import javax.xml.bind.JAXBContext; import javax.xml.bind.JAXBException; import javax.xml.bind.annotation.XmlEnum; import javax.xml.bind.annotation.XmlRootElement; public class CardOutput { public static void main(String[] args) throws JAXBException { JAXBContext context = JAXBContext.newInstance(Card.class); context.createMarshaller().marshal(Card.CLUBS, System.out); } } @XmlRootElement @XmlEnum(String.class) enum Card { CLUBS, DIAMONDS, HEARTS, SPADES }