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) throws Exception {

    FileInputStream is = new FileInputStream("c:/test.txt");
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    BufferedOutputStream bos = new BufferedOutputStream(baos);

}

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    FileInputStream fis = new FileInputStream("test");
    ObjectInputStream ois = new ObjectInputStream(fis);
    Object o = ois.readObject();/*from www .  j  a v a2s .c  o m*/
    if (!(o instanceof String)) {
        System.out.println("Unexpected data in file");
        System.exit(-1);
    }
    String data = (String) o;
    System.out.println("Got message " + data);
    o = ois.readObject();
    if (!(o instanceof byte[])) {
        System.out.println("Unexpected data in file");
        System.exit(-1);
    }
    byte origDigest[] = (byte[]) o;
    byte pass[] = "aaa".getBytes();
    byte buf[] = data.getBytes();
    MessageDigest md = MessageDigest.getInstance("SHA");
    md.update(pass);
    md.update(buf);
    byte digest1[] = md.digest();
    md.update(pass);
    md.update(digest1);
    System.out.println(MessageDigest.isEqual(md.digest(), origDigest));
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    InputStream is = new FileInputStream("c:/test.txt");

    InputStreamReader isr = new InputStreamReader(is);

    BufferedReader br = new BufferedReader(isr);

    char[] cbuf = new char[is.available()];

    br.read(cbuf, 2, 10);/*from  ww  w . ja va2 s .  co  m*/

    for (char c : cbuf) {
        if (c == (char) 0) {
            c = '*';
        }
        // prints characters
        System.out.print(c);
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    File file = new File("C:/ReadFile.txt");
    FileInputStream fin = new FileInputStream(file);

    BufferedInputStream bin = new BufferedInputStream(fin);
    while (bin.available() > 0) {
        System.out.println((char) bin.read());
    }/*from   w  w  w. j a  v a  2 s  .  com*/
    bin.close();
}

From source file:Main.java

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

    int i = 0;/*w w w  .  jav a  2  s. com*/

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

    // read till the end of the file
    while ((i = fis.read()) != -1) {
        // get file channel
        FileChannel fc = fis.getChannel();

        // get channel position
        long pos = fc.position();

        char c = (char) i;

        System.out.println("No of bytes read: " + pos);
        System.out.println("Char read: " + c);
    }
}

From source file:Main.java

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

    FileInputStream fis = new FileInputStream("C:/test.txt");
    InputStreamReader isr = new InputStreamReader(fis, Charset.defaultCharset().name());

    // input stream reader is closed
    isr.close();//from w w w  . j a va 2 s .c o  m
    System.out.print("close() invoked");

    // read() called after closed method
    int i = isr.read();
    char c = (char) i;
    System.out.println(c);

}

From source file:Main.java

public static void main(String args[]) throws IOException {
    SequenceInputStream inStream;
    FileInputStream f1 = new FileInputStream("ByteArrayIOApp.java");
    FileInputStream f2 = new FileInputStream("FileIOApp.java");
    inStream = new SequenceInputStream(f1, f2);

    byte[] arrayBytes = new byte[100];
    int c = inStream.read(arrayBytes, 10, 10);

    inStream.close();/*  w ww. j av  a  2 s . com*/
    f1.close();
    f2.close();
}

From source file:Main.java

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

    FileInputStream fis = new FileInputStream("C:/test.txt");
    InputStreamReader isr = new InputStreamReader(fis, Charset.defaultCharset());

    // input stream reader is closed
    isr.close();/*from   ww w.  java 2  s.  c  om*/
    System.out.print("close() invoked");

    // read() called after closed method
    int i = isr.read();
    char c = (char) i;
    System.out.println(c);

}

From source file:Main.java

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

    FileInputStream fis = new FileInputStream("C:/test.txt");
    InputStreamReader isr = new InputStreamReader(fis, Charset.defaultCharset().newDecoder());

    // input stream reader is closed
    isr.close();//from   w w  w .  j av a 2  s  .co m
    System.out.print("close() invoked");

    // read() called after closed method
    int i = isr.read();
    char c = (char) i;
    System.out.println(c);

}

From source file:Main.java

public static void main(String args[]) throws IOException {
    FileInputStream fis = new FileInputStream("FileChannelExample.java");
    FileChannel fc = fis.getChannel();

    ByteBuffer bb = ByteBuffer.allocate((int) fc.size());

    fc.read(bb);//from  w w w .ja va  2 s.co m
    bb.flip();

    String fileContent = new String(bb.array());

    fc.close();
    fc = null;

    System.out.println("fileContent = " + fileContent);
}