Here you can find the source of getBytesFromFile(String fileName)
public static byte[] getBytesFromFile(String fileName)
//package com.java2s; /*//from w ww .ja v a 2 s . c om The contents of this file are subject to the Mozilla Public License Version 1.1 (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.mozilla.org/MPL/ Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. The Original Code is OpenFAST. The Initial Developer of the Original Code is The LaSalle Technology Group, LLC. Portions created by The LaSalle Technology Group, LLC are Copyright (C) The LaSalle Technology Group, LLC. All Rights Reserved. Contributor(s): Jacob Northey <jacob@lasalletech.com> Craig Otis <cotis@lasalletech.com> */ import java.io.ByteArrayOutputStream; import java.io.FileInputStream; public class Main { public static byte[] getBytesFromFile(String fileName) { byte[] result = null; try { ByteArrayOutputStream bos = new ByteArrayOutputStream(2048); byte[] buff = new byte[2048]; FileInputStream fis = new FileInputStream(fileName); while (true) { int len = fis.read(buff); if (len == -1) { break; } bos.write(buff, 0, len); } result = bos.toByteArray(); } catch (Exception e) { e.printStackTrace(); } return result; } }