import java.io.File;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Comment;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.EntityReference;
import org.w3c.dom.Text;
public class Main {
public static void main(String[] argv) throws Exception {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(true);
factory.setExpandEntityReferences(false);
Document doc = factory.newDocumentBuilder().parse(new File("filename"));
Element root = doc.getDocumentElement();
EntityReference eref = (EntityReference) root.getFirstChild();
Comment comment = (Comment) eref.getFirstChild();
Element elem = (Element) eref.getFirstChild().getNextSibling();
Text text = (Text) eref.getLastChild();
}
}