java.util.concurrent · java.base · since Java 1.7

ForkJoinPool

declaration

public class ForkJoinPool extends AbstractExecutorService

Work-stealing pool for divide-and-conquer tasks; its commonPool() runs parallel streams and default CompletableFuture stages — which is why blocking it hurts everything.

CPU-bound, non-blocking tasks only; blocking work belongs in explicit executors or virtual threads

Key methods

`static ForkJoinPool commonPool()`	The shared JVM-wide pool (~cores−1 threads).
`<T> T invoke(ForkJoinTask<T> task)`	Run a recursive task to completion.