Example usage for java.io FileInputStream FileInputStream

Introduction

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

Prototype

public FileInputStream(FileDescriptor fdObj)

Source Link

Document

Creates a FileInputStream by using the file descriptor fdObj, which represents an existing connection to an actual file in the file system.

Usage

From source file:MainClass.java

public static void main(String[] a) {
    File aFile = new File("C:/myFile.text");
    FileInputStream inputFile1 = null;
    FileDescriptor fd = null;//w  ww .ja  v  a2 s . c  om
    try {
        inputFile1 = new FileInputStream(aFile);
        fd = inputFile1.getFD();
    } catch (IOException e) {
        e.printStackTrace(System.err);
        System.exit(1);
    }
    FileInputStream inputFile2 = new FileInputStream(fd);
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    File fromFile = new File("fromFile.txt");
    File toFile = new File("toFile.txt");
    FileInputStream inFile = new FileInputStream(fromFile);
    FileOutputStream outFile = new FileOutputStream(toFile);
    FileChannel inChannel = inFile.getChannel();
    FileChannel outChannel = outFile.getChannel();
    int bytesWritten = 0;
    long byteCount = inChannel.size();
    while (bytesWritten < byteCount) {
        bytesWritten += inChannel.transferTo(bytesWritten, byteCount - bytesWritten, outChannel);
    }//from  ww  w .java2  s.c  om
    inFile.close();
    outFile.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    XPath xp = XPathFactory.newInstance().newXPath();
    InputSource xml = new InputSource(new FileInputStream("input.xml"));
    double count = (Double) xp.evaluate("count(//slot[@name='slot1']/port)", xml, XPathConstants.NUMBER);
}

From source file:MainClass.java

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

    for (int i = 0; i < args.length; i++) {
        FileInputStream fin = new FileInputStream(args[i]);
        ZipInputStream zin = new ZipInputStream(fin);
        ZipEntry ze = null;//from w w w  .j a v  a2  s.co m
        while ((ze = zin.getNextEntry()) != null) {
            System.out.println("Unzipping " + ze.getName());
            FileOutputStream fout = new FileOutputStream(ze.getName());
            for (int c = zin.read(); c != -1; c = zin.read()) {
                fout.write(c);
            }
            zin.closeEntry();
            fout.close();
        }
        zin.close();
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    FileInputStream is = new FileInputStream("your.keystore");

    KeyStore keystore = KeyStore.getInstance(KeyStore.getDefaultType());
    keystore.load(is, "my-keystore-password".toCharArray());

    String alias = "myalias";

    Key key = keystore.getKey(alias, "password".toCharArray());
    if (key instanceof PrivateKey) {
        // Get certificate of public key
        Certificate cert = keystore.getCertificate(alias);

        // Get public key
        PublicKey publicKey = cert.getPublicKey();

        // Return a key pair
        new KeyPair(publicKey, (PrivateKey) key);
    }/*  w ww  .ja v  a2 s  . c o  m*/
}

From source file:Main.java

public static void main(String[] args) {

    try {//from www .  java2 s. c  om
        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:Main.java

public static void main(String[] args) throws Exception {
    InputStream inputStream = new FileInputStream("data.xml");
    InputSource inputSource = new InputSource(inputStream);
    XPath xpath = XPathFactory.newInstance().newXPath();
    XPathExpression expr = xpath.compile("/PaymentElement/Payment/@seqID");
    Object result = expr.evaluate(inputSource, XPathConstants.STRING);
    System.out.println(result);/* ww  w. j a  va  2 s .c o  m*/
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    String fromFileName = "from.txt";
    String toFileName = "to.txt";
    BufferedInputStream in = new BufferedInputStream(new FileInputStream(fromFileName));
    BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(toFileName));
    byte[] buff = new byte[32 * 1024];
    int len;/*from ww w . ja v  a 2s  . c o  m*/
    while ((len = in.read(buff)) > 0)
        out.write(buff, 0, len);
    in.close();
    out.close();
}

From source file:EOF.java

public static void main(String args[]) {
    DataInputStream is = null;//from  w  w w  .j  a  va2  s  .  c  o  m
    byte ch;
    try {
        is = new DataInputStream(new FileInputStream("EOF.java"));
        while (true) { // exception deals catches EOF
            ch = is.readByte();
            System.out.print((char) ch);
            System.out.flush();
        }
    } catch (EOFException eof) {
        System.out.println(" >> Normal program termination.");
    } catch (FileNotFoundException noFile) {
        System.err.println("File not found! " + noFile);
    } catch (IOException io) {
        System.err.println("I/O error occurred: " + io);
    } catch (Throwable anything) {
        System.err.println("Abnormal exception caught !: " + anything);
    } finally {
        if (is != null) {
            try {
                is.close();
            } catch (IOException ignored) {
            }
        }
    }
}

From source file:Main.java

public static void main(String[] args) {
    try {/* www. ja  va2  s  .  co 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);
        writer.write(71);
        writer.write(72);

        // flush the stream
        writer.flush();

        // read what we write
        for (int i = 0; i < 3; i++) {
            System.out.print((char) in.read());
        }
        writer.close();
        in.close();

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