Java Document .createEntityReference (String name)

EntityReference createEntityReference(String name)     throws DOMException

import java.io.StringReader;
/*from   w  ww . j  a v  a2s. c om*/
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.EntityReference;
import org.xml.sax.InputSource;

public class Main {
  public static void main(String args[]) throws Exception{
    DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = builderFactory.newDocumentBuilder();  // Create the parser
    Document xmlDoc = builder.parse(new InputSource(new StringReader(xmlString)));

    EntityReference ref = xmlDoc.createEntityReference("name") ;
    
  }
  static String xmlString ="<?xml version=\"1.0\"?>" +
      "  <address id='asdf'>" +
      "    <buildingnumber> 29 </buildingnumber>" +
      "    <street> South Street</street>" +
      "    <city>Vancouver</city>" +
      "" +
      "    <state>BC</state>" +
      "    <zip>V6V 4U7</zip>" +
      "  </address>";
}