Output ArrayList to String without [,] (brackets) appearing

Question

OK, so I have an ArrayList that I need to return as a String. Right now I am using this approach:

List customers = new ArrayList<>();
L         


        

Answer 1

Java 8 version

List intList = new ArrayList();
intList.add(1);
intList.add(2);
intList.add(4);
System.out.println(intList.stream().map(i -> i.toString()).collect(Collectors.joining(",")));

Output: 1,2,4