Here you can find the source of toLong(Number n)
public static Long toLong(Number n)
//package com.java2s; /******************************************************************************* * Copyright (c) 2010 BSI Business Systems Integration AG. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors://from w ww . j a v a2 s. c o m * BSI Business Systems Integration AG - initial API and implementation ******************************************************************************/ public class Main { public static Long toLong(Number n) { if (n == null) { return null; } return n.longValue(); } }