Example usage for java.io InputStreamReader read

Introduction

In this page you can find the example usage for java.io InputStreamReader read.

Prototype

public int read(char cbuf[], int offset, int length) throws IOException 

Source Link

Document

Reads characters into a portion of an array.

Usage

From source file:Main.java

public static void main(String[] args) throws IOException {
    char[] cbuf = new char[5];

    FileInputStream fis = new FileInputStream("C:/test.txt");
    InputStreamReader isr = new InputStreamReader(fis);

    // reads into the char buffer
    int i = isr.read(cbuf, 2, 3);

    // prints the number of characters
    System.out.println("Number of characters read: " + i);

    // for each character in the character buffer
    for (char c : cbuf) {
        // for empty character
        if (((int) c) == 0)
            c = '-';

        System.out.println(c);//from   www. j  a  v a  2 s  .  co m
    }
    isr.close();
}

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From source file:Main.java

public static void main(String[] args) throws Exception {
    ZipFile zip = new ZipFile(new File("sample.zip"));

    for (Enumeration e = zip.entries(); e.hasMoreElements();) {
        ZipEntry entry = (ZipEntry) e.nextElement();
        System.out.println("File name: " + entry.getName() + "; size: " + entry.getSize()
                + "; compressed size: " + entry.getCompressedSize());
        InputStream is = zip.getInputStream(entry);
        InputStreamReader isr = new InputStreamReader(is);

        char[] buffer = new char[1024];
        while (isr.read(buffer, 0, buffer.length) != -1) {
            String s = new String(buffer);
            System.out.println(s.trim());
        }/*from w w w  . j ava 2 s .c o m*/
    }
}

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From source file:Main.java

public static String readText(InputStream in) {
    try {/*w  w  w . ja  v a  2 s . co  m*/
        int available = in.available();
        if (available > 0) {
            char[] text = new char[available];
            InputStreamReader reader = new InputStreamReader(in);
            int readed = reader.read(text, 0, available);
            return new String(text);
        }
    } catch (IOException e) {
    }
    return null;
}

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From source file:Main.java

public static String readStringFromInputStreamAndCloseStream(final InputStream inputStream,
        final int bufferSize) throws IOException {
    if (bufferSize <= 0) {
        // Safe close: it's more important to alert the programmer of
        // their error than to let them catch and continue on their way.
        throw new IllegalArgumentException("Expected buffer size larger than 0. Got: " + bufferSize);
    }//from   w  ww  .  ja v a 2  s  .co  m

    final StringBuilder stringBuilder = new StringBuilder(bufferSize);
    final InputStreamReader reader = new InputStreamReader(inputStream, Charset.forName("UTF-8"));
    try {
        int charsRead;
        final char[] buffer = new char[bufferSize];
        while ((charsRead = reader.read(buffer, 0, bufferSize)) != -1) {
            stringBuilder.append(buffer, 0, charsRead);
        }
    } finally {
        reader.close();
    }
    return stringBuilder.toString();
}

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From source file:com.telekom.api.common.webrequest.JsonSerializer.java

public static <T> T deserialize(InputStream stream, Class<T> valueType) throws IOException {

    // Convert stream to string first , because the string deserialization
    // routine/*from  www  . j a va2 s. co  m*/
    // contains a workaround
    InputStreamReader sr = new InputStreamReader(stream);
    StringBuilder sbBuilder = new StringBuilder();
    char[] buff = new char[1024];
    while (true) {
        int charsRead = sr.read(buff, 0, buff.length);

        if (charsRead == -1)
            break;

        sbBuilder.append(buff, 0, charsRead);
    }
    String content = sbBuilder.toString();

    return deserialize(content, valueType);
    // return mapper.readValue(stream, valueType);
}

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From source file:fr.ms.tomcat.manager.TomcatManagerUrl.java

private static String toString(final InputStream in, final String charset) throws IOException {
    final InputStreamReader reader = new InputStreamReader(in, charset);

    final StringBuffer buffer = new StringBuffer();
    final char[] chars = new char[1024];
    int n;//w ww  .j  a va 2s.c om
    while ((n = reader.read(chars, 0, chars.length)) != -1) {
        buffer.append(chars, 0, n);
    }

    return buffer.toString();
}

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From source file:com.commonsware.android.webserver.template.WebServerService.java

public static String slurp(final InputStream is) throws IOException {
    final char[] buffer = new char[1024];
    final StringBuilder out = new StringBuilder();
    final InputStreamReader in = new InputStreamReader(is, "UTF-8");

    while (true) {
        int rsz = in.read(buffer, 0, buffer.length);
        if (rsz < 0)
            break;
        out.append(buffer, 0, rsz);//from  w  w w.j a v  a2  s  .c  om
    }

    return (out.toString());
}

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From source file:sf.net.experimaestro.manager.js.JavaScriptChecker.java

static String getFileContent(FileObject file) throws IOException {
    InputStreamReader reader = new InputStreamReader(file.getContent().getInputStream());
    char[] cbuf = new char[8192];
    int read;/*from   w  w w  .  j  a v a 2  s .co  m*/
    StringBuilder builder = new StringBuilder();
    while ((read = reader.read(cbuf, 0, cbuf.length)) > 0)
        builder.append(cbuf, 0, read);
    return builder.toString();
}

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From source file:org.planetcrypto.bitcoin.PlanetCryptoBitcoinMinerAPICommands.java

private static String process(String cmd, InetSocketAddress ip, int port) throws Exception {
    Socket socket = new Socket();
    StringBuffer sb = new StringBuffer();
    char buf[] = new char[MAXRECEIVESIZE];
    int len = 0;//from  ww  w. j  av  a2s  . c  o  m
    //System.out.println("Attempting to send: " + cmd + " to: "+ ip.getHostAddress()+":"+port);
    try {
        //socket = new Socket(ip, port);
        socket.connect(ip, 2000);
        //System.out.println("Start Sleep");
        //Thread.sleep(1000);
        //System.out.println("Stop Sleep");
        socket.setSoTimeout(2000);
        //socket.(ip, port);
        //System.out.println(socket.getSoTimeout());
        PrintStream ps = new PrintStream(socket.getOutputStream());
        ps.print(cmd.toLowerCase().toCharArray());
        InputStreamReader isr = new InputStreamReader(socket.getInputStream());
        while (0x80085 > 0) {
            len = isr.read(buf, 0, MAXRECEIVESIZE);
            if (len < 1) {
                break;
            }
            sb.append(buf, 0, len);
            if (buf[len - 1] == '\0') {
                break;
            }
        }
        //closeAll();
        socket.close();
        socket = null;
    } catch (IOException ioe) {
        System.err.println(ioe.toString() + ", " + ip.getHostName());
        //closeAll();
        socket.close();
        socket = null;
        return "Failed to get information";
    }
    String result = sb.toString();
    //System.out.println(result);
    return result.replace("\0", "");
    //jsonFactory(result);
    //System.out.println(result);
}

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From source file:io.hops.hopsworks.common.jobs.yarn.LogReader.java

/**
 * Writes all logs for a single container to the provided writer.
 *
 * @param valueStream//from  w ww.j  a va2 s .c om
 * @param writer
 * @throws IOException
 */
public static void readAcontainerLogs(DataInputStream valueStream, Writer writer) throws IOException {
    int bufferSize = 65536;
    char[] cbuf = new char[bufferSize];
    String fileType;
    String fileLengthStr;
    long fileLength;

    while (true) {
        try {
            fileType = valueStream.readUTF();
        } catch (EOFException e) {
            // EndOfFile
            return;
        }
        fileLengthStr = valueStream.readUTF();
        fileLength = Long.parseLong(fileLengthStr);
        writer.write("\n\nLogType:");
        writer.write(fileType);
        writer.write("\nLogLength:");
        writer.write(fileLengthStr);
        writer.write("\nLog Contents:\n");
        // ByteLevel
        BoundedInputStream bis = new BoundedInputStream(valueStream, fileLength);
        InputStreamReader reader = new InputStreamReader(bis);
        int currentRead = 0;
        int totalRead = 0;
        while ((currentRead = reader.read(cbuf, 0, bufferSize)) != -1) {
            writer.write(cbuf, 0, currentRead);
            totalRead += currentRead;
        }
    }
}

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