Here you can find the source of getFirstElementByTagName(Document document, String tag)
public static Element getFirstElementByTagName(Document document, String tag)
//package com.java2s; /*/*from ww w .j ava 2 s . c o m*/ * Copyright (C) 2010 Just Objects B.V. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import org.w3c.dom.*; public class Main { public static Element getFirstElementByTagName(Document document, String tag) { // Get all elements matching the tagname NodeList nodeList = document.getElementsByTagName(tag); if (nodeList == null) { p("no list of elements with tag=" + tag); return null; } // Get the first if any. Element element = (Element) nodeList.item(0); if (element == null) { p("no element for tag=" + tag); return null; } return element; } public static void p(String s) { // System.out.println("DOMUtil: "+s); } }