Read file as bytes : Byte Read Write « File Input Output « Java

Home
Java
1.2D Graphics GUI
2.3D
3.Advanced Graphics
4.Ant
5.Apache Common
6.Chart
7.Class
8.Collections Data Structure
9.Data Type
10.Database SQL JDBC
11.Design Pattern
12.Development Class
13.EJB3
14.Email
15.Event
16.File Input Output
17.Game
18.Generics
19.GWT
20.Hibernate
21.I18N
22.J2EE
23.J2ME
24.JDK 6
25.JNDI LDAP
26.JPA
27.JSP
28.JSTL
29.Language Basics
30.Network Protocol
31.PDF RTF
32.Reflection
33.Regular Expressions
34.Scripting
35.Security
36.Servlets
37.Spring
38.Swing Components
39.Swing JFC
40.SWT JFace Eclipse
41.Threads
42.Tiny Application
43.Velocity
44.Web Services SOA
45.XML
Java » File Input Output » Byte Read WriteScreenshots 
Read file as bytes
Read file as bytes
     

//  Ahy - A pure java CMS.
//  Copyright (C) 2010 Sidney Leal (manish.com.br)
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  This program 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 for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
//package br.com.manish.ahy.fxadmin;

import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;

public class FileUtil {

        public static byte[] readFileAsBytes(String path, Integer start, Integer length) {

        byte[] byteData = null;

        try {

            File file = new File(path);

            DataInputStream dis;
            dis = new DataInputStream(new FileInputStream(file));

            if (dis.available() > Integer.MAX_VALUE) {
              System.out.println("dis.available() > Integer.MAX_VALUE");
            }

            ByteArrayOutputStream os = new ByteArrayOutputStream(length);
            byte[] bytes = new byte[length];

            dis.skipBytes(start);
            int readBytes = dis.read(bytes, 0, length);
            os.write(bytes, 0, readBytes);
            
            byteData = os.toByteArray();

            dis.close();
            os.close();

        catch (Exception e) {
            System.out.println(e);
        }

        return byteData;
    }

}

   
    
    
    
    
  
Related examples in the same category
1.Byte Reader with FileInputStream
2.Byte Writer with FileOutputStream
3.Binary Dump OutputStream
4.Compare binary files
5.Reads bytes available from one InputStream and returns these bytes in a byte array.
6.Buffered copying between source(InputStream, Reader, String and byte[]) and destinations (OutputStream, Writer, String and byte[]).
7.Write and read compressed forms of numbers to DataOutput and DataInput interfaces.
8.Count the number of bytes written to the output stream.
9.Read and return the entire contents of the supplied file.
10.Convert 4 hex digits to an int, and return the number of converted bytes.
11.Get bytes from InputStream
java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.