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 {
    Properties properties = new Properties();
    try {/*w w  w.j a v a 2s.  c o  m*/
        properties.load(new FileInputStream("filename.properties"));
    } catch (IOException e) {
    }
    String string = properties.getProperty("a.b");
    properties.setProperty("a.b", "new value");
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    ZipInputStream in = new ZipInputStream(new FileInputStream("source.zip"));
    OutputStream out = new FileOutputStream("target");
    byte[] buf = new byte[1024];
    int len;//ww  w. j av  a  2  s  .c  o  m
    while ((len = in.read(buf)) > 0) {
        out.write(buf, 0, len);
    }
    out.close();
    in.close();
}

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();

    inChannel.transferTo(0, inChannel.size(), outChannel);

    inChannel.close();//from  www  . j  av  a  2s.  c  o m
    outChannel.close();
}

From source file:Main.java

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

    byte[] buffer = new byte[5];

    // new input stream created
    InputStream is = new FileInputStream("C://test.txt");

    System.out.println("Characters printed:");

    // read stream data into buffer
    is.read(buffer);/*  w  w w.  ja va  2 s  .  c om*/

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

        // prints character
        System.out.print(c);
    }
    is.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    BufferedInputStream is = new BufferedInputStream(new FileInputStream("a.exe"));
    byte[] bytes = new byte[1024];
    int len = 0;//from   w  ww  .java 2s . c  o  m

    while ((len = is.read(bytes)) >= 0) {
        new CRC32().update(bytes, 0, len);
    }
    is.close();
    System.out.println(Arrays.toString(bytes));

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    File file = new File("C:/String.txt");
    StringBuffer strContent = new StringBuffer();
    FileInputStream fin = new FileInputStream(file);
    int ch;//  www.ja va2 s  . co m
    while ((ch = fin.read()) != -1) {
        strContent.append((char) ch);
    }
    fin.close();
    System.out.println(strContent);
}

From source file:Main.java

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

    outStream.putNextEntry(new ZipEntry("test.txt"));

    byte[] buffer = new byte[1024];
    int bytesRead;

    while ((bytesRead = inStream.read(buffer)) > 0) {
        outStream.write(buffer, 0, bytesRead);
    }//from   w w w. j  a  v  a 2 s  .c om

    outStream.closeEntry();
    outStream.close();
    inStream.close();
}

From source file:Main.java

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

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

    // input stream converted to buffered input stream
    BufferedInputStream bis = new BufferedInputStream(iStream);

    // read and print characters one by one
    System.out.println((char) bis.read());
    System.out.println((char) bis.read());
    System.out.println((char) bis.read());

    // mark is set on the input stream
    bis.mark(0);/*from  w  w w . j  ava  2s  .  c  om*/
    System.out.println((char) bis.read());
    System.out.println("reset() invoked");

    // reset is called
    bis.reset();

    // read and print characters
    System.out.println((char) bis.read());
    System.out.println((char) bis.read());

}

From source file:Main.java

public static void main(String[] args) throws IOException {
    char[] cbuf = new char[5];

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

    // reads into the char buffer
    int i = isr.read(cbuf, 2, 3);

    // prints the number of characters
    System.out.println("Number of characters read: " + i);

    // for each character in the character buffer
    for (char c : cbuf) {
        // for empty character
        if (((int) c) == 0)
            c = '-';

        System.out.println(c);//ww w  .  j  a v  a2 s . c o m
    }
    isr.close();
}

From source file:Main.java

public static void main(String args[]) throws IOException {
    SequenceInputStream inStream;
    FileInputStream f1 = new FileInputStream("file1.java");
    FileInputStream f2 = new FileInputStream("file2.java");
    inStream = new SequenceInputStream(f1, f2);
    boolean eof = false;
    int byteCount = 0;
    while (!eof) {
        int c = inStream.read();
        if (c == -1)
            eof = true;/*from   w w  w  . j  av a 2s.  c  om*/
        else {
            System.out.print((char) c);
            ++byteCount;
        }
    }
    System.out.println(byteCount + " bytes were read");
    inStream.close();
    f1.close();
    f2.close();
}