The difference between Executors.newSingleThreadExecutor().execute(command) and new Thread(command).start();

Question

Well title says it, what is the difference between Executors.newSingleThreadExecutor().execute(command) and new Thread(command).start();

Answer 1

Behaviourally, pretty much nothing.

However, once you have an Executor instance, you can submit multiple tasks to it, and have them executed one after another. You can't do that simply with a raw Thread.