Java OutputStream Write Text readLine(java.io.InputStream input)

Description

read Line

License

Open Source License

Declaration

public static String readLine(java.io.InputStream input)
            throws IOException 

Method Source Code

//package com.java2s;
/*/*from w w  w. jav  a  2s.c  o  m*/
 * DBeaver - Universal Database Manager
 * Copyright (C) 2010-2016 Serge Rieder (serge@jkiss.org)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License (version 2)
 * as published by the Free Software Foundation.
 *
 * 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, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

import java.io.*;

public class Main {
    public static final int DEFAULT_BUFFER_SIZE = 16384;

    public static String readLine(java.io.InputStream input)
            throws IOException {
        StringBuilder linebuf = new StringBuilder();
        for (int b = input.read(); b != '\n'; b = input.read()) {
            if (b == -1) {
                if (linebuf.length() == 0) {
                    return null;
                } else {
                    break;
                }
            }
            if (b != '\r') {
                linebuf.append((char) b);
            }
        }
        return linebuf.toString();
    }

    public static String toString(File file) throws IOException {
        try (Reader reader = new FileReader(file)) {
            StringWriter writer = new StringWriter();
            copyText(reader, writer, DEFAULT_BUFFER_SIZE);
            return writer.toString();
        }
    }

    /**
       Read entire reader content and writes it to writer
       then closes reader and flushed output.
     */
    public static void copyText(java.io.Reader reader,
            java.io.Writer writer, int bufferSize) throws IOException {
        char[] writeBuffer = new char[bufferSize];
        for (int br = reader.read(writeBuffer); br != -1; br = reader
                .read(writeBuffer)) {
            writer.write(writeBuffer, 0, br);
        }
        writer.flush();
    }

    public static void copyText(java.io.Reader reader, java.io.Writer writer)
            throws IOException {
        copyText(reader, writer, DEFAULT_BUFFER_SIZE);
    }
}

Related

1. readLine(InputStream in, OutputStream out)
2. readLine(InputStream in, OutputStream out)