code: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   * 
   *      http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.commons.io.output;
   
  import java.io.IOException;
  import java.io.OutputStream;
  
  /**
   * This OutputStream writes all data to the famous <b>/dev/null</b>.
   * <p>
   * This output stream has no destination (file/socket etc.) and all
   * bytes written to it are ignored and lost.
   * 
   * @author Jeremias Maerki
   * @version $Id: NullOutputStream.java 659817 2008-05-24 13:23:10Z niallp $
   */
  public class NullOutputStream extends OutputStream {
      
      /**
       * A singleton.
       */
      public static final NullOutputStream NULL_OUTPUT_STREAM = new NullOutputStream();
  
      /**
       * Does nothing - output to <code>/dev/null</code>.
       * @param b The bytes to write
       * @param off The start offset
       * @param len The number of bytes to write
       */
      @Override
      public void write(byte[] b, int off, int len) {
          //to /dev/null
      }
  
      /**
       * Does nothing - output to <code>/dev/null</code>.
       * @param b The byte to write
       */
      @Override
      public void write(int b) {
          //to /dev/null
      }
  
      /**
       * Does nothing - output to <code>/dev/null</code>.
       * @param b The bytes to write
       * @throws IOException never
       */
      @Override
      public void write(byte[] b) throws IOException {
          //to /dev/null
      }
  
  }
  