IConcurrentMap.Replace Method

Definition

Namespace:

Java.Util.Concurrent

Assembly:

Mono.Android.dll

Overloads

Replace(Object, Object)	Replaces the entry for a key only if currently mapped to some value.
Replace(Object, Object, Object)	Replaces the entry for a key only if currently mapped to a given value.

Replace(Object, Object)

Replaces the entry for a key only if currently mapped to some value.

[Android.Runtime.Register("replace", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;", "GetReplace_Ljava_lang_Object_Ljava_lang_Object_Handler:Java.Util.Concurrent.IConcurrentMapInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null")]
public Java.Lang.Object? Replace (Java.Lang.Object? key, Java.Lang.Object? value);

[<Android.Runtime.Register("replace", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;", "GetReplace_Ljava_lang_Object_Ljava_lang_Object_Handler:Java.Util.Concurrent.IConcurrentMapInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null")>]
abstract member Replace : Java.Lang.Object * Java.Lang.Object -> Java.Lang.Object

Parameters

key

Object

key with which the specified value is associated

value

Object

value to be associated with the specified key

Returns

Object

the previous value associated with the specified key, or null if there was no mapping for the key. (A null return can also indicate that the map previously associated null with the key, if the implementation supports null values.)

Implements

Replace(Object, Object)

Attributes

RegisterAttribute

Remarks

Replaces the entry for a key only if currently mapped to some value. This is equivalent to, for this map:

{@code
            if (map.containsKey(key))
              return map.put(key, value);
            else
              return null;}

except that the action is performed atomically.

Java documentation for java.util.concurrent.ConcurrentMap.replace(K, 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.

Replace(Object, Object, Object)

Replaces the entry for a key only if currently mapped to a given value.

[Android.Runtime.Register("replace", "(Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)Z", "GetReplace_Ljava_lang_Object_Ljava_lang_Object_Ljava_lang_Object_Handler:Java.Util.Concurrent.IConcurrentMapInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null")]
public bool Replace (Java.Lang.Object? key, Java.Lang.Object? oldValue, Java.Lang.Object? newValue);

[<Android.Runtime.Register("replace", "(Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)Z", "GetReplace_Ljava_lang_Object_Ljava_lang_Object_Ljava_lang_Object_Handler:Java.Util.Concurrent.IConcurrentMapInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null")>]
abstract member Replace : Java.Lang.Object * Java.Lang.Object * Java.Lang.Object -> bool

Parameters

key

Object

key with which the specified value is associated

oldValue

Object

value expected to be associated with the specified key

newValue

Object

value to be associated with the specified key

Returns

Boolean

true if the value was replaced

Implements

Replace(Object, Object, Object)

Attributes

RegisterAttribute

Remarks

Replaces the entry for a key only if currently mapped to a given value. This is equivalent to, for this map:

{@code
            if (map.containsKey(key)
                && Objects.equals(map.get(key), oldValue)) {
              map.put(key, newValue);
              return true;
            } else {
              return false;
            }}

except that the action is performed atomically.

Java documentation for java.util.concurrent.ConcurrentMap.replace(K, V, 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.