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() throws IOException

Source Link

Document

Reads a single character.

Usage

From source file:Main.java

public static void main(String[] args) throws IOException {

    int i;//  w ww.j  a  v a2 s . c  o m

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

    while ((i = isr.read()) != -1) {
        char c = (char) i;
        System.out.println("Character read: " + c);
        // true if the next read is guaranteed
        boolean bool = isr.ready();

        System.out.println("Ready to read: " + bool);
    }
}

From source file:Main.java

public static void main(String[] args) throws IOException {
    int i;//w w w  .  java 2  s. c o m
    FileInputStream fis = new FileInputStream("C:/test.txt");
    InputStreamReader isr = new InputStreamReader(fis);

    // read till the end of the file
    while ((i = isr.read()) != -1) {
        // int to character
        char c = (char) i;
        System.out.println("Character Read: " + c);
    }
    isr.close();
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {

    String hostname = "localhost";

    Socket connection = null;/*from  w w w.j a va 2s  .c  o m*/
    connection = new Socket(hostname, DEFAULT_PORT);
    Writer out = new OutputStreamWriter(connection.getOutputStream(), "8859_1");
    out.write("\r\n");
    out.flush();
    InputStream raw = connection.getInputStream();
    BufferedInputStream buffer = new BufferedInputStream(raw);
    InputStreamReader in = new InputStreamReader(buffer, "8859_1");
    int c;
    while ((c = in.read()) != -1) {
        if ((c >= 32 && c < 127) || c == '\t' || c == '\r' || c == '\n') {
            System.out.write(c);
        }
    }
    connection.close();

}

From source file:Main.java

public static void main(String[] args) throws IOException {

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

    // input stream reader is closed
    isr.close();/* ww w .  ja  v a  2 s  .c o  m*/
    System.out.print("close() invoked");

    // read() called after closed method
    int i = isr.read();
    char c = (char) i;
    System.out.println(c);

}

From source file:ObfuscatingStream.java

/**
 * Obfuscates or unobfuscates the second command-line argument, depending on
 * whether the first argument starts with "o" or "u"
 * /*from   w ww . j a  v  a  2s  .  c o m*/
 * @param args
 *            Command-line arguments
 * @throws IOException
 *             If an error occurs obfuscating or unobfuscating
 */
public static void main(String[] args) throws IOException {
    InputStream input = new ByteArrayInputStream(args[1].getBytes());
    StringBuilder toPrint = new StringBuilder();
    if (args[0].startsWith("o")) {
        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
        OutputStream out = obfuscate(bytes);
        int read = input.read();
        while (read >= 0) {
            out.write(read);
            read = input.read();
        }
        byte[] receiptBytes = bytes.toByteArray();
        for (int b = 0; b < receiptBytes.length; b++) {
            int chr = (receiptBytes[b] + 256) % 256;
            toPrint.append(HEX_CHARS[chr >>> 4]);
            toPrint.append(HEX_CHARS[chr & 0xf]);
        }
    } else if (args[0].startsWith("u")) {
        input = unobfuscate(input);
        InputStreamReader reader = new InputStreamReader(input);

        int read = reader.read();
        while (read >= 0) {
            toPrint.append((char) read);
            read = reader.read();
        }
    } else
        throw new IllegalArgumentException("First argument must start with o or u");
    System.out.println(toPrint.toString());
}

From source file:CharsetDetector.java

public static void main(String[] args) {
    File f = new File("example.txt");

    String[] charsetsToBeTested = { "UTF-8", "windows-1253", "ISO-8859-7" };

    CharsetDetector cd = new CharsetDetector();
    Charset charset = cd.detectCharset(f, charsetsToBeTested);

    if (charset != null) {
        try {/*from   w w  w. j a  v  a2 s .co  m*/
            InputStreamReader reader = new InputStreamReader(new FileInputStream(f), charset);
            int c = 0;
            while ((c = reader.read()) != -1) {
                System.out.print((char) c);
            }
            reader.close();
        } catch (FileNotFoundException fnfe) {
            fnfe.printStackTrace();
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }

    } else {
        System.out.println("Unrecognized charset.");
    }
}

From source file:Main.java

public static void main(String[] args) throws IOException {

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

    // input stream reader is closed
    isr.close();//from   w ww . j a v  a  2 s. c  o m
    System.out.print("close() invoked");

    // read() called after closed method
    int i = isr.read();
    char c = (char) i;
    System.out.println(c);

}

From source file:Main.java

public static void main(String[] args) throws IOException {

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

    // input stream reader is closed
    isr.close();//from  w  ww  .ja  va2 s. c  om
    System.out.print("close() invoked");

    // read() called after closed method
    int i = isr.read();
    char c = (char) i;
    System.out.println(c);

}

From source file:Main.java

public static void main(String[] args) throws IOException {

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

    // input stream reader is closed
    isr.close();//from  w  w  w. j  a  v  a2  s.c  o  m
    System.out.print("close() invoked");

    // read() called after closed method
    int i = isr.read();
    char c = (char) i;
    System.out.println(c);

}

From source file:HrefMatch.java

public static void main(String[] args) {
    try {/*  w ww .j a va2s. c  om*/
        // get URL string from command line or use default
        String urlString;
        if (args.length > 0)
            urlString = args[0];
        else
            urlString = "http://java.sun.com";

        // open reader for URL
        InputStreamReader in = new InputStreamReader(new URL(urlString).openStream());

        // read contents into string builder
        StringBuilder input = new StringBuilder();
        int ch;
        while ((ch = in.read()) != -1)
            input.append((char) ch);

        // search for all occurrences of pattern
        String patternString = "<a\\s+href\\s*=\\s*(\"[^\"]*\"|[^\\s>]*)\\s*>";
        Pattern pattern = Pattern.compile(patternString, Pattern.CASE_INSENSITIVE);
        Matcher matcher = pattern.matcher(input);

        while (matcher.find()) {
            int start = matcher.start();
            int end = matcher.end();
            String match = input.substring(start, end);
            System.out.println(match);
        }
    } catch (IOException e) {
        e.printStackTrace();
    } catch (PatternSyntaxException e) {
        e.printStackTrace();
    }
}