The code needed to build an XML string properly in Java... Ugh!

xmlwriter.java

import java.io.*;
import org.w3c.dom.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;

public class XMLWriter {

    public static void main (String args[]) {
        new XMLWriter();
    }

    public XMLWriter() {
		String comment = "This is my comment";
		String title = "This is the title";
		String url = "http://mysite.com";
		String image = "http://mysite.com/image.png";
		String visibility = "anyone";
		
        try {
            DocumentBuilderFactory dbfac = DocumentBuilderFactory.newInstance();
            DocumentBuilder docBuilder = dbfac.newDocumentBuilder();
            Document doc = docBuilder.newDocument();

			Element root = doc.createElement("share");
			doc.appendChild(root);
			
			Element comment_node = doc.createElement("comment");
			comment_node.appendChild(doc.createTextNode(comment));
			root.appendChild(comment_node);
			
			Element content_node = doc.createElement("content");
			root.appendChild(content_node);
			
			Element title_node = doc.createElement("title");
			title_node.appendChild(doc.createTextNode(title));
			content_node.appendChild(title_node);
			
			Element url_node = doc.createElement("submitted-url");
			url_node.appendChild(doc.createTextNode(url));
			content_node.appendChild(url_node);
			
			Element image_node = doc.createElement("submitted-image-url");
			image_node.appendChild(doc.createTextNode(image));
			content_node.appendChild(image_node);
			
			Element visibility_node = doc.createElement("visibility");
			root.appendChild(visibility_node);
			
			Element code_node = doc.createElement("code");
			code_node.appendChild(doc.createTextNode(visibility));
			visibility_node.appendChild(code_node);

            TransformerFactory transfac = TransformerFactory.newInstance();
            Transformer trans = transfac.newTransformer();
            trans.setOutputProperty(OutputKeys.INDENT, "yes");

            StringWriter sw = new StringWriter();
            StreamResult result = new StreamResult(sw);
            DOMSource source = new DOMSource(doc);
            trans.transform(source, result);
            String xmlString = sw.toString();

            System.out.println("Here's the xml:\n\n" + xmlString);

        } catch (Exception e) {
            System.out.println(e);
        }
    }
}