Here you can find the source of getAttributeValue(Node node, String attributeName)
public static Optional<String> getAttributeValue(Node node, String attributeName)
//package com.java2s; /*-/* w w w.java2s .c o m*/ * [LICENSE] * Taskboard * - - - * Copyright (C) 2015 - 2016 Objective Solutions * - - - * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero 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 Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * [/LICENSE] */ import java.util.Optional; import org.w3c.dom.Node; public class Main { public static Optional<String> getAttributeValue(Node node, String attributeName) { Node attributeNode = node.getAttributes().getNamedItem(attributeName); return attributeNode == null ? Optional.empty() : Optional.ofNullable(attributeNode.getNodeValue()); } }