Here you can find the source of copyStream(InputStream in, OutputStream out)
public static void copyStream(InputStream in, OutputStream out) throws IOException
//package com.java2s; /*//from ww w.j a v a 2 s .co m This file is part of the BlueJ program. Copyright (C) 1999-2009,2014 Michael Kolling and John Rosenberg This program is 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; either version 2 of the License, or (at your option) any later version. 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. This file is subject to the Classpath exception as provided in the LICENSE.txt file that accompanied this code. */ import java.io.*; public class Main { /** * Copy stream 'in' to stream 'out'. */ public static void copyStream(InputStream in, OutputStream out) throws IOException { for (int c; (c = in.read()) != -1;) out.write(c); } }