Reads an array of bytes from the given ByteBuffer - Java java.nio

Java examples for java.nio:ByteBuffer Read

  1. HOME
  2. Java
  3. java.nio
  4. ByteBuffer Read

Description

Reads an array of bytes from the given ByteBuffer

Demo Code

/*/*from   ww  w . ja  v a  2s .  c o  m*/
Copyright (c) 2005 Health Market Science, Inc.

This 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 2.1 of the License, or (at your option) any later version.

This 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 this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
USA

You can contact Health Market Science at info@healthmarketscience.com
or at the following address:

Health Market Science
2700 Horizon Drive
Suite 200
King of Prussia, PA 19406
 */
//package com.java2s;

import java.nio.ByteBuffer;

public class Main {
    /**
     * Reads an array of bytes from the given buffer
     * @param buffer Buffer containing the desired bytes
     * @param len length of the desired bytes
     * @return a new buffer with the given number of bytes from the current
     *         position in the given buffer
     */
    public static byte[] getBytes(ByteBuffer buffer, int len) {
        byte[] bytes = new byte[len];
        buffer.get(bytes);
        return bytes;
    }

    /**
     * Reads an array of bytes from the given buffer at the given offset
     * @param buffer Buffer containing the desired bytes
     * @param offset Offset at which to read the bytes
     * @param len length of the desired bytes
     * @return a new buffer with the given number of bytes from the given
     *         position in the given buffer
     */
    public static byte[] getBytes(ByteBuffer buffer, int offset, int len) {
        int origPos = buffer.position();
        try {
            buffer.position(offset);
            return getBytes(buffer, len);
        } finally {
            buffer.position(origPos);
        }
    }
}

Related Tutorials