> In the .Net world there's the ThreadPool class to manage the single process-wide thread-pool, and the Task class to enqueue and orchestrate concurrent jobs (it uses ThreadPool and almost completely abstracts away the thread management). > (You could write your own thread-pool, of course, but for most code that wouldn't make sense.)

Java had thread pools and tasks since 2004 (https://docs.oracle.com/javase/1.5.0/docs/api/java/util/conc...). For typical Java programs, no one is writing their own thread pool functionality as far as I know.