How to shut down all Executors when quitting an application?

Question

According to Brian Goetz\'s Java Concurrency in Practice JVM can\'t exit until all the (nondaemon) threads have terminated, so failing to shut down an Executor could pre

Answer 1

You can also provide an implementation of ThreadFactory that marks created threads as daemon threads. I prefer a clean shutdown mechanism (with lifecycle methods) but there are cases where you don't need guarantees about the state/completion of uncompleted tasks when this can be appropriate.