Demo JOOX program

App.java

package app;

import org.joox.JOOX;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

import javax.xml.transform.*;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import static org.joox.JOOX.*;

public class Main {
    public static void main(String... args) throws Exception  {

        Document document = JOOX.builder().newDocument();
        Element root = document.createElement("contacts");
        document.appendChild(root);

        for (String name : new String[]{"John", "Jessica", "Peter"}) {
            $(root).append(
                    $("contact"
                            , $("name", name)
                            , $("active", "true")
                    )
            );
        }

        Transformer transformer = TransformerFactory.newInstance().newTransformer();
        Result output = new StreamResult(System.out);
        Source input = new DOMSource(document);

        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
        transformer.transform(input, output);
    }
}

output.xml

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<contacts>
  <contact>
    <name>John</name>
    <active>true</active>
  </contact>
  <contact>
    <name>Jessica</name>
    <active>true</active>
  </contact>
  <contact>
    <name>Peter</name>
    <active>true</active>
  </contact>
</contacts>