Here you can find the source of readAllLines(File file, Charset cs, String newLineDelimiter)
public static String readAllLines(File file, Charset cs, String newLineDelimiter) throws IOException
//package com.java2s; /*//from w w w . ja v a 2 s.co m * This file is part of the L2J Mobius project. * * 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.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.nio.charset.Charset; public class Main { public static String readAllLines(File file, Charset cs, String newLineDelimiter) throws IOException { final StringBuilder sb = new StringBuilder(); try (InputStream in = new FileInputStream(file); final InputStreamReader reader = new InputStreamReader(in, cs); final BufferedReader buffer = new BufferedReader(reader)) { String line; while ((line = buffer.readLine()) != null) { sb.append(line); if (newLineDelimiter != null) { sb.append(newLineDelimiter); } } } return sb.toString(); } }