Here you can find the source of copyStream(@Nonnull InputStream in, @Nonnull OutputStream out)
public static void copyStream(@Nonnull InputStream in, @Nonnull OutputStream out) throws IOException
//package com.java2s; /*/*from w ww . j av a 2s . co m*/ * The MIT License * * Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import java.io.*; import javax.annotation.Nonnull; public class Main { public static void copyStream(@Nonnull InputStream in, @Nonnull OutputStream out) throws IOException { byte[] buf = new byte[8192]; int len; while ((len = in.read(buf)) >= 0) out.write(buf, 0, len); } public static void copyStream(@Nonnull Reader in, @Nonnull Writer out) throws IOException { char[] buf = new char[8192]; int len; while ((len = in.read(buf)) > 0) out.write(buf, 0, len); } }