ForkJoin Pool
ForkJoinPool (Java SE 11 & JDK 11 ) https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/concurrent/ForkJoinPool.html
ForkJoinPool (Java SE 11 & JDK 11 ) https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/concurrent/ForkJoinPool.html