public static void main(String[] args) throws IOException, InterruptedException {
        
        FileReader fr = new FileReader("C:\\a.mp3");
        FileWriter fw = new FileWriter("D:\\a.mp3");
        int i = 0;
        while((i = fr.read()) != -1 ) {
            fw.write(i);
        }
        fr.close();
        fw.close();
        }