public Object getLastElement(Stack<Object> stack){
        Iterator itr = stack.iterator();
        Object lastElement = itr.next();
        while(itr.hasNext()){
            lastElement = itr.next();
        }
        return lastElement;
    }

    public  void rotateElement(Collection<Object> collection, int rotateStep){
         Stack<Object> stack = new Stack<>();

         Iterator iterate = collection.iterator();
         while(iterate.hasNext()){
             Object element = iterate.next();
             stack.push(element);
         }

         Stack<Object> lastStack = new Stack<>();
          for (int i = 1; i <= rotateStep; i++){
             lastStack.push(getLastElement(stack));
             stack.pop();
         }
         Iterator iterateTwo = stack.iterator();
         while(iterateTwo.hasNext()){
             Object element = iterate.next();
             lastStack.push(element);
         }