Here you can find the source of readTextFile(File f)
public static String readTextFile(File f)
//package com.java2s; /*//ww w . j a v a 2s. c o m Bandika - A Java based modular Content Management System Copyright (C) 2009-2018 Michael Roennau 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/>. */ import java.io.*; public class Main { public static String readTextFile(String path) { File f = new File(path); return readTextFile(f); } public static String readTextFile(File f) { StringBuilder sb = new StringBuilder(); try { if (!f.exists()) { return ""; } FileReader reader = new FileReader(f); char[] chars = new char[4096]; int len = 4096; while (len > 0) { len = reader.read(chars, 0, 4096); if (len > 0) { sb.append(chars, 0, len); } } reader.close(); } catch (IOException e) { return ""; } return sb.toString(); } }