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CompletableFuture.completeExceptionally() in Java?

Pragya Keshap answered on February 12, 2023 Popularity 1/10 Helpfulness 1/10

answer CompletableFuture.completeExceptionally() in Java?

CompletableFuture.completeExceptionally() in Java?

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completeExceptionally() is an instance method of the CompletableFuture which is used to complete the future with the given exception. The subsequent calls to methods where we can retrieve results like get() and join() throwing the given exception.

The completeExceptionally 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 statemen

import java.util.concurrent.*;

public class Main {
    public static void main(String[] args) {
        CompletableFuture<Integer> completableFuture = new CompletableFuture<>();
        RuntimeException runtimeException = new RuntimeException("Runtime Exception");
        boolean flag = completableFuture.completeExceptionally(runtimeException);
        if(flag) System.out.println("Future moved to completed stage");
        if(completableFuture.isCompletedExceptionally()) System.out.println("Future completed exceptionally");
        Integer result = null;
        try {
            result = completableFuture.get();
        } catch (InterruptedException | ExecutionException e) {
            System.out.println("Exception while getting the result of the future. " + e.getMessage());
        }
        System.out.println("Result - " + result);
    }
}

https://www.educative.io/answers/what-is-completablefuturecompleteexceptionally-in-java

Popularity 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java

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Contributed on Feb 12 2023

Pragya Keshap

0 Answers Avg Quality 2/10

CompletableFuture.completeExceptionally() in Java?

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