Best Loop Idiom for special casing the last element

Question

I run into this case a lot of times when doing simple text processing and print statements where I am looping over a collection and I want to special case the last element (

Answer 1

It can be achieved using Java 8 lambda and Collectors.joining() as -

List items = Arrays.asList("dog", "cat", "bat");
String result = items.stream().collect(Collectors.joining(", ", "[", "]"));
System.out.println(result);