Mimic the sortable jquery functionality https://jqueryui.com/sortable/

sortItem.java

  public static <T> List<T> sortItem(List<T> sortList, int moveFrom, int moveTo) {

        if (moveFrom == moveTo) {
            // do nothing
            return null;
        }

        boolean isLastPosition = (sortList.size() == moveTo + 1);

        T currentElement = sortList.get(moveFrom);

        //remove element from list
        sortList.remove(currentElement);

        List<T> sortedList = new ArrayList<>(sortList.size());

        for (int pos = 0; pos < sortList.size(); pos++) {

            if (pos == moveTo) {
                // add item to the willing position
                sortedList.add(currentElement);

                // add the one is supposed to be the next so we won't miss it.
                sortedList.add(sortList.get(pos));
            } else {
                sortedList.add(sortList.get(pos));
            }

        }

        if (isLastPosition) {
            sortedList.add(currentElement);
        }

        return sortedList;

    }