Java Utililty Methods XML Child Get by Name

List of utility methods to do XML Child Get by Name

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Description

The list of methods to do XML Child Get by Name are organized into topic(s).

Method

ElementgetChildByTagName(Element element, String tag)
get Child By Tag Name 
NodeList children = element.getChildNodes();
Node child;
for (int index = 0; index < children.getLength(); index++) {
    child = children.item(index);
    if ((child instanceof Element) && ((Element) child).getTagName().equals(tag)) {
        return (Element) child;
return null;
ElementgetChildByTagName(Element element, String tagName)
get Child By Tag Name 
Element result = null;
NodeList childNodes = element.getChildNodes();
for (int i = 0; i < childNodes.getLength(); i++) {
    Node n = childNodes.item(i);
    if (!(n instanceof Element)) {
        continue;
    if (((Element) n).getTagName().equals(tagName)) {
...
ElementgetChildByTagName(Node parent, String tagname)
Iterate over the children of a given node and return the first node that has a specific name. 
if (parent == null) {
    return null;
NodeList childList = parent.getChildNodes();
final int len = childList.getLength();
for (int i = 0; i < len; i++) {
    Node child = childList.item(i);
    if (child != null && child.getNodeType() == Node.ELEMENT_NODE && child.getNodeName().equals(tagname)) {
...
StringgetChildData(Element e, String tag)
get Child Data 
NodeList children = e.getElementsByTagName(tag);
if (children == null || children.getLength() == 0)
    return null;
return getChildData((Element) children.item(0));
OptionalgetChildDouble(final Element parent, final String name)
Given a parent element, locate double value of a child node. 
final Element child = getChildElement(parent, name);
if (child == null)
    return Optional.empty();
try {
    return Optional.of(Double.valueOf(getString(child)));
} catch (NumberFormatException ex) {
    throw new Exception("Expected double for <" + name + ">", ex);
doublegetChildDoubleByName(Node node, String nodeName, double errValue)
get Child Double By Name 
String s = getChildStringByName(node, nodeName, "");
if (s.length() > 0)
    return Double.parseDouble(s);
return errValue;
ElementgetChildElemByTagName(Element parent, String tagName)
returns first child element with fitting tag name. 
NodeList children = parent.getChildNodes();
for (int i = 0; i < children.getLength(); ++i) {
    if (children.item(i).getNodeType() == Node.ELEMENT_NODE) {
        Element child = (Element) children.item(i);
        if (child.getTagName().equals(tagName))
            return child;
return null;
ElementgetChildElement(Element currentNode, String nsURI, String localName)
get Child Element 
return (Element) getChildElementList(currentNode, nsURI, localName).item(0);
ElementgetChildElement(Element el, String tagName)
get Child Element 
if (el == null)
    return null;
NodeList list = el.getElementsByTagName(tagName);
if (list != null && list.getLength() > 0) {
    return (Element) list.item(0);
return null;
ElementgetChildElement(Element el, String tagName)
Gets the child element. 
if (el == null) {
    return null;
NodeList list = el.getElementsByTagName(tagName);
if (list != null && list.getLength() > 0) {
    return (Element) list.item(0);
return null;
...