Answer by blacktide for Using Java's Timer to wait for a period of time between loop iterations

The reason why it seems to be looping infinitely, is because the myIterator.next() call doesn't happen until the TimerTask is executed, so myIterator.hasNext() is not updating on each loop iteration. Try moving the myIterator.next() call outside of the TimerTask and inside the loop.

You can also maintain a count of each iteration to schedule each task in 5 second increments, as well as reusing the Timer instance.

I would also recommend using a while loop instead of a do-while loop, unless you're certain that your iterator will always have at least one element, or else you may get a NoSuchElementException.

Here is a working example:

List<String> list = Arrays.asList("a", "b", "c");Iterator<String> iterator = list.iterator();int i = 0;Timer timer = new Timer();while(iterator.hasNext()) {    String value = iterator.next();    TimerTask task = new TimerTask() {        @Override        public void run() {            System.out.println(value);        }    };    timer.schedule(task, 5000L * i++);}

Which outputs the following:

a // after 0 secondsb // after 5 secondsc // after 10 seconds