Why doesn't ScheduledExecutorService spawn threads as needed?

Question

In my application I use ScheduledExecutorService, but only one thread is spawned to handle the scheduled tasks. Is this because ScheduledExecutorService does not spawn thre

Answer 1

There is only one thread because you create the thread pool with Executors.newScheduledThreadPool(1), which means that the thread pool contains only 1 thread. If you want 10 threads, pass 10 as argument. Note that the documentation of ScheduledThreadPoolExecutor, which is what this method returns, explicitly says that the thread pool has a fixed size.