Difference between recursive task and recursive action in ForkJoinPool
From the first lines of their respective Javadocs:
- [
RecursiveTaskis] A recursive result-bearing ForkJoinTask.- [
RecursiveActionis] A recursive resultless ForkJoinTask.
Although technically, RecursiveAction does return a value, it's just always null, because it's a ForkJoinTask<Void>, and that's the only possible value of Void.
They are alike except RecursiveTask returns a result while RecursiveAction has no return value.