Java tutorial
import java.io.File; /** * BeehiveZ is a business process model and instance management system. * Copyright (C) 2011 * Institute of Information System and Engineering, School of Software, Tsinghua University, * Beijing, China * * Contact: jintao05@gmail.com * * This program is a 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 with the version of 2. * * 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, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /** * @author Tao Jin * */ public class Util { public static long getFileSizeInBytes(String fileName) { long ret = 0; File f = new File(fileName); if (f.isFile()) { return f.length(); } else if (f.isDirectory()) { File[] contents = f.listFiles(); for (int i = 0; i < contents.length; i++) { if (contents[i].isFile()) { ret += contents[i].length(); } else if (contents[i].isDirectory()) ret += getFileSizeInBytes(contents[i].getPath()); } } return ret; } }