Detailed difference between Java8 ForkJoinPool and Executors.newWorkStealingPool?

Question

What is the low-level difference among using:

ForkJoinPool = new ForkJoinPool(X);

and

ExecutorService ex = Executors.neWorkStea         


        

Answer 1

newWorkStealingPool is a higher level of abstraction for ForkJoinPool.

If you look at the Oracle jvm implementation, it's simply a preconfigured ForkJoinPool:

public static ExecutorService newWorkStealingPool() {
    return new ForkJoinPool(Runtime.getRuntime().availableProcessors(),
                            ForkJoinPool.defaultForkJoinWorkerThreadFactory,
                            null, 
                            true);
}

Unfortunately looking at implementations isn't a proper way for understanding purpose of a class though.

Also credit to: https://dzone.com/articles/diving-into-java-8s-newworkstealingpools