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Create an XML document with DOM

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());   } }