Splitting String and put it on int array

Question

I have to input a string with numbers ex: 1,2,3,4,5. That\'s a sample of the input, then I have to put that in an array of INT so I can sort it but is not working the way it

Answer 1

List stringList = new ArrayList(Arrays.asList(arr.split(",")));
List intList = new ArrayList();
for (String s : stringList) 
   intList.add(Integer.valueOf(s));