An OutputStream which relays all data written into it into a list of given OutputStreams : Stream « File Input Output « Java

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Java » File Input Output » StreamScreenshots 
An OutputStream which relays all data written into it into a list of given OutputStreams
   
/**
 * The utillib library.
 * More information is available at http://www.jinchess.com/.
 * Copyright (C) 2002 Alexander Maryanovsky.
 * All rights reserved.
 *
 * The utillib library 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.
 *
 * The utillib library 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 utillib library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */


import java.io.OutputStream;
import java.io.IOException;


/**
 * An <code>OutputStream</code> which relays all data written into it into a
 * list of given <code>OutputStreams</code>.
 */

public class MultiOutputStream extends OutputStream{



  /**
   * An array containing the OutputStreams we're relaying data to.
   */

  private final OutputStream [] streams;



  /**
   * Creates a new <code>MultiOutputStream</code> which relays data to the
   * specified two <code>OutputStreams</code>. Any <code>null</code> values
   * will be silently ignored.
   */

  public MultiOutputStream(OutputStream out1, OutputStream out2){
    this(new OutputStream[]{out1, out2});
  }



  /**
   * Creates a new <code>MultiOutputStream</code> which relays data to the
   * specified <code>OutputStreams</code>. Any <code>null</code> items in the
   * array will be silently ignored.
   */

  public MultiOutputStream(OutputStream [] streams){
    if (streams == null)
      throw new IllegalArgumentException("Specified array may not be null");

    int count = 0;
    for (int i = 0; i < streams.length; i++)
      if (streams[i!= null)
        count++;

    this.streams = new OutputStream[count];
    count = 0;
    for (int i = 0; i < streams.length; i++){
      OutputStream stream = streams[i];
      if (stream != null)
        this.streams[count++= stream;
    }
  }



  /**
   * Closes all the underlying <code>OutputStreams</code>.
   */

  public void close() throws IOException{
    for (int i = 0; i < streams.length; i++)
      streams[i].close();
  }



  /**
   * Flushes all the underlying <code>OutputStreams</code>.
   */

  public void flush() throws IOException{
    for (int i = 0; i < streams.length; i++)
      streams[i].flush();
  }




  /**
   * Writes the specified <code>byte</code> into the underlying
   * <code>OutputStreams</code>.
   */
  
  public void write(int bthrows IOException{
    for (int i = 0; i < streams.length; i++)
      streams[i].write(b);
  }




  /**
   * Writes the specified amount of bytes from the given byte array starting
   * at the specified offset to the underlying <code>OutputStreams</code>.
   */

  public void write(byte [] arr, int offset, int lengththrows IOException{
    for (int i = 0; i < streams.length; i++)
      streams[i].write(arr, offset, length);
  }

}

   
    
    
  
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9. Count the number of bytes read through the stream
10. Count OutputStream
11. File utilities for file read and write
12. An InputStream class that terminates the stream when it encounters a particular byte sequence.
13. An InputStream that implements HTTP/1.1 chunking
14. Utility code for dealing with different endian systems
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