Here you can find the source of readFile(File file)
public static byte[] readFile(File file) throws Exception
//package com.java2s; /**//ww w . j av a 2 s . c o m * LearnPAd - Verification Component * * Copyright (C) 2015 Unicam * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * @author Damiano Falcioni - Unicam <damiano.falcioni@gmail.com> */ import java.io.File; import java.io.RandomAccessFile; public class Main { public static byte[] readFile(String file) throws Exception { return readFile(new File(file)); } public static byte[] readFile(File file) throws Exception { RandomAccessFile raf = new RandomAccessFile(file, "r"); byte[] ret = new byte[(int) raf.length()]; raf.read(ret); raf.close(); return ret; } }