Here you can find the source of createDocument()
public static Document createDocument()
//package com.java2s; /*/*from w w w.j a va 2 s .com*/ * (c) Copyright 2007-2014 by Volker Bergmann. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, is permitted under the terms of the * GNU General Public License. * * For redistributing this software or a derivative work under a license other * than the GPL-compatible Free Software License as defined by the Free * Software Foundation or approved by OSI, you must first obtain a commercial * license to this software product from Volker Bergmann. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS, * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import org.w3c.dom.Document; import org.w3c.dom.Element; public class Main { private static final String DOCUMENT_BUILDER_FACTORY_IMPL = "org.apache.xerces.jaxp.DocumentBuilderFactoryImpl"; public static Document createDocument(String rootElementName) { Document document = createDocument(); Element rootElement = document.createElement(rootElementName); document.appendChild(rootElement); return document; } public static Document createDocument() { try { DocumentBuilder documentBuilder = createDocumentBuilderFactory(null).newDocumentBuilder(); return documentBuilder.newDocument(); } catch (ParserConfigurationException e) { throw new RuntimeException(e); } } public static DocumentBuilderFactory createDocumentBuilderFactory(ClassLoader classLoader) { if (classLoader == null) classLoader = Thread.currentThread().getContextClassLoader(); return DocumentBuilderFactory.newInstance(DOCUMENT_BUILDER_FACTORY_IMPL, classLoader); } }