Question

What’s the shortest way to get an Iterator over a range of Integers in Java? In other words, implement the following:

/**  * Returns an Iterator over the integers from first to first+count. */ Iterator<Integer> iterator(Integer first, Integer count); 

Something like

(first..first+count).iterator() 

Answer 1

Straight-forward implementation of your homework:

List<Integer> ints = new ArrayList<Integer>(); for (int i = 0; i < count; i++) {     ints.add(first + i); }