If you want to rewrite a line on console, print a control character \r (carriage return).
List<Integer> myCoords = new ArrayList<Integer>();
myCoords.add(10);
myCoords.add(20);
myCoords.add(30);
myCoords.add(40);
myCoords.add(50);
Iterator<Integer> myListIterator = myCoords.iterator();
while (myListIterator.hasNext()) {
Integer coord = myListIterator.next();
System.out.print("\r");
System.out.print(coord);
Thread.sleep(2000);
}