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[]) throws Exception {
    CertificateFactory cf = CertificateFactory.getInstance("X.509");
    List mylist = new ArrayList();
    for (int i = 0; i < args.length; i++) {
        FileInputStream in = new FileInputStream(args[i]);
        Certificate c = cf.generateCertificate(in);
        mylist.add(c);//from  w  w w  .j  a  v a 2 s  . com
    }
    CertPath cp = cf.generateCertPath(mylist);
    List cplist = cp.getCertificates();
    Object[] o = cplist.toArray();
    for (int i = 0; i < o.length; i++) {
        X509Certificate c = (X509Certificate) o[i];
        System.out.println(c.getSubjectDN());
        byte[] pbk = c.getPublicKey().getEncoded();
        for (int j = 0; j < pbk.length; j++) {
            System.out.print(pbk[j] + ",");
        }
        System.out.println("\nIssued by " + c.getIssuerDN());
    }
}

From source file:Main.java

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

    byte[] cbuf = new byte[10];

    FileOutputStream out = new FileOutputStream("test.txt");
    ObjectOutputStream oout = new ObjectOutputStream(out);

    oout.writeUTF("Hello World from java2s.com");
    oout.flush();/*from   w ww  . java2 s.  co  m*/
    oout.close();
    ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));

    ois.read(cbuf, 0, 7);

    for (int i = 0; i < 7; i++) {
        System.out.print((char) cbuf[i]);
    }
    ois.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    FileOutputStream fos = new FileOutputStream("books.dat");
    ObjectOutputStream oos = new ObjectOutputStream(fos);

    Book book = new Book("1", "Java", "A");

    oos.writeObject(book);/*from w  w  w .ja  v a2s. co m*/
    oos.flush();
    oos.close();
    FileInputStream fis = new FileInputStream("books.dat");
    ObjectInputStream ois = new ObjectInputStream(fis);
    book = (Book) ois.readObject();
    System.out.println(book.toString());

    ois.close();
}

From source file:Main.java

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

    byte[] b = { 65, 66, 67, 68, 69 };
    int i = 0;// w  w w  .  ja  v a 2s  .  co m

    FileOutputStream fos = new FileOutputStream("C://test.txt");

    // writes byte to the output stream
    fos.write(b, 2, 3);

    // flushes the content to the underlying stream
    fos.flush();

    // create new file input stream
    FileInputStream fis = new FileInputStream("C://test.txt");

    // read till the end of the file
    while ((i = fis.read()) != -1) {
        // convert integer to character
        char c = (char) i;
        System.out.print(c);
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    String[] filenames = new String[] { "filename1", "filename2" };
    byte[] buf = new byte[1024];
    String outFilename = "outfile.zip";
    ZipOutputStream out = new ZipOutputStream(new FileOutputStream(outFilename));

    for (int i = 0; i < filenames.length; i++) {
        FileInputStream in = new FileInputStream(filenames[i]);
        out.putNextEntry(new ZipEntry(filenames[i]));
        int len;/*from w ww.j  a v a 2s . co m*/
        while ((len = in.read(buf)) > 0) {
            out.write(buf, 0, len);
        }
        out.closeEntry();
        in.close();
    }
    out.close();
}

From source file:Main.java

public static void main(String[] args) throws IOException {
    short[] s = { -5, 32767 };
    FileOutputStream fos = new FileOutputStream("c:\\test.txt");
    DataOutputStream dos = new DataOutputStream(fos);
    for (short j : s) {
        dos.writeShort(j);/*  w ww . j  ava 2s .  c om*/
    }
    dos.flush();
    InputStream is = new FileInputStream("c:\\test.txt");
    DataInputStream dis = new DataInputStream(is);
    while (dis.available() > 0) {
        int k = dis.readUnsignedShort();
        System.out.print(k);
    }
}

From source file:Main.java

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

    float f = 1.23456f;

    FileOutputStream out = new FileOutputStream("test.txt");
    ObjectOutputStream oout = new ObjectOutputStream(out);

    oout.writeFloat(f);/* w  ww .j a  v a  2  s  .  co m*/
    oout.writeFloat(1234.56789f);
    oout.flush();
    oout.close();

    ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));

    System.out.println(ois.readFloat());

    System.out.println(ois.readFloat());
    ois.close();
}

From source file:Main.java

public static void main(String[] a) throws Exception {
    List list = Arrays.asList(new String[] { "A", "B", "C", "D" });

    FileOutputStream fos = new FileOutputStream("list.ser");
    ObjectOutputStream oos = new ObjectOutputStream(fos);
    oos.writeObject(list);//from ww  w.ja  v a 2  s  .  c  o  m
    oos.close();

    FileInputStream fis = new FileInputStream("list.ser");
    ObjectInputStream ois = new ObjectInputStream(fis);
    List anotherList = (List) ois.readObject();
    ois.close();

    System.out.println(anotherList);
}

From source file:MainClass.java

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

    List list = Arrays.asList(new String[] { "A", "B", "C", "D" });
    FileOutputStream fos = new FileOutputStream("list.ser");
    ObjectOutputStream oos = new ObjectOutputStream(fos);
    oos.writeObject(list);//from   w  w  w.  j ava2s  . c  o m
    oos.close();

    FileInputStream fis = new FileInputStream("list.ser");
    ObjectInputStream ois = new ObjectInputStream(fis);
    List anotherList = (List) ois.readObject();
    ois.close();

    System.out.println(anotherList);
}

From source file:Main.java

public static void main(String[] args) {
    File inputFile = new File("test1.txt");
    if (!inputFile.exists()) {
        System.out.println("The input file " + inputFile.getAbsolutePath() + "  does  not  exist.");
        System.out.println("Aborted the   file reading process.");
        return;//from   www  .  ja  v  a  2s.com
    }
    try (FileChannel fileChannel = new FileInputStream(inputFile).getChannel()) {
        ByteBuffer buffer = ByteBuffer.allocate(1024);
        while (fileChannel.read(buffer) > 0) {
            buffer.flip();
            while (buffer.hasRemaining()) {
                byte b = buffer.get();
                System.out.print((char) b);
            }
            buffer.clear();
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
}