Creates a ForkJoinPool with the given parameters (using defaults for others -- see ForkJoinPool(int, ForkJoinWorkerThreadFactory, UncaughtExceptionHandler, boolean, int, int, int, Predicate, long, TimeUnit)).

Parameters:

parallelism		the parallelism level. For default value, use java.lang.Runtime.availableProcessors.
factory		the factory for creating new threads. For default value, use defaultForkJoinWorkerThreadFactory.
handler		the handler for internal worker threads that terminate due to unrecoverable errors encountered while executing tasks. For default value, use null.
asyncMode		if true, establishes local first-in-first-out scheduling mode for forked tasks that are never joined. This mode may be more appropriate than default locally stack-based mode in applications in which worker threads only process event-style asynchronous tasks. For default value, use false.

Exceptions:

IllegalArgumentException		if parallelism less than or equal to zero, or greater than implementation limit
NullPointerException		if the factory is null
SecurityException		if a security manager exists and the caller is not permitted to modify threads because it does not hold java.lang.RuntimePermission ("modifyThread")