Java Utililty Methods XML First Child Element

List of utility methods to do XML First Child Element

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Description

The list of methods to do XML First Child Element are organized into topic(s).

Method

ElementgetFirstChildElementNS(Node parent, String[][] elemNames)
Finds and returns the first child node with the given qualified name. 
Node child = parent.getFirstChild();
while (child != null) {
    if (child.getNodeType() == Node.ELEMENT_NODE) {
        for (int i = 0; i < elemNames.length; i++) {
            String uri = child.getNamespaceURI();
            if (uri != null && uri.equals(elemNames[i][0])
                    && child.getLocalName().equals(elemNames[i][1])) {
                return (Element) child;
...
ElementgetFirstChildElementOfName(@Nonnull final Node aStartNode, @Nullable final String sName)
Search all child nodes of the given for the first element that has the specified tag name. 
final NodeList aNodeList = aStartNode.getChildNodes();
final int nLen = aNodeList.getLength();
for (int i = 0; i < nLen; ++i) {
    final Node aNode = aNodeList.item(i);
    if (aNode.getNodeType() == Node.ELEMENT_NODE) {
        final Element aElement = (Element) aNode;
        if (aElement.getTagName().equals(sName))
            return aElement;
...
CollectiongetFirstChildElementsByTagName(Node contextNode, String elementName)
Returns list of the first child element retrieved by tag name from the parent node and null otherwise. 
Collection<Element> elements = null;
Element result = null;
if (contextNode.getNodeType() == Node.DOCUMENT_NODE) {
    result = ((Document) contextNode).getDocumentElement();
    if (!result.getNodeName().equals(elementName)) {
        result = null;
} else {
...
CollectiongetFirstChildElementsByTagName(Node contextNode, String elementName)
Returns list of the first child element retrieved by tag name from the parent node and null otherwise. 
Collection<Element> elements = null;
Element result = null;
if (contextNode.getNodeType() == Node.DOCUMENT_NODE) {
    result = ((Document) contextNode).getDocumentElement();
    if (!result.getNodeName().equals(elementName)) {
        result = null;
} else {
...
ElementgetFirstChildElementWithName(Element elem, String name)
get First Child Element With Name 
if (elem == null) {
    return null;
for (Element e = getFirstChildElement(elem); e != null; e = getNextSiblingElement(e)) {
    if (e.getTagName().equals(name)) {
        return e;
return null;
ElementgetFirstChildElmtByTag(String aTagName)
get First Child Elmt By Tag 
return getFirstChildElmtByTag(this.getRootElmt(), aTagName);
ElementgetFirstChildElmtByTagAndAttribut(Node aNode, String aTagName, String aAttrId, String aAttrValue)
get First Child Elmt By Tag And Attribut 
if (aNode == null || aTagName == null || aAttrId == null || aAttrValue == null) {
    return null;
Node wNode = aNode.getFirstChild();
if (wNode == null || (wNode.getNodeType() == Node.ELEMENT_NODE && wNode.getNodeName().equals(aTagName)
        && aAttrValue.equals(((Element) wNode).getAttribute(aAttrId)))) {
    return (Element) wNode;
} else {
...
ElementgetFirstChildNamed(Element elem, String childName)
get First Child Named 
NodeList children = elem.getChildNodes();
final int length = children.getLength();
for (int index = 0; index < length; index++) {
    Node node = children.item(index);
    if ((node instanceof Element) && ((Element) node).getTagName().equals(childName)) {
        return (Element) node;
return null;
NodegetFirstChildNamed(Node node, String name)
Returns the first child of node that has the given name, or null. 
return getFirstSiblingNamed(node.getFirstChild(), name);
NodegetFirstChildNode(Node parentNode, String childNodeName)
Returns the first child node of parentNode with the given node name or null if no such child node exists. 
NodeList nodes = parentNode.getChildNodes();
for (int i = 0; i < nodes.getLength(); i++) {
    Node n = nodes.item(i);
    if (n.getNodeType() == Node.TEXT_NODE)
        continue;
    if (n.getNodeName().equals(childNodeName))
        return n;
return null;