public class RingList {
    static Node zero = null;

    public static void main(String[] args) {
        add(new Node("one", "1"));
        add(new Node("two", "2"));
        add(new Node("three", "3"));
        add(new Node("four", "4"));
        add(new Node("five", "5"));

        for (int i = 0; i < 10; i++) {
            zero = zero.n;
            System.out.println("i=" + i + "   " + zero.toString());
        }
    }

    private static void add(Node node) {
        if (zero == null) {
            zero = node;
            node.n = zero;
        }
        node.n = zero.n;
        zero.n = node;
        zero = node;
    }
    
    static class Node {
        Node n;
        String word, meaning;

        public Node(String word, String meaning) {
            this.word = word;
            this.meaning = meaning;
        }

        @Override
        public String toString() {
            return word + "#" + meaning;
        }
    }
}

static class Node {
        Node next, prev;
        String word, meaning;
}