Here you can find the source of saveCompressed(String filename, Object o)
public static void saveCompressed(String filename, Object o) throws IOException
//package com.java2s; /*/* w w w. ja va 2s.c om*/ * Copyright (C) 2008-2015 by Holger Arndt * * This file is part of the Universal Java Matrix Package (UJMP). * See the NOTICE file distributed with this work for additional * information regarding copyright ownership and licensing. * * UJMP 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 2 * of the License, or (at your option) any later version. * * UJMP 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 UJMP; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301 USA */ import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectOutputStream; import java.io.OutputStream; import java.io.Serializable; import java.util.zip.GZIPOutputStream; public class Main { public static void saveCompressed(String filename, Object o) throws IOException { saveCompressed(new File(filename), o); } public static void saveCompressed(File file, Object o) throws IOException { FileOutputStream fos = new FileOutputStream(file); GZIPOutputStream bos = new GZIPOutputStream(fos); serialize(o, bos); bos.close(); fos.close(); } public static void serialize(Object obj, OutputStream outputStream) throws IOException { ObjectOutputStream out = null; try { out = new ObjectOutputStream(outputStream); out.writeObject(obj); } catch (IOException ex) { throw ex; } finally { try { if (out != null) { out.close(); } } catch (IOException ex) { // ignore close exception } } } public static byte[] serialize(Serializable o) throws IOException { ByteArrayOutputStream bos = new ByteArrayOutputStream(); serialize(o, bos); return bos.toByteArray(); } }