Example usage for java.io FileInputStream read

Introduction

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

Prototype

public int read() throws IOException

Source Link

Document

Reads a byte of data from this input stream.

Usage

From source file:Main.java

public static void main(String[] args) {

    String s = "from java2s.com!";

    try {// www. j  ava  2s .  c o  m

        OutputStream os = new FileOutputStream("test.txt");
        OutputStreamWriter writer = new OutputStreamWriter(os, Charset.defaultCharset());

        FileInputStream in = new FileInputStream("test.txt");

        writer.write(s, 0, 5);

        writer.flush();

        for (int i = 0; i < 5; i++) {
            System.out.print((char) in.read());
        }
        writer.close();
        in.close();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

From source file:Main.java

public static void main(String[] args) {

    String s = "from java2s.com!";

    try {/*from   w  w  w  . j  av a 2 s .  com*/

        OutputStream os = new FileOutputStream("test.txt");
        OutputStreamWriter writer = new OutputStreamWriter(os, java.nio.charset.StandardCharsets.UTF_8);

        FileInputStream in = new FileInputStream("test.txt");

        writer.write(s, 0, 5);

        writer.flush();

        for (int i = 0; i < 5; i++) {
            System.out.print((char) in.read());
        }
        writer.close();
        in.close();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

From source file:Main.java

public static void main(String[] args) {
    for (int i = 0; i < args.length; i++) {
        try {//from   ww w.  j  a  v  a 2s  .com
            FileInputStream fin = new FileInputStream(args[i]);
            FileOutputStream fout = new FileOutputStream(args[i] + "dfl");
            DeflaterOutputStream dos = new DeflaterOutputStream(fout);
            for (int c = fin.read(); c != -1; c = fin.read()) {
                dos.write(c);
            }
            dos.close();
            fin.close();
        } catch (IOException ex) {
            System.err.println(ex);
        }
    }
}

From source file:MainClass.java

public static void main(String[] args) {

    for (int i = 0; i < args.length; i++) {
        try {/*from   www.  ja  va  2s .  com*/
            FileInputStream fin = new FileInputStream(args[i]);
            FileOutputStream fout = new FileOutputStream(args[i] + DEFLATE_SUFFIX);
            DeflaterOutputStream dos = new DeflaterOutputStream(fout);
            for (int c = fin.read(); c != -1; c = fin.read()) {
                dos.write(c);
            }
            dos.close();
            fin.close();
        } catch (IOException ex) {
            System.err.println(ex);
        }
    }
}

From source file:CopyBytes.java

public static void main(String[] args) throws IOException {
    FileInputStream in = null;
    FileOutputStream out = null;/*ww  w. j a  v  a2  s  . c  o  m*/
    try {
        in = new FileInputStream("xanadu.txt");
        out = new FileOutputStream("outagain.txt");
        int c;

        while ((c = in.read()) != -1) {
            out.write(c);
        }

    } finally {
        if (in != null) {
            in.close();
        }
        if (out != null) {
            out.close();
        }
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Properties prop = new Properties();

    prop.put("Chapter Count", "200");
    prop.put("Tutorial Count", "15");
    prop.put("tutorial", "java2s.com");

    // create a output and input as a xml file
    FileOutputStream fos = new FileOutputStream("properties.xml");
    FileInputStream fis = new FileInputStream("properties.xml");

    // store the properties in the specific xml
    prop.storeToXML(fos, "Properties Example");

    // print the xml
    while (fis.available() > 0) {
        System.out.print((char) fis.read());
    }//from www  . j  a  v  a  2 s . c  o  m

}

From source file:Main.java

public static void main(String[] args) {

    try {/*from   w ww.jav  a2  s  . co m*/
        // create a new OutputStreamWriter
        OutputStream os = new FileOutputStream("test.txt");
        OutputStreamWriter writer = new OutputStreamWriter(os);

        // create a new FileInputStream to read what we write
        FileInputStream in = new FileInputStream("test.txt");

        // write something in the file
        writer.write(70);

        // flush the stream
        writer.flush();
        // read what we write
        System.out.println((char) in.read());
        writer.close();
        os.close();

    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    KeyGenerator keyGenerator = KeyGenerator.getInstance("Blowfish");

    keyGenerator.init(128);/*  w ww  . java 2  s  . com*/
    Key secretKey = keyGenerator.generateKey();

    Cipher cipherOut = Cipher.getInstance("Blowfish/CFB/NoPadding");

    cipherOut.init(Cipher.ENCRYPT_MODE, secretKey);
    BASE64Encoder encoder = new BASE64Encoder();
    byte iv[] = cipherOut.getIV();
    if (iv != null) {
        System.out.println("Initialization Vector of the Cipher:\n" + encoder.encode(iv));
    }
    FileInputStream fin = new FileInputStream("inputFile.txt");
    FileOutputStream fout = new FileOutputStream("outputFile.txt");
    CipherOutputStream cout = new CipherOutputStream(fout, cipherOut);
    int input = 0;
    while ((input = fin.read()) != -1) {
        cout.write(input);
    }

    fin.close();
    cout.close();
}

From source file:Main.java

public static void main(String[] args) {

    try {/*from   w ww  . j  av a 2s .  c o  m*/
        OutputStream os = new FileOutputStream("test.txt");
        OutputStreamWriter writer = new OutputStreamWriter(os);

        // create a new FileInputStream to read what we write
        FileInputStream in = new FileInputStream("test.txt");

        // write something in the file
        writer.write(70);

        // flush the stream
        writer.flush();

        // read what we write
        System.out.println((char) in.read());

        // close the stream
        writer.close();
        os.close();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

From source file:testSig.java

public static void main(String[] args) {

    /* Test generating and verifying a DSA signature */

    try {//from   w ww.j a  v  a  2s  .  c o m

        /* generate a key pair */

        KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
        keyGen.initialize(1024, new SecureRandom());
        KeyPair pair = keyGen.generateKeyPair();

        /*
         * create a Signature object to use for signing and verifying
         */

        Signature dsa = Signature.getInstance("SHA/DSA");

        /* initialize the Signature object for signing */

        PrivateKey priv = pair.getPrivate();

        dsa.initSign(priv);

        /* Update and sign the data */

        FileInputStream fis = new FileInputStream(args[0]);
        byte b;
        while (fis.available() != 0) {
            b = (byte) fis.read();
            dsa.update(b);
        }
        ;

        fis.close();

        /*
         * Now that all the data to be signed has been read in, sign it
         */
        byte[] sig = dsa.sign();

        /* Verify the signature */

        /* Initialize the Signature object for verification */
        PublicKey pub = pair.getPublic();
        dsa.initVerify(pub);

        /* Update and verify the data */

        fis = new FileInputStream(args[0]);
        while (fis.available() != 0) {
            b = (byte) fis.read();
            dsa.update(b);
        }
        ;

        fis.close();

        boolean verifies = dsa.verify(sig);

        System.out.println("signature verifies: " + verifies);

    } catch (Exception e) {
        System.err.println("Caught exception " + e.toString());
    }

}