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[] args) {

    for (int i = 0; i < args.length; i++) {
        if (args[i].toLowerCase().endsWith(".gz")) {
            try {
                FileInputStream fin = new FileInputStream(args[i]);
                GZIPInputStream gzin = new GZIPInputStream(fin);
                FileOutputStream fout = new FileOutputStream(args[i].substring(0, args[i].length() - 3));
                for (int c = gzin.read(); c != -1; c = gzin.read()) {
                    fout.write(c);/* www. j a  v  a 2  s .c o  m*/
                }
                fout.close();
            } catch (IOException ex) {
                System.err.println(ex);
            }
        } else {
            System.err.println(args[i] + " does not appear to be a gzipped file.");
        }
    }
}

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]);
    java.security.cert.Certificate c = cf.generateCertificate(in);
    in.close();//from  ww w .  j av  a  2 s . c  o m

    X509Certificate t = (X509Certificate) c;
    System.out.println(t.getVersion());
    System.out.println(t.getSerialNumber().toString(16));
    System.out.println(t.getSubjectDN());
    System.out.println(t.getIssuerDN());
    System.out.println(t.getNotBefore());
    System.out.println(t.getNotAfter());
    System.out.println(t.getSigAlgName());
    byte[] sig = t.getSignature();
    System.out.println(new BigInteger(sig).toString(16));
    PublicKey pk = t.getPublicKey();
    byte[] pkenc = pk.getEncoded();
    for (int i = 0; i < pkenc.length; i++) {
        System.out.print(pkenc[i] + ",");
    }
}

From source file:MainClass.java

public static void main(String args[]) {
    FileInputStream fileInputStream;
    FileChannel fileChannel;//from  w w w.  ja v a2  s .  c  o m
    long fileSize;
    MappedByteBuffer mBuf;

    try {
        fileInputStream = new FileInputStream("test.txt");
        fileChannel = fileInputStream.getChannel();
        fileSize = fileChannel.size();
        mBuf = fileChannel.map(FileChannel.MapMode.READ_ONLY, 0, fileSize);

        for (int i = 0; i < fileSize; i++)
            System.out.print((char) mBuf.get());

        fileChannel.close();
        fileInputStream.close();
    } catch (IOException exc) {
        System.out.println(exc);
        System.exit(1);
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    Pattern pattern = Pattern.compile("pattern");
    FileInputStream input = new FileInputStream("file.txt");
    FileChannel channel = input.getChannel();

    ByteBuffer bbuf = channel.map(FileChannel.MapMode.READ_ONLY, 0, (int) channel.size());
    CharBuffer cbuf = Charset.forName("8859_1").newDecoder().decode(bbuf);

    Matcher matcher = pattern.matcher(cbuf);
    while (matcher.find()) {
        String match = matcher.group();
        System.out.println(match);
    }//w w  w. j a v  a  2s .co m
}

From source file:Main.java

public static void main(String[] args) {

    try {// w  ww  . j ava2 s  .  c  om
        // 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:Main.java

public static void main(String[] argv) throws Exception {
    String outFilename = "outfile.gzip";
    GZIPOutputStream out = new GZIPOutputStream(new FileOutputStream(outFilename));

    String inFilename = "infilename";
    FileInputStream in = new FileInputStream(inFilename);

    byte[] buf = new byte[1024];
    int len;//from   www.  jav a2 s  .c o  m
    while ((len = in.read(buf)) > 0) {
        out.write(buf, 0, len);
    }
    in.close();

    out.finish();
    out.close();
}

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);
    Set s = crl.getRevokedCertificates();
    if (s != null && s.isEmpty() == false) {
        Iterator t = s.iterator();
        while (t.hasNext()) {
            X509CRLEntry entry = (X509CRLEntry) t.next();
            System.out.println("serial number = " + entry.getSerialNumber().toString(16));
            System.out.println("revocation date = " + entry.getRevocationDate());
            System.out.println("extensions = " + entry.hasExtensions());
        }//from w ww  .j a  v a2 s  .  c o  m
    }
    in.close();
}

From source file:MainClass.java

public static void main(String[] args) {
    File aFile = new File("C:/test.bin");
    FileInputStream inFile = null;
    try {/*from   w w w .j a va 2 s  . c o  m*/
        inFile = new FileInputStream(aFile);
    } catch (FileNotFoundException e) {
        e.printStackTrace(System.err);
    }
    FileChannel inChannel = inFile.getChannel();
    final int PRIMECOUNT = 6;
    ByteBuffer buf = ByteBuffer.allocate(8 * PRIMECOUNT);
    long[] primes = new long[PRIMECOUNT];
    try {
        while (inChannel.read(buf) != -1) {
            ((ByteBuffer) (buf.flip())).asLongBuffer().get(primes);
            for (long prime : primes) {
                System.out.printf("%10d", prime);
            }
            buf.clear();
        }
        inFile.close();
    } catch (IOException e) {
        e.printStackTrace(System.err);
    }
}

From source file:Main.java

  public static void main(String[] argv) throws Exception {
  String inFilename = "infile.zip";
  ZipInputStream in = new ZipInputStream(new FileInputStream(inFilename));

  ZipEntry entry = in.getNextEntry();

  String outFilename = "o";
  OutputStream out = new FileOutputStream(outFilename);

  byte[] buf = new byte[1024];
  int len;/*from www .  j  ava 2s  .c o  m*/
  while ((len = in.read(buf)) > 0) {
    out.write(buf, 0, len);
  }

  out.close();
  in.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Pack200.Unpacker unpacker = Pack200.newUnpacker();
    JarOutputStream out = new JarOutputStream(new FileOutputStream("outName"));
    InputStream in = new FileInputStream("inName");
    // in = new GZIPInputStream(in);
    unpacker.unpack(in, out);//from   w  ww  . j a v  a  2s. co  m
    out.close();
}