The ExecutorService class provides another version of the invokeAll() method:
- invokeAll(Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit): This method executes all the tasks and returns the result of their execution when all of them are finished, that is, if they finish before the given timeout has passed. The TimeUnit class is an enumeration with the following constants: DAYS, HOURS, MICROSECONDS, MILLISECONDS, MINUTES, NANOSECONDS, and SECONDS.
