public class Klassenadapter implements Seq{

        private Struc c;
        int i;

        public Klassenadapter(Struc c) {
            this.c = c;
            this.i = -1;
        }

        @Override
        public boolean hasNext() {
            return i+1 < c.size();
        }

        @Override
        public int getNext() {
            int result = 0;
            try {
                if (this.hasNext()) result = c.get(++i);
            } catch (Exception e) {
                e.printStackTrace();
            }
            return result;
        }

    }