There is one nice extension for Java Iterator which allows to go back and forward and even obtain current position. Suppose we have a list and obtained ListIterator: List<String> myList = new ArrayList<String>(); myList.add("str1"); myList.add("str2"); myList.add("str3"); ListIterator<String> listIterator = myList.listIterator(); The idea of iterator is staying between elements of list. hasPrevious & hasNext There are […]