Java Byte Array from getBytesArrayFromFile(String fileName)

Description

Get the bytes array from a file

License

Open Source License

Parameter

Parameter	Description
fileName	the file to get the bytes array

Return

he bytes array

Declaration

public static byte[] getBytesArrayFromFile(String fileName)
        throws Exception 

Method Source Code

//package com.java2s;
/*/*from ww w . j ava2  s . c  o m*/
 * Copyright (c) 2003-2010 The Regents of the University of California.
 * All rights reserved.
 *
 * '$Author: crawl $'
 * '$Date: 2013-02-21 11:20:05 -0800 (Thu, 21 Feb 2013) $' 
 * '$Revision: 31474 $'
 * 
 * Permission is hereby granted, without written agreement and without
 * license or royalty fees, to use, copy, modify, and distribute this
 * software and its documentation for any purpose, provided that the above
 * copyright notice and the following two paragraphs appear in all copies
 * of this software.
 *
 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
 * FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
 * THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
 * PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
 * CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
 * ENHANCEMENTS, OR MODIFICATIONS.
 *
 */

import java.io.FileInputStream;

public class Main {
    /**
     * Get the bytes array from a file
     * 
     *@param  fileName  
     *              the file to get the bytes array
     *@return  he bytes array
     */
    public static byte[] getBytesArrayFromFile(String fileName)
            throws Exception {
        byte[] readBytes = new byte[2000];
        int n = 0;
        int i = 0;

        byte[] totalBytes = null;
        byte[] tmpBytes = null;
        int curByteCnt = 0;
        try {
            FileInputStream file = new FileInputStream(fileName);
            n = file.read(readBytes, 0, 2000);
            curByteCnt = 0;
            while (n > 0) {
                if (totalBytes == null) {
                    totalBytes = new byte[n];
                    for (i = 0; i < n; i++) {
                        totalBytes[i] = readBytes[i];
                    }
                } else {
                    tmpBytes = new byte[totalBytes.length];
                    for (i = 0; i < totalBytes.length; i++) {
                        tmpBytes[i] = totalBytes[i];
                    }

                    totalBytes = null;
                    totalBytes = new byte[tmpBytes.length + n];
                    for (i = 0; i < tmpBytes.length; i++) {
                        totalBytes[i] = tmpBytes[i];
                    }
                    for (i = 0; i < n; i++) {
                        totalBytes[tmpBytes.length + i] = readBytes[i];
                    }

                    tmpBytes = null;
                }

                n = file.read(readBytes, 0, 2000);
            }

            file.close();
        } catch (Exception e) {
            throw e;
        }

        return totalBytes;
    }
}

Related

1. getBytes(String input)
2. getBytes(ZipFile archive, ZipEntry entry)
3. getBytes(ZipInputStream zipInputStream)
4. getBytes2(InputStream aStream)
5. getBytesAndClose(InputStream in)
6. getBytesASCII(String s)
7. getBytesAsTempFile(byte[] bytes)
8. getBytesClassic(final int count, final InputStream is)
9. getBytesFromArrayList(final ArrayList fileList)