Here you can find the source of readLine(InputStream inputstream)
public static String readLine(InputStream inputstream) throws IOException
//package com.java2s; /*// w ww.j a v a 2s. c o m * #%L * warc-hadoop-recordreaders * %% * Copyright (C) 2013 - 2018 The webarchive-discovery project contributors * %% * 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 2 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/gpl-2.0.html>. * #L% */ import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; public class Main { public static String readLine(InputStream inputstream) throws IOException { int chr; ByteArrayOutputStream buffer = new ByteArrayOutputStream(); while ((chr = inputstream.read()) >= 0) { buffer.write(chr); if (chr == '\n') { break; } } return new String(buffer.toByteArray()); } }