Reverse iteration through ArrayList gives IndexOutOfBoundsException

Question

When I reverse iterate over an ArrayList I am getting a IndexOutOfBoundsException. I tried doing forward iteration and there is no problem. I expect and know that there are five

Answer 1

You can reverse by one line that is

Collections.reverse(list);

ArrayList arrayList = new ArrayList();

arrayList.add("A");
arrayList.add("B");

System.out.println("Before Reverse Order : " + arrayList);

Collections.reverse(arrayList);

System.out.println("After Reverse : " + arrayList);

Output

Before Reverse Order : [A, B]
After Reverse : [B, A]