import java.io.StringWriter; 
 
import javax.xml.parsers.DocumentBuilder; 
import javax.xml.parsers.DocumentBuilderFactory; 
import javax.xml.transform.OutputKeys; 
import javax.xml.transform.Transformer; 
import javax.xml.transform.TransformerFactory; 
import javax.xml.transform.dom.DOMSource; 
import javax.xml.transform.stream.StreamResult; 
 
import org.w3c.dom.DOMImplementation; 
import org.w3c.dom.Document; 
import org.w3c.dom.Element; 
 
public class Main { 
  public static void main(String[] argv) throws Exception { 
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); 
    DocumentBuilder builder = factory.newDocumentBuilder(); 
    DOMImplementation impl = builder.getDOMImplementation(); 
    Document doc = impl.createDocument(null, null, null); 
    Element e1 = doc.createElement("api"); 
    doc.appendChild(e1); 
    Element e2 = doc.createElement("java"); 
    e1.appendChild(e2); 
 
    e2.setAttribute("url", "http://www.domain.com"); 
    DOMSource domSource = new DOMSource(doc); 
    Transformer transformer = TransformerFactory.newInstance().newTransformer(); 
    transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes"); 
    transformer.setOutputProperty(OutputKeys.METHOD, "xml"); 
    transformer.setOutputProperty(OutputKeys.ENCODING, "ISO-8859-1"); 
    transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4"); 
    transformer.setOutputProperty(OutputKeys.INDENT, "yes"); 
    StringWriter sw = new StringWriter(); 
    StreamResult sr = new StreamResult(sw); 
    transformer.transform(domSource, sr); 
    System.out.println(sw.toString()); 
  } 
} 
 
    
     
     
     
     
     
     
  
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