import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
 
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
 
class xml {
 
	public static void main(String[] args) throws Exception {

		DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
		DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
 
		Document doc = docBuilder.newDocument();
	
		Element rootElement = doc.createElement("root");
		doc.appendChild(rootElement);
 
		Element child = doc.createElement("child");
		rootElement.appendChild(child);
 

		child.setAttribute("c", "3");
		child.setAttribute("b", "2");
		child.setAttribute("a", "1");
 

		TransformerFactory transformerFactory = TransformerFactory.newInstance();
		Transformer transformer = transformerFactory.newTransformer();
		DOMSource source = new DOMSource(doc);
		StreamResult result = new StreamResult(System.out);

		transformer.transform(source, result);
 
	}
}