public class ListNode {

    private Object data;
    private ListNode next;

    public ListNode(Object data, ListNode next) {
        this.data = data;
        this.next = next;
    }

    public void setData(Object data) {
        this.data = data;
    }

    public Object getData() {
        return data;
    }

    public void setNext(ListNode next) {
        this.next = next;
    }

    public ListNode getNext() {
        return next;
    }

    public static int search(ListNode n, Object o) {
        ListNode temp;
        int i = 0;
        for ( temp = n; temp != null; temp = temp.getNext() ) {
            if (temp.getData().equals(o))
                return i;
            i++;
        }
    }

}