Here you can find the source of readFile(String file)
public static String readFile(String file) throws IOException
//package com.java2s; /*/*from w w w .j a va2s .com*/ * Copyright (C) 2012 The Stanford MobiSocial Laboratory * * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.io.*; public class Main { public static String readFile(String file) throws IOException { StringBuilder sb = new StringBuilder(); LineNumberReader lnr = new LineNumberReader(new InputStreamReader(new FileInputStream(file))); while (true) { String line = lnr.readLine(); if (line == null) break; line = line.trim(); sb.append(line); sb.append("\n"); } lnr.close(); return sb.toString(); } public static void close(Closeable resource) { if (resource != null) { try { resource.close(); } catch (IOException e) { // Do your thing with the exception. Print it, log it or mail // it. e.printStackTrace(); } } } }