Here you can find the source of readFile(String filename)
public static byte[] readFile(String filename) throws FileNotFoundException, IOException
//package com.java2s; /*// ww w. j av a 2 s .c o m * Quick-Key Toolset Project. * Copyright (C) 2010 FedICT. * * This is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License version * 3.0 as published by the Free Software Foundation. * * This software 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 software; if not, see * http://www.gnu.org/licenses/. */ import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; public class Main { public static byte[] readFile(String filename) throws FileNotFoundException, IOException { FileInputStream file = new FileInputStream(filename); byte[] data = new byte[(int) file.available()]; file.read(data); file.close(); return data; } }