Indent-amount - has no affect

Question

Hi,
i am trying to create an xml-file looks nice and readable.
The code:
tf.setOutputProperty(OutputKeys.INDENT, "yes");works fine, and the file is no longer on one long line, but the code
tf.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");doesn�t work on the computer that has no internet access. Is that how it should work? Is there another way to force the indent in a good way.
package xml;
import java.io.StringWriter;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
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.Document;
import org.w3c.dom.Element;
public class AnotherCreateXml {
     public static void main (String args [])
          try {
               DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance ();
               DocumentBuilder db = dbf.newDocumentBuilder ();
               Document doc = db.newDocument ();
               Element root = doc.createElement ("root");
               Element row = doc.createElement("row");
               Element ele = doc.createElement("item");
               ele.setAttribute("name", "girl");
               ele.appendChild (doc.createTextNode ("12345"));
               row.appendChild(ele);
               root.appendChild(row);
               doc.appendChild(root);
               TransformerFactory tmf = TransformerFactory.newInstance();
               Transformer tf = tmf.newTransformer();
               tf.setOutputProperty(OutputKeys.INDENT, "yes");
               tf.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
               DOMSource source = new DOMSource(doc);
               StreamResult result = new StreamResult (new StringWriter());
               tf.transform(source, result);
               System.out.println(result.getWriter().toString());
          } catch (TransformerConfigurationException e) {
               e.printStackTrace();
          } catch (TransformerException e) {
               e.printStackTrace();
          } catch (ParserConfigurationException e) {
               e.printStackTrace();
     }

Answer 1

Insert this line into your code before the one that creates the Transformer object ("tf"):tmf.setAttribute("indent-number", "2");