code: public static List getChildElementsByName(Element parent, String name)
      {
          List elements = new ArrayList();
  
          NodeList children = parent.getChildNodes();
  
          for(int i = 0; i < children.getLength(); i++) {
              Node node = children.item(i);
              if(node.getNodeType() == Node.ELEMENT_NODE) {
                  Element element = (Element) node;
                  if(element.getTagName().equals(name)) {
                      elements.add(element);
                  }
              }
          }
  
          return elements;
      }
docs: <p>Returns a list of child elements with the given
  name. Returns an empty list if there are no such child
  elements.</p>
  
  @param parent parent element
  @param name name of the child element
  @return child elements