ConcurrentSkipListMap.ComputeIfAbsent(Object, IFunction) Method

Reference

Definition

Namespace:: Java.Util.Concurrent

Assembly:: Mono.Android.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

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 null.

[Android.Runtime.Register("computeIfAbsent", "(Ljava/lang/Object;Ljava/util/function/Function;)Ljava/lang/Object;", "GetComputeIfAbsent_Ljava_lang_Object_Ljava_util_function_Function_Handler", ApiSince=24)]
public virtual Java.Lang.Object? ComputeIfAbsent (Java.Lang.Object? key, Java.Util.Functions.IFunction? mappingFunction);

[<Android.Runtime.Register("computeIfAbsent", "(Ljava/lang/Object;Ljava/util/function/Function;)Ljava/lang/Object;", "GetComputeIfAbsent_Ljava_lang_Object_Ljava_util_function_Function_Handler", ApiSince=24)>]
abstract member ComputeIfAbsent : Java.Lang.Object * Java.Util.Functions.IFunction -> Java.Lang.Object
override this.ComputeIfAbsent : Java.Lang.Object * Java.Util.Functions.IFunction -> Java.Lang.Object

Parameters

key: Object

key with which the specified value is to be associated

mappingFunction: IFunction

the function to compute a value

Returns

Object

the current (existing or computed) value associated with the specified key, or null if the computed value is null

Attributes: RegisterAttribute

Remarks

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 null. The function is <em>NOT</em> guaranteed to be applied once atomically only if the value is not present.

Added in 1.8.

Java documentation for java.util.concurrent.ConcurrentSkipListMap.computeIfAbsent(K, java.util.function.Function<? super K, ? extends V>).

Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.

Applies to

通过