Java tutorial
//package com.java2s; /* AVR8 Burn-O-Mat Copyright (C) 2007 Torsten Brischalle 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.DOMException; import org.w3c.dom.NamedNodeMap; import org.w3c.dom.Node; public class Main { public static String getAttr(Node node, String name) throws DOMException { assert node != null; try { NamedNodeMap attributes = node.getAttributes(); if (attributes == null) throw new Exception(""); Node attr = attributes.getNamedItem(name); if (attr == null) throw new Exception(""); String value = attr.getNodeValue(); if (value == null) throw new Exception(""); return value; } catch (Exception e) { throw new DOMException(DOMException.NOT_FOUND_ERR, String.format("attribute %s is missing at node %s", name, node.getNodeName())); } } }