public static class Double2IntFunctions.EmptyFunction extends AbstractDouble2IntFunction implements Serializable, Cloneable
This class may be useful to implement your own in case you subclass a type-specific function.
Modifier and Type | Method and Description |
---|---|
void |
clear()
Removes all associations from this function (optional operation).
|
Object |
clone() |
boolean |
containsKey(double k) |
int |
defaultReturnValue()
Gets the default return value.
|
void |
defaultReturnValue(int defRetValue)
Sets the default return value.
|
int |
get(double k)
Returns the value to which the given key is mapped.
|
Integer |
get(Object k)
Delegates to the corresponding type-specific method, taking care of returning
null on a missing key. |
int |
size()
Returns the intended number of keys in this function, or -1 if no such number exists.
|
containsKey, put, put, remove, remove
public int get(double k)
Double2IntFunction
get
in interface Double2IntFunction
k
- the key.Function.get(Object)
public boolean containsKey(double k)
containsKey
in interface Double2IntFunction
Function.containsKey(Object)
public int defaultReturnValue()
Double2IntFunction
defaultReturnValue
in interface Double2IntFunction
defaultReturnValue
in class AbstractDouble2IntFunction
public void defaultReturnValue(int defRetValue)
Double2IntFunction
get()
, put()
and remove()
to
denote that the map does not contain the specified key. It must be
0/false
/null
by default.defaultReturnValue
in interface Double2IntFunction
defaultReturnValue
in class AbstractDouble2IntFunction
defRetValue
- the new default return value.Double2IntFunction.defaultReturnValue()
public Integer get(Object k)
AbstractDouble2IntFunction
null
on a missing key.
This method must check whether the provided key is in the map using containsKey()
. Thus,
it probes the map twice. Implementors of subclasses should override it with a more efficient method.
get
in interface Function<Double,Integer>
get
in class AbstractDouble2IntFunction
k
- the key.null
if no value was present for the given key.Map.get(Object)
public int size()
Function
Most function implementations will have some knowledge of the intended number of keys in their domain. In some cases, however, this might not be possible.
public void clear()
Function
clear
in interface Function<Double,Integer>
clear
in class AbstractDouble2IntFunction
Map.clear()