get element names from unmarshalled object class

after unmarshalling my xml i got a class like this

public static class OrderDetails {

        @XmlElement(name = "InitiatorRole", required = true)
        protected String initiatorRole;
        @XmlElement(name = "OriginatorId", required = true)
        protected String originatorId;
        public String getInitiatorRole() {
            return initiatorRole;
        }
        public void setInitiatorRole(String value) {
            this.initiatorRole = value;
        }
        public String getOriginatorId() {
            return originatorId;
        }
        public void setOriginatorId(String value) {
            this.originatorId = value;
        }
     }

now i want to print xmlelement names from this class InitiatorRole OriginatorId how to do this..?