content: /*
   * Copyright (c) 1994, 2004, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
   *
   * This code 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
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  package java.io;
  
  /**
   * This abstract class is the superclass of all classes representing
   * an output stream of bytes. An output stream accepts output bytes
   * and sends them to some sink.
   * <p>
   * Applications that need to define a subclass of
   * <code>OutputStream</code> must always provide at least a method
   * that writes one byte of output.
   *
   * @author  Arthur van Hoff
   * @see     BufferedOutputStream
   * @see     ByteArrayOutputStream
   * @see     DataOutputStream
   * @see     FilterOutputStream
   * @see     InputStream
   * @see     OutputStream#write(int)
   * @since   JDK1.0
   */
  public abstract class OutputStream implements Closeable, Flushable {
      /**
       * Writes the specified byte to this output stream. The general
       * contract for <code>write</code> is that one byte is written
       * to the output stream. The byte to be written is the eight
       * low-order bits of the argument <code>b</code>. The 24
       * high-order bits of <code>b</code> are ignored.
       * <p>
       * Subclasses of <code>OutputStream</code> must provide an
       * implementation for this method.
       *
       * @param      b   the <code>byte</code>.
       * @exception  IOException  if an I/O error occurs. In particular,
       *             an <code>IOException</code> may be thrown if the
       *             output stream has been closed.
       */
      public abstract void write(int b) throws IOException;
  
      /**
       * Writes <code>b.length</code> bytes from the specified byte array
       * to this output stream. The general contract for <code>write(b)</code>
       * is that it should have exactly the same effect as the call
       * <code>write(b, 0, b.length)</code>.
       *
       * @param      b   the data.
       * @exception  IOException  if an I/O error occurs.
       * @see        OutputStream#write(byte[], int, int)
       */
      public void write(byte b[]) throws IOException {
          write(b, 0, b.length);
      }
  
      /**
       * Writes <code>len</code> bytes from the specified byte array
       * starting at offset <code>off</code> to this output stream.
       * The general contract for <code>write(b, off, len)</code> is that
       * some of the bytes in the array <code>b</code> are written to the
       * output stream in order; element <code>b[off]</code> is the first
       * byte written and <code>b[off+len-1]</code> is the last byte written
       * by this operation.
       * <p>
       * The <code>write</code> method of <code>OutputStream</code> calls
       * the write method of one argument on each of the bytes to be
       * written out. Subclasses are encouraged to override this method and
       * provide a more efficient implementation.
       * <p>
       * If <code>b</code> is <code>null</code>, a
       * <code>NullPointerException</code> is thrown.
       * <p>
       * If <code>off</code> is negative, or <code>len</code> is negative, or
       * <code>off+len</code> is greater than the length of the array
       * <code>b</code>, then an <tt>IndexOutOfBoundsException</tt> is thrown.
       *
       * @param      b     the data.
       * @param      off   the start offset in the data.
       * @param      len   the number of bytes to write.
       * @exception  IOException  if an I/O error occurs. In particular,
       *             an <code>IOException</code> is thrown if the output
       *             stream is closed.
       */
      public void write(byte b[], int off, int len) throws IOException {
          if (b == null) {
              throw new NullPointerException();
          } else if ((off < 0) || (off > b.length) || (len < 0) ||
                     ((off + len) > b.length) || ((off + len) < 0)) {
              throw new IndexOutOfBoundsException();
          } else if (len == 0) {
              return;
          }
          for (int i = 0 ; i < len ; i++) {
              write(b[off + i]);
          }
      }
  
      /**
       * Flushes this output stream and forces any buffered output bytes
       * to be written out. The general contract of <code>flush</code> is
       * that calling it is an indication that, if any bytes previously
       * written have been buffered by the implementation of the output
       * stream, such bytes should immediately be written to their
       * intended destination.
       * <p>
       * If the intended destination of this stream is an abstraction provided by
       * the underlying operating system, for example a file, then flushing the
       * stream guarantees only that bytes previously written to the stream are
       * passed to the operating system for writing; it does not guarantee that
       * they are actually written to a physical device such as a disk drive.
       * <p>
       * The <code>flush</code> method of <code>OutputStream</code> does nothing.
       *
       * @exception  IOException  if an I/O error occurs.
       */
      public void flush() throws IOException {
      }
  
      /**
       * Closes this output stream and releases any system resources
       * associated with this stream. The general contract of <code>close</code>
       * is that it closes the output stream. A closed stream cannot perform
       * output operations and cannot be reopened.
       * <p>
       * The <code>close</code> method of <code>OutputStream</code> does nothing.
       *
       * @exception  IOException  if an I/O error occurs.
       */
      public void close() throws IOException {
      }
  
  }
  