public static void main(String[] args) throws Exception {
FileInputStream inputStream = new FileInputStream("c:/data.txt");
FileOutputStream outputStream = new FileOutputStream("c:/result.txt");

byte[] buffer = new byte[1000];
while (inputStream.available() > 0){

int count = inputStream.read(buffer);
outputStream.write(buffer, 0, count);
}

inputStream.close();
outputStream.close();
}

private void writeFile(File file, byte[] bytes) {
    BufferedOutputStream bos = null;

    try {
        bos = new BufferedOutputStream(new FileOutputStream(file));
        bos.write(bytes);
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (image != null) {
            image.close();
        }
        if (null != bos) {
            try {
                bos.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}