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What is CompletableFuture.defaultExecutor() in Java?
abhilash
Overview
defaultExecutor() is an instance method of the CompletableFuture class. This method is used to get the default pool of threads that are used by the async methods of the CompletableFuture class when a custom executor is not specified.
The defaultExecutor method is defined in the CompletableFuture class. The CompletableFuture class is defined in the java.util.concurrent package. To import the CompletableFuture class, we check the following import statement:
import java.util.concurrent.CompletableFuture;
Syntax
public Executor defaultExecutor()
Parameters
This method has no parameters.
Return value
This method returns an instance of Executor.
Code
import java.util.concurrent.*;
public class Main {
public static void main(String[] args){
CompletableFuture<String> completableFuture = CompletableFuture.completedFuture("hello-educative");
System.out.println(completableFuture.defaultExecutor());
}
}Implementation of the "defaultExecutor" method
Code explanation
- Line 1: We import the relevant packages.
- Line 6: We define a
CompletableFuture, using the completedFuture static method of theCompletableFutureclass. - Line 7: We print the default executor.
ForkJoinPoolis the default executor for the async methods.
Note: The
ForkJoinPoolis a specialized implementation ofExecutorServiceimplementing the work-stealing algorithm.
RELATED TAGS
java
communitycreator
defaultexecutor
completablefuture
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abhilash
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