Difference between TimerTask and Executors.newScheduledThreadPool(1)

Question

I need to schedule some work to be done in the future. I can do it in 2 ways:

1. Create a TimerTask and execute timer.schedule(...);

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Answer 1

The biggest difference is that the Timer will schedule all of its tasks on a single background thread. The ExecutorService, on the other hand, will create new threads (if necessary) to run the tasks (up to the size of the pool you specify, at which point tasks will be queued.)