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:Main.java

public static void main(String[] args) {

    try {/* w  w w.  j  a  v  a  2 s.com*/
        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();

        // get and print the encoding for this stream
        System.out.println(writer.getEncoding());

        // 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[]) {
    FileInputStream fIn;//from w  ww .j av  a  2 s  .  co m
    FileChannel fChan;
    long fSize;
    ByteBuffer mBuf;

    try {
        fIn = new FileInputStream("test.txt");

        fChan = fIn.getChannel();

        fSize = fChan.size();

        mBuf = ByteBuffer.allocate((int) fSize);

        fChan.read(mBuf);

        mBuf.rewind();

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

From source file:ExplicitChannelRead.java

public static void main(String args[]) {
    FileInputStream fIn;/*from   w w  w  .  j a  v a2 s  .  c o  m*/
    FileChannel fChan;
    long fSize;
    ByteBuffer mBuf;

    try {
        fIn = new FileInputStream("test.txt");
        fChan = fIn.getChannel();
        fSize = fChan.size();
        mBuf = ByteBuffer.allocate((int) fSize);
        fChan.read(mBuf);
        mBuf.rewind();
        for (int i = 0; i < fSize; i++)
            System.out.print((char) mBuf.get());
        fChan.close();
        fIn.close();
    } catch (IOException exc) {
        System.out.println(exc);
        System.exit(1);
    }
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    String keystoreFilename = "my.keystore";

    char[] password = "password".toCharArray();
    String alias = "alias";

    FileInputStream fIn = new FileInputStream(keystoreFilename);
    KeyStore keystore = KeyStore.getInstance("JKS");

    keystore.load(fIn, password);// www.  j a v a2 s .  com

    Certificate cert = keystore.getCertificate(alias);

    System.out.println(cert);
}

From source file:Sequence.java

public static void main(String args[]) throws IOException {
    Vector v = new Vector(3);
    v.add(new FileInputStream("/etc/motd"));
    v.add(new FileInputStream("foo.bar"));
    v.add(new FileInputStream("/temp/john.txt"));
    Enumeration e = v.elements();
    SequenceInputStream sis = new SequenceInputStream(e);
    InputStreamReader isr = new InputStreamReader(sis);
    BufferedReader br = new BufferedReader(isr);
    String line;//from  w w  w . j  av  a  2 s.co m
    while ((line = br.readLine()) != null) {
        System.out.println(line);
    }
    br.close();
}

From source file:Main.java

public static void main(String[] args) {
    byte[] b = { 'h', 'e', 'l', 'l', 'o' };
    try {/*from  w w  w. jav a  2s  .  c o m*/

        OutputStream os = new FileOutputStream("test.txt");

        InputStream is = new FileInputStream("test.txt");

        os.write(b, 0, 3);

        for (int i = 0; i < 3; i++) {
            System.out.print((char) is.read());
        }
        os.close();
        is.close();
    } catch (Exception ex) {
        ex.printStackTrace();
    }

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Socket socket = new Socket("localhost", 8000);
    File file = new File("C:/Users/abc/Desktop/image.jpg");
    FileInputStream fileInputStream = new FileInputStream(file);

    byte[] fileBytes = new byte[(int) file.length()];
    OutputStream outputStream = socket.getOutputStream();
    int content;//from  ww w  .j a va  2s  . c om
    while ((content = fileInputStream.read(fileBytes)) != -1) {
        outputStream.write(fileBytes, 0, (int) file.length());
    }

    System.out.println("file size is " + fileBytes.length);
    for (byte a : fileBytes) {
        System.out.println(a);
    }
    socket.close();
    fileInputStream.close();
}

From source file:Main.java

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

    Vector theStreams = new Vector();

    for (int i = 0; i < args.length; i++) {
        FileInputStream fin = new FileInputStream(args[i]);
        theStreams.addElement(fin);/*from www  .j  ava  2 s.com*/
    }

    InputStream in = new SequenceInputStream(theStreams.elements());
    for (int i = in.read(); i != -1; i = in.read()) {
        System.out.write(i);
    }
}

From source file:MappedChannelRead.java

public static void main(String args[]) {
    FileInputStream fIn;/*from  ww  w  . ja  va  2 s  .c o  m*/
    FileChannel fChan;
    long fSize;
    MappedByteBuffer mBuf;

    try {
        fIn = new FileInputStream("test.txt");
        fChan = fIn.getChannel();
        fSize = fChan.size();
        mBuf = fChan.map(FileChannel.MapMode.READ_ONLY, 0, fSize);
        for (int i = 0; i < fSize; i++)
            System.out.print((char) mBuf.get());

        fChan.close();
        fIn.close();
    } catch (IOException exc) {
        System.out.println(exc);
        System.exit(1);
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    FileInputStream in1 = new FileInputStream(new File("file1.xml"));
    FileInputStream in2 = new FileInputStream(new File("file2.xml"));

    System.out.println(digest(in1));
    System.out.println(digest(in2));
}