value)Deprecated.Please use the corresponding type-specific method instead.default booleanreplace(java.lang.Long key, java.lang.Double oldValue, java.lang.Double newValue)Deprecated.Please use the corresponding type-specific method instead.intsize()Returns the number of key/value mappings in this map.DoubleCollectionvalues()Methods inherited from interface it.unimi.dsi.fastutil.longs.Long2DoubleFunction
andThen, andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, applyAsDouble, compose, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort, get, put, removeMethods inherited from interface java.util.Map
equals, hashCode, isEmpty, putAll, replaceAll
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Method Details
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size
int size()Returns the number of key/value mappings in this map. If the map contains more thanInteger.MAX_VALUEelements, returnsInteger.MAX_VALUE. -
clear
default void clear()Removes all of the mappings from this map (optional operation). The map will be empty after this call returns. -
defaultReturnValue
void defaultReturnValue(double rv)Sets the default return value (optional operation). This value must be returned by type-specific versions ofget(),put()andremove()to denote that the map does not contain the specified key. It must be 0/falseby default.- Specified by:
defaultReturnValuein interfaceLong2DoubleFunction- Parameters:
rv- the new default return value.- See Also:
defaultReturnValue()
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defaultReturnValue
double defaultReturnValue()Gets the default return value.- Specified by:
defaultReturnValuein interfaceLong2DoubleFunction- Returns:
- the current default return value.
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long2DoubleEntrySet
ObjectSet<Long2DoubleMap.Entry> long2DoubleEntrySet()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
Map.entrySet()so that it returns anObjectSetof type-specific entries (the latter makes it possible to access keys and values with type-specific methods).- Returns:
- a type-specific set view of the mappings contained in this map.
- See Also:
Map.entrySet()
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entrySet
Deprecated.Please use the corresponding type-specific method instead.Returns a set view of the mappings contained in this map.- Specified by:
entrySetin interfacejava.util.Map<java.lang.Long,java.lang.Double>- Returns:
- a set view of the mappings contained in this map.
- See Also:
Map.entrySet()- API Notes:
- Note that this specification strengthens the one given in
Map.entrySet().
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put
@Deprecated default java.lang.Double put(java.lang.Long key, java.lang.Double value)Deprecated.Please use the corresponding type-specific method instead.Associates the specified value with the specified key in this function (optional operation).This default implementation just delegates to the corresponding type-specific–function method.
- Specified by:
putin interfaceFunction<java.lang.Long,java.lang.Double>- Specified by:
putin interfaceLong2DoubleFunction- Specified by:
putin interfacejava.util.Map<java.lang.Long,java.lang.Double>- Parameters:
key- the key.value- the value.- Returns:
- the old value, or
nullif no value was present for the given key. - See Also:
Map.put(Object,Object)
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get
@Deprecated default java.lang.Double get(java.lang.Object key)Deprecated.Please use the corresponding type-specific method instead.Returns the value associated by this function to the specified key.This default implementation just delegates to the corresponding type-specific–function method.
- Specified by:
getin interfaceFunction<java.lang.Long,java.lang.Double>- Specified by:
getin interfaceLong2DoubleFunction- Specified by:
getin interfacejava.util.Map<java.lang.Long,java.lang.Double>- Parameters:
key- the key.- Returns:
- the corresponding value, or
nullif no value was present for the given key. - See Also:
Map.get(Object)
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remove
@Deprecated default java.lang.Double remove(java.lang.Object key)Deprecated.Please use the corresponding type-specific method instead.Removes this key and the associated value from this function if it is present (optional operation).This default implementation just delegates to the corresponding type-specific–function method.
- Specified by:
removein interfaceFunction<java.lang.Long,java.lang.Double>- Specified by:
removein interfaceLong2DoubleFunction- Specified by:
removein interfacejava.util.Map<java.lang.Long,java.lang.Double>- Parameters:
key- the key.- Returns:
- the old value, or
nullif no value was present for the given key. - See Also:
Map.remove(Object)
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keySet
LongSet keySet()- Specified by:
keySetin interfacejava.util.Map<java.lang.Long,java.lang.Double>- Returns:
- a set view of the keys contained in this map.
- See Also:
Map.keySet()- API Notes:
- Note that this specification strengthens the one given in
Map.keySet().
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values
DoubleCollection values()- Specified by:
valuesin interfacejava.util.Map<java.lang.Long,java.lang.Double>- Returns:
- a set view of the values contained in this map.
- See Also:
Map.values()- API Notes:
- Note that this specification strengthens the one given in
Map.values().
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containsKey
boolean containsKey(long key)Returns true if this function contains a mapping for the specified key.- Specified by:
containsKeyin interfaceLong2DoubleFunction- Parameters:
key- the key.- Returns:
- true if this function associates a value to
key. - See Also:
Map.containsKey(Object)
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containsKey
@Deprecated default boolean containsKey(java.lang.Object key)Deprecated.Please use the corresponding type-specific method instead.Returns true if this function contains a mapping for the specified key.This default implementation just delegates to the corresponding type-specific–function method.
- Specified by:
containsKeyin interfaceFunction<java.lang.Long,java.lang.Double>- Specified by:
containsKeyin interfaceLong2DoubleFunction- Specified by:
containsKeyin interfacejava.util.Map<java.lang.Long,java.lang.Double>- Parameters:
key- the key.- Returns:
- true if this function associates a value to
key. - See Also:
Map.containsKey(Object)
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containsValue
boolean containsValue(double value)Returnstrueif this map maps one or more keys to the specified value.- See Also:
Map.containsValue(Object)
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containsValue
@Deprecated default boolean containsValue(java.lang.Object value)Deprecated.Please use the corresponding type-specific method instead.- Specified by:
containsValuein interfacejava.util.Map<java.lang.Long,java.lang.Double>
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forEach
default void forEach(java.util.function.BiConsumer<? super java.lang.Long,? super java.lang.Double> consumer)- Specified by:
forEachin interfacejava.util.Map<java.lang.Long,java.lang.Double>
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getOrDefault
default double getOrDefault(long key, double defaultValue)Returns the value to which the specified key is mapped, or thedefaultValueif this map contains no mapping for the key.- Specified by:
getOrDefaultin interfaceLong2DoubleFunction- Parameters:
key- the key.defaultValue- the default mapping of the key.- Returns:
- the value to which the specified key is mapped, or the
defaultValueif this map contains no mapping for the key. - Since:
- 8.0.0
- See Also:
Map.getOrDefault(Object, Object)
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putIfAbsent
default double putIfAbsent(long key, double value)If the specified key is not already associated with a value, associates it with the given value and returns the default return value, else returns the current value.- Parameters:
key- key with which the specified value is to be associated.value- value to be associated with the specified key.- Returns:
- the previous value associated with the specified key, or the default return value if there was no mapping for the key.
- Since:
- 8.0.0
- See Also:
Map.putIfAbsent(Object, Object)
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remove
default boolean remove(long key, double value)Removes the entry for the specified key only if it is currently mapped to the specified value.- Parameters:
key- key with which the specified value is associated.value- value expected to be associated with the specified key.- Returns:
trueif the value was removed.- Since:
- 8.0.0
- See Also:
Map.remove(Object, Object)
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replace
default boolean replace(long key, double oldValue, double newValue)Replaces the entry for the specified key only if currently mapped to the specified value.- Parameters:
key- key with which the specified value is associated.oldValue- value expected to be associated with the specified key.newValue- value to be associated with the specified key.- Returns:
trueif the value was replaced.- Since:
- 8.0.0
- See Also:
Map.replace(Object, Object, Object)
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replace
default double replace(long key, double value)Replaces the entry for the specified key only if it is currently mapped to some value.- Parameters:
key- key with which the specified value is associated.value- value to be associated with the specified key.- Returns:
- the previous value associated with the specified key, or the default return value if there was no mapping for the key.
- Since:
- 8.0.0
- See Also:
Map.replace(Object, Object)
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computeIfAbsent
default double computeIfAbsent(long key, java.util.function.LongToDoubleFunction mappingFunction)If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map.Note that contrarily to the default computeIfAbsent(), it is not possible to not add a value for a given key, since the
mappingFunctioncannot returnnull. If such a behavior is needed, please use the corresponding nullable version.- Parameters:
key- key with which the specified value is to be associated.mappingFunction- the function to compute a value.- Returns:
- the current (existing or computed) value associated with the specified key.
- Since:
- 8.0.0
- See Also:
Map.computeIfAbsent(Object, java.util.function.Function)- API Notes:
- all
computeIfAbsent()methods have a different logic based on the argument; no delegation is performed, contrarily to other superficially similar methods such asIterator.forEachRemaining(java.util.function.Consumer<? super E>)orList.replaceAll(java.util.function.UnaryOperator<E>).
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computeIfAbsentNullable
default double computeIfAbsentNullable(long key, java.util.function.LongFunction<? extends java.lang.Double> mappingFunction)If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map unless it isnull.Note that this version of computeIfAbsent() should be used only if you plan to return
nullin the mapping function.- Parameters:
key- key with which the specified value is to be associated.mappingFunction- the function to compute a value.- Returns:
- the current (existing or computed) value associated with the specified key,
or the default return value if the computed value is
null. - Since:
- 8.0.0
- See Also:
Map.computeIfAbsent(Object, java.util.function.Function)
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computeIfAbsent
If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map, unless the key is not present in the given mapping function.This version of computeIfAbsent() uses a type-specific version of
fastutil'sFunction. SinceFunctionhas acontainsKey()method, it is possible to avoid adding a key by havingcontainsKey()returnfalsefor that key.- Parameters:
key- key with which the specified value is to be associated.mappingFunction- the function to compute a value.- Returns:
- the current (existing or computed) value associated with the specified key.
- Since:
- 8.0.0
- See Also:
Map.computeIfAbsent(Object, java.util.function.Function)- API Notes:
- all
computeIfAbsent()methods have a different logic based on the argument; no delegation is performed, contrarily to other superficially similar methods such asIterator.forEachRemaining(java.util.function.Consumer<? super E>)orList.replaceAll(java.util.function.UnaryOperator<E>).
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computeIfAbsentPartial
Deprecated.Please usecomputeIfAbsent()instead. -
computeIfPresent
default double computeIfPresent(long key, java.util.function.BiFunction<? super java.lang.Long,? super java.lang.Double,? extends java.lang.Double> remappingFunction)If the value for the specified key is present, attempts to compute a new mapping given the key and its current mapped value.- Parameters:
key- key with which the specified value is to be associated.remappingFunction- the function to compute a value.- Returns:
- the new value associated with the specified key, or the default return value if none.
- Since:
- 8.0.0
- See Also:
Map.computeIfPresent(Object, java.util.function.BiFunction)
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compute
default double compute(long key, java.util.function.BiFunction<? super java.lang.Long,? super java.lang.Double,? extends java.lang.Double> remappingFunction)Attempts to compute a mapping for the specified key and its current mapped value (ornullif there is no current mapping).If the function returns
null, the mapping is removed (or remains absent if initially absent). If the function itself throws an (unchecked) exception, the exception is rethrown, and the current mapping is left unchanged.- Parameters:
key- key with which the specified value is to be associated.remappingFunction- the function to compute a value.- Returns:
- the new value associated with the specified key, or the default return value if none.
- Since:
- 8.0.0
- See Also:
Map.compute(Object, java.util.function.BiFunction)
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merge
default double merge(long key, double value, java.util.function.BiFunction<? super java.lang.Double,? super java.lang.Double,? extends java.lang.Double> remappingFunction)If the specified key is not already associated with a value, associates it with the givenvalue. Otherwise, replaces the associated value with the results of the given remapping function, or removes if the result isnull.- Parameters:
key- key with which the resulting value is to be associated.value- the value to be merged with the existing value associated with the key or, if no existing value is associated with the key, to be associated with the key.remappingFunction- the function to recompute a value if present.- Returns:
- the new value associated with the specified key, or the default return value if no value is associated with the key.
- Since:
- 8.0.0
- See Also:
Map.merge(Object, Object, java.util.function.BiFunction)- API Notes:
- The JDK specification for this method equates not being associated with a value with being associated with {code null}. This is not the case for this method.
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mergeDouble
default double mergeDouble(long key, double value, java.util.function.DoubleBinaryOperator remappingFunction)If the specified key is not already associated with a value, associates it with the givenvalue. Otherwise, replaces the associated value with the results of the given remapping function.- Parameters:
key- key with which the resulting value is to be associated.value- the value to be merged with the existing value associated with the key or, if no existing value is associated with the key, to be associated with the key.remappingFunction- the function to recompute a value if present.- Returns:
- the new value associated with the specified key.
- Since:
- 8.5.0
- See Also:
Map.merge(Object, Object, java.util.function.BiFunction)- API Notes:
- The JDK specification for this method equates not being associated with a value with being associated with {code null}.
This is not the case for this method. Moreover, this method cannot delete entries as the type-specific remapping
function cannot return
null.
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mergeDouble
If the specified key is not already associated with a value, associates it with the givenvalue. Otherwise, replaces the associated value with the results of the given remapping function.- Parameters:
key- key with which the resulting value is to be associated.value- the value to be merged with the existing value associated with the key or, if no existing value is associated with the key, to be associated with the key.remappingFunction- the function to recompute a value if present.- Since:
- 8.5.1
- See Also:
Map.merge(Object, Object, java.util.function.BiFunction)- API Notes:
- The JDK specification for this method equates not being associated with a value with being associated with {code null}.
This is not the case for this method. Moreover, this method cannot delete entries as the type-specific remapping
function cannot return
null.WARNING: Overriding this method is almost always a mistake, as this overload only exists to disambiguate. Instead, override the overload that uses the JDK's primitive binary operator (e.g.
IntBinaryOperator).If Java supported final default methods, this would be one, but sadly it does not.
If you checked and are overriding the version with
java.util.function.XBinaryOperator, and still see this warning, then your IDE is incorrectly conflating this method with the proper method to override, and you can safely ignore this message.
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getOrDefault
@Deprecated default java.lang.Double getOrDefault(java.lang.Object key, java.lang.Double defaultValue)Deprecated.Please use the corresponding type-specific method instead.Returns the value associated by this function to the specified key, or give the specified value if not present.This default implementation just delegates to the corresponding
Mapmethod.- Specified by:
getOrDefaultin interfaceFunction<java.lang.Long,java.lang.Double>- Specified by:
getOrDefaultin interfaceLong2DoubleFunction- Specified by:
getOrDefaultin interfacejava.util.Map<java.lang.Long,java.lang.Double>- Parameters:
key- the key.defaultValue- the default value to return if not present.- Returns:
- the corresponding value, or
defaultValueif no value was present for the given key. - See Also:
Map.getOrDefault(Object, Object)
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putIfAbsent
@Deprecated default java.lang.Double putIfAbsent(java.lang.Long key, java.lang.Double value)Deprecated.Please use the corresponding type-specific method instead.This default implementation just delegates to the corresponding
Mapmethod.- Specified by:
putIfAbsentin interfacejava.util.Map<java.lang.Long,java.lang.Double>
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remove
@Deprecated default boolean remove(java.lang.Object key, java.lang.Object value)Deprecated.Please use the corresponding type-specific method instead.This default implementation just delegates to the corresponding
Mapmethod.- Specified by:
removein interfacejava.util.Map<java.lang.Long,java.lang.Double>
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replace
@Deprecated default boolean replace(java.lang.Long key, java.lang.Double oldValue, java.lang.Double newValue)Deprecated.Please use the corresponding type-specific method instead.This default implementation just delegates to the corresponding
Mapmethod.- Specified by:
replacein interfacejava.util.Map<java.lang.Long,java.lang.Double>
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replace
@Deprecated default java.lang.Double replace(java.lang.Long key, java.lang.Double value)Deprecated.Please use the corresponding type-specific method instead.This default implementation just delegates to the corresponding
Mapmethod.- Specified by:
replacein interfacejava.util.Map<java.lang.Long,java.lang.Double>
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computeIfAbsent
@Deprecated default java.lang.Double computeIfAbsent(java.lang.Long key, java.util.function.Function<? super java.lang.Long,? extends java.lang.Double> mappingFunction)Deprecated.Please use the corresponding type-specific method instead.This default implementation just delegates to the corresponding
Mapmethod.- Specified by:
computeIfAbsentin interfacejava.util.Map<java.lang.Long,java.lang.Double>
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computeIfPresent
@Deprecated default java.lang.Double computeIfPresent(java.lang.Long key, java.util.function.BiFunction<? super java.lang.Long,? super java.lang.Double,? extends java.lang.Double> remappingFunction)Deprecated.Please use the corresponding type-specific method instead.This default implementation just delegates to the corresponding
Mapmethod.- Specified by:
computeIfPresentin interfacejava.util.Map<java.lang.Long,java.lang.Double>
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compute
@Deprecated default java.lang.Double compute(java.lang.Long key, java.util.function.BiFunction<? super java.lang.Long,? super java.lang.Double,? extends java.lang.Double> remappingFunction)Deprecated.Please use the corresponding type-specific method instead.This default implementation just delegates to the corresponding
Mapmethod.- Specified by:
computein interfacejava.util.Map<java.lang.Long,java.lang.Double>
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merge
@Deprecated default java.lang.Double merge(java.lang.Long key, java.lang.Double value, java.util.function.BiFunction<? super java.lang.Double,? super java.lang.Double,? extends java.lang.Double> remappingFunction)Deprecated.Please use the corresponding type-specific method instead.This default implementation just delegates to the corresponding
Mapmethod.- Specified by:
mergein interfacejava.util.Map<java.lang.Long,java.lang.Double>
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