Example usage for java.io FileInputStream close

Introduction

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

Prototype

public void close() throws IOException

Source Link

Document

Closes this file input stream and releases any system resources associated with the stream.

Usage

From source file:testSig.java

public static void main(String[] args) {

    /* Test generating and verifying a DSA signature */

    try {/*  ww  w. j ava2 s.co 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());
    }

}

From source file:Main.java

public static void main(String[] args) {
    for (int i = 0; i < args.length; i++) {
        try {/*w  w  w  . jav a  2 s  . co  m*/
            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:ByteReader.java

public static void main(String[] arguments) {
    try {//from  ww  w.ja va  2  s.  co  m
        FileInputStream file = new FileInputStream("class.dat");
        boolean eof = false;
        int count = 0;
        while (!eof) {
            int input = file.read();
            System.out.print(input + " ");
            if (input == -1)
                eof = true;
            else
                count++;
        }
        file.close();
        System.out.println("\nBytes read: " + count);
    } catch (IOException e) {
        System.out.println("Error - " + e.toString());
    }
}

From source file:com.yahoo.pulsar.client.cli.PulsarClientTool.java

public static void main(String[] args) throws Exception {
    if (args.length == 0) {
        System.out.println("Usage: pulsar-client CONF_FILE_PATH [options] [command] [command options]");
        System.exit(-1);//from  w  ww  .  ja v a  2s  . c  o  m
    }
    String configFile = args[0];
    Properties properties = new Properties();

    if (configFile != null) {
        FileInputStream fis = null;
        try {
            fis = new FileInputStream(configFile);
            properties.load(fis);
        } finally {
            if (fis != null) {
                fis.close();
            }
        }
    }

    PulsarClientTool clientTool = new PulsarClientTool(properties);
    int exit_code = clientTool.run(Arrays.copyOfRange(args, 1, args.length));

    System.exit(exit_code);

}

From source file:main.ReportGenerator.java

/**
 * Entry point for the program./*from   ww w . ja  v  a  2  s. co m*/
 * Takes the variables as JSON on the standard input.
 * @param args Arguments from the command line.
 */
public static void main(String[] args) {
    CommandLine cmd = createOptions(args);

    GeneratorError result = GeneratorError.NO_ERROR;
    try {
        //Build the output name, by default ./output
        String directory = cmd.getOptionValue("output", "./");
        if (!directory.endsWith(File.separator))
            directory += File.separator;
        String filename = cmd.getOptionValue("name", "output");
        String output = directory + filename;

        //Get the JSON from file if given, or get it from the standard input.
        String jsonText = null;
        if (!cmd.hasOption("input")) {
            // Initializes the input with the standard input
            jsonText = IOUtils.toString(System.in, "UTF-8");
        } else // read the file
        {
            FileInputStream inputStream = new FileInputStream(cmd.getOptionValue("input"));
            try {
                jsonText = IOUtils.toString(inputStream);
            } finally {
                inputStream.close();
            }
        }

        //Build the report object
        Report report = new Report(jsonText, cmd.getOptionValue("template"), output);

        //Generate the document
        if (cmd.hasOption("all")) {
            new AllGenerator(report).generate();
        } else {
            if (cmd.hasOption("html"))
                new HTMLGenerator(report).generate();
            if (cmd.hasOption("pdf"))
                new PDFGenerator(report).generate();
            if (cmd.hasOption("doc"))
                new DocGenerator(report).generate();
        }

    } catch (IOException e) {
        System.err.println("Error: " + e.getMessage());
        System.exit(GeneratorError.IO_ERROR.getCode());
    } catch (GeneratorException e) {
        System.err.println("Error: " + e.getMessage());
        System.exit(e.getError().getCode());
    }
    System.exit(result.getCode());
}

From source file:Main.java

public static void main(String args[]) throws Exception {
    FileInputStream fIn = new FileInputStream("test.txt");
    FileChannel fChan = fIn.getChannel();

    long fSize = fChan.size();
    ByteBuffer mBuf = ByteBuffer.allocate((int) fSize);

    fChan.read(mBuf);/*from   w w  w.j ava 2  s .co  m*/
    mBuf.rewind();

    for (int i = 0; i < fSize; i++) {
        System.out.print((char) mBuf.get());
    }
    fChan.close();
    fIn.close();
}

From source file:Main.java

public static void main(String args[]) throws Exception {
    FileInputStream fIn = new FileInputStream("test.txt");
    FileChannel fChan = fIn.getChannel();

    long fSize = fChan.size();
    ByteBuffer mBuf = ByteBuffer.allocate((int) fSize);

    fChan.read(mBuf, 10);//w w  w.  j ava2  s  . c  om
    mBuf.rewind();

    for (int i = 0; i < fSize; i++) {
        System.out.print((char) mBuf.get());
    }
    fChan.close();
    fIn.close();
}

From source file:MainClass.java

public static void main(String[] args) {

    for (int i = 0; i < args.length; i++) {
        try {/*from  w ww.  j  a va2 s  .  c  o  m*/
            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:Main.java

public static void main(String[] args) throws Exception {
    FileInputStream fis = new FileInputStream("main.java");
    int i = 0;/*ww w  .j  a  v  a2 s. co  m*/
    int count = 0;

    while ((i = fis.read()) != -1) {
        if (i != -1) {
            System.out.printf("%02X ", i);
            count++;
        }

        if (count == 16) {
            System.out.println("");
            count = 0;
        }
    }
    fis.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    boolean areFilesIdentical = true;
    File file1 = new File("c:\\file1.txt");
    File file2 = new File("c:\\file2.txt");
    FileInputStream fis1 = new FileInputStream(file1);
    FileInputStream fis2 = new FileInputStream(file2);
    int i1 = fis1.read();
    int i2 = fis2.read();
    while (i1 != -1) {
        if (i1 != i2) {
            areFilesIdentical = false;/*from www. j a  v a2  s  . c o m*/
            break;
        }
        i1 = fis1.read();
        i2 = fis2.read();
    }
    fis1.close();
    fis2.close();
    System.out.println(areFilesIdentical);
}