Java tutorial
//package com.java2s; /* This file is part of GALE (Generic Adaptation Language and Engine). GALE is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. GALE 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with GALE. If not, see <http://www.gnu.org/licenses/>. */ import java.io.File; import java.io.FileWriter; import java.io.IOException; import java.io.PrintWriter; import java.util.Enumeration; import java.util.Hashtable; public class Main { /** * Saves an index (Hashtable) to a file. * * @param root_ * The file where the index is stored in. * @param index * The indextable. * @exception IOException * If an internal error prevents the file from being written. */ public static void saveIndex(File root_, String name, Hashtable index) throws IOException { File indexfile = new File(root_, name); PrintWriter out = new PrintWriter(new FileWriter(indexfile)); Enumeration keys = index.keys(); String key = null; while (keys.hasMoreElements()) { key = (String) keys.nextElement(); out.println(key); out.println((Long) index.get(key)); } out.close(); } /** * Saves an index (Hashtable) to a file. * * @param root_ * The file where the index is stored in. * @param index * The indextable. * @exception IOException * If an internal error prevents the file from being written. */ public static void saveIndex(File root_, Hashtable index) throws IOException { saveIndex(root_, "index", index); } }