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.txt");
    FileInputStream inputFile = null;
    try {/*from  w  w  w . ja v  a2  s . com*/
        inputFile = new FileInputStream(aFile);
    } catch (FileNotFoundException e) {
        e.printStackTrace(System.err);
        System.exit(1);
    }
}

From source file:Main.java

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

    FileInputStream is = new FileInputStream("c:/test.txt");

    BufferedInputStream bis = new BufferedInputStream(is);

    ByteArrayOutputStream baos = new ByteArrayOutputStream();

    BufferedOutputStream bos = new BufferedOutputStream(baos);

    int value;//from  w  w  w.  j a v  a2 s.  com

    while ((value = bis.read()) != -1) {
        bos.write(value);
    }

    bos.flush();

    for (byte b : baos.toByteArray()) {

        char c = (char) b;
        System.out.println(c);
    }

}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    File file = new File("c:\\a.bat");
    InputStream is = new FileInputStream(file);

    long length = file.length();
    if (length > Integer.MAX_VALUE) {
        System.out.println("File is too large");
    }/*ww w. ja va 2  s . c  o m*/

    byte[] bytes = new byte[(int) length];

    int offset = 0;
    int numRead = 0;
    while (numRead >= 0) {
        numRead = is.read(bytes, offset, bytes.length - offset);
        offset += numRead;
    }

    if (offset < bytes.length) {
        throw new IOException("Could not completely read file " + file.getName());
    }
    is.close();
    System.out.println(new String(bytes));
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    String fromFileName = "from.txt";
    String toFileName = "to.txt";
    FileChannel in = new FileInputStream(fromFileName).getChannel();
    FileChannel out = new FileOutputStream(toFileName).getChannel();
    in.transferTo(0, (int) in.size(), out);
    in.close();/*from   w  ww  . j  av a 2  s  .  com*/
    out.close();
}

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    MessageDigest m = MessageDigest.getInstance("MD5");
    FileInputStream fin = new FileInputStream(args[0]);
    DigestInputStream din = new DigestInputStream(fin, m);
    while (din.read() != -1)
        ;//from  w  w w. ja  v  a  2 s .co m

    byte s[] = m.digest();
    for (int i = 0; i < s.length; i++) {
        System.out.print(Integer.toHexString((0x000000ff & s[i]) | 0xffffff00).substring(6));
    }
}

From source file:Main.java

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

    byte[] buf = new byte[5];

    char c;//from  ww  w  .j av  a 2  s.c  o  m

    FileInputStream fis = new FileInputStream("C:/test.txt");
    LineNumberInputStream lnis = new LineNumberInputStream(fis);

    int i = lnis.read(buf, 2, 3);
    System.out.println("The number of char read: " + i);

    for (byte b : buf) {
        if (b == 0)
            c = '-';
        else
            c = (char) b;

        System.out.print(c);
    }

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    File f = new File("your.ttf");
    FileInputStream in = new FileInputStream(f);
    Font dynamicFont = Font.createFont(Font.TRUETYPE_FONT, in);
    Font dynamicFont32Pt = dynamicFont.deriveFont(32f);

    JLabel testLabel = new JLabel(dynamicFont.getName());
    testLabel.setFont(dynamicFont32Pt);/*w  w  w . ja v a 2 s  . com*/
    JFrame frame = new JFrame("Font Loading Demo");
    frame.getContentPane().add(testLabel);
    frame.pack();
    frame.setVisible(true);
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    ObjectInputStream inputStream = new ObjectInputStream(new FileInputStream("yourFile.dat"));

    Object obj = null;//from   ww  w  .jav a  2 s  . c om

    while ((obj = inputStream.readObject()) != null) {
        if (obj instanceof Person) {
            System.out.println(((Person) obj).toString());
        }
    }
    inputStream.close();
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    String fromFileName = args[0];
    String toFileName = args[1];//from w w w. j a  v  a 2 s .  c  o  m
    FileChannel in = new FileInputStream(fromFileName).getChannel();
    FileChannel out = new FileOutputStream(toFileName).getChannel();
    in.transferTo(0, (int) in.size(), out);
    in.close();
    out.close();
}

From source file:Main.java

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

    InputStream in = new FileInputStream("test.txt");
    OutputStream out = System.out;

    PrintableOutputStream pout = new PrintableOutputStream(out);
    for (int c = in.read(); c != -1; c = in.read()) {
        pout.write(c);//from w ww . j a v  a  2 s .c o m
    }
    out.close();
}