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[] argv) throws Exception {
    String source = "s.gzip";
    GZIPInputStream in = new GZIPInputStream(new FileInputStream(source));
    String target = "outfile";
    OutputStream out = new FileOutputStream(target);
    byte[] buf = new byte[1024];
    int len;/*  ww w . j a v  a  2s  .  c  om*/
    while ((len = in.read(buf)) > 0) {
        out.write(buf, 0, len);
    }
    in.close();
    out.close();
}

From source file:Main.java

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

    int i = 0;// w  w  w.j av a  2  s  . c  om

    InputStream is = new FileInputStream("C://test.txt");
    FilterInputStream fis = new BufferedInputStream(is);

    while ((i = fis.read()) != -1) {
        char c = (char) i;

        System.out.print("Read: " + c);

        int j = fis.available();

        System.out.println("; Available bytes: " + j);
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    // Create an input stream on a file
    InputStream is = new BufferedInputStream(new FileInputStream("output.xml"));

    // Import preference data

    Preferences.importPreferences(is);
}

From source file:Main.java

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

    // create input streams
    InputStream is = new FileInputStream("C://test.txt");
    FilterInputStream fis = new BufferedInputStream(is);

    // closes and releases the associated system resources
    fis.close();//from   w  w  w .j  a  va  2  s. co m

    // read is called after close() invocation
    fis.read();

}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    CertificateFactory cf = CertificateFactory.getInstance("X.509");
    FileInputStream in = new FileInputStream(args[0]);
    X509CRL crl = (X509CRL) cf.generateCRL(in);
    System.out.println("type = " + crl.getType());
    System.out.println("version = " + crl.getVersion());
    System.out.println("issuer = " + crl.getIssuerDN().getName());
    System.out.println("signing algorithm = " + crl.getSigAlgName());
    System.out.println("this update = " + crl.getThisUpdate());
    System.out.println("next update = " + crl.getNextUpdate());
    in.close();/* w w  w .  j a v  a  2s  .  com*/
}

From source file:Main.java

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

    byte[] buffer = new byte[6];

    InputStream is = new FileInputStream("C://test.txt");
    FilterInputStream fis = new BufferedInputStream(is);

    // returns number of bytes read to buffer
    int i = fis.read(buffer, 2, 4);

    System.out.println("Number of bytes read: " + i);

    // for each byte in buffer
    for (byte b : buffer) {
        // converts byte to character
        char c = (char) b;

        // if byte is null
        if (b == 0) {
            c = '-';
        }//w w  w  . j  a  va 2 s. c  om
        System.out.println("Char read from buffer b: " + c);
    }

}

From source file:MainClass.java

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

    FileInputStream inFile = new FileInputStream(args[0]);
    FileOutputStream outFile = new FileOutputStream(args[1]);

    FileChannel inChannel = inFile.getChannel();
    FileChannel outChannel = outFile.getChannel();

    ByteBuffer buffer = ByteBuffer.allocate(1024 * 1024);
    int bytesRead = 0;
    while (bytesRead >= 0 || buffer.hasRemaining()) {
        if (bytesRead != -1)
            bytesRead = inChannel.read(buffer);
        buffer.flip();//from   www  . j  a v  a 2s. co  m
        outChannel.write(buffer);
        buffer.compact();
    }

    inChannel.close();
    outChannel.close();
}

From source file:Main.java

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

    int i = 0;/*from   w  w w.j a va  2 s  .com*/

    // create input streams
    InputStream is = new FileInputStream("C://test.txt");
    FilterInputStream fis = new BufferedInputStream(is);

    while ((i = fis.read()) != -1) {
        // converts integer to character
        char c = (char) i;

        // skips 3 bytes
        fis.skip(3);

        System.out.println("Character read: " + c);
    }

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    ZipInputStream inStream = new ZipInputStream(new FileInputStream("compressed.zip"));
    OutputStream outStream = new FileOutputStream("extracted.txt");

    byte[] buffer = new byte[1024];
    int read;//from  ww w.  ja  va2s.  c o  m
    ZipEntry entry;
    if ((entry = inStream.getNextEntry()) != null) {
        while ((read = inStream.read(buffer)) > 0) {
            outStream.write(buffer, 0, read);
        }
    }
    outStream.close();
    inStream.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    File aFile = new File("main.java");
    FileInputStream inFile = new FileInputStream(aFile);
    FileChannel inChannel = inFile.getChannel();
    ByteBuffer lengthBuf = ByteBuffer.allocate(8);
    while (true) {
        if (inChannel.read(lengthBuf) == -1) {
            break;
        }/* ww w .  j a  va2  s.  c  o  m*/
        lengthBuf.flip();
        int strLength = (int) lengthBuf.getDouble();
        ByteBuffer buf = ByteBuffer.allocate(2 * strLength + 8);
        if (inChannel.read(buf) == -1) {
            break;
        }
        buf.flip();
        byte[] strChars = new byte[2 * strLength];
        buf.get(strChars);
        System.out.println(strLength);
        System.out.println(ByteBuffer.wrap(strChars).asCharBuffer());
        System.out.println(buf.getLong());
        lengthBuf.clear();
    }
    inFile.close();
}