Here you can find the source of getElementsByTagName(Node node, String tagName)
public static ArrayList<Element> getElementsByTagName(Node node, String tagName)
//package com.java2s; //License from project: Apache License import java.util.ArrayList; import org.w3c.dom.Element; import org.w3c.dom.Node; public class Main { public static ArrayList<Element> getElementsByTagName(Node node, String tagName) { ArrayList<Element> elements = new ArrayList<Element>(); for (int i = 0; i < node.getChildNodes().getLength(); i++) { Node n = node.getChildNodes().item(i); if (n.getNodeType() == Node.ELEMENT_NODE && n.getNodeName().equals(tagName)) { elements.add((Element) n); }/*from w ww . ja v a2 s . com*/ } return elements; } }