Here you can find the source of getAttribute(Element e, String name)
public static String getAttribute(Element e, String name)
//package com.java2s; /*/*from w ww . j a va 2 s . c om*/ * ==================== * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright 2008-2009 Sun Microsystems, Inc. All rights reserved. * * The contents of this file are subject to the terms of the Common Development * and Distribution License("CDDL") (the "License"). You may not use this file * except in compliance with the License. * * You can obtain a copy of the License at * http://opensource.org/licenses/cddl1.php * See the License for the specific language governing permissions and limitations * under the License. * * When distributing the Covered Code, include this CDDL Header Notice in each file * and include the License file at http://opensource.org/licenses/cddl1.php. * If applicable, add the following below this CDDL Header, with the fields * enclosed by brackets [] replaced by your own identifying information: * "Portions Copyrighted [year] [name of copyright owner]" * ==================== */ import org.w3c.dom.Element; public class Main { /** * Return the value of an attribute on an element. * <p/> * The DOM getAttribute method returns an empty string if the attribute * doesn't exist. Here, we detect this and return null. */ public static String getAttribute(Element e, String name) { String value = e.getAttribute(name); if (value != null && value.length() == 0) { value = null; } return value; } }