Java tutorial
//package com.java2s; /* * Copyright 2010 Mihai Paraschiv * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import javax.xml.xpath.XPathConstants; import javax.xml.xpath.XPathExpression; import javax.xml.xpath.XPathExpressionException; public class Main { public static double getDouble(Object node, XPathExpression expression) throws XPathExpressionException { return ((Double) expression.evaluate(node, XPathConstants.NUMBER)).doubleValue(); } }