static public void copyFileB(File fileIn, OutputStream out, int bufferSize) throws IOException {
    try (FileInputStream fin = new FileInputStream(fileIn)) {
      InputStream in = new BufferedInputStream(fin);
      IO.copyB(in, out, bufferSize);
    }
  }
static public void copyFileB(File fileIn, OutputStream out, int bufferSize) throws IOException {
    try (FileInputStream fin = new FileInputStream(fileIn)) {
      InputStream in = new BufferedInputStream(fin);
      IO.copyB(in, out, bufferSize);
    }
  }
static public void copyFileB ( File fileIn , OutputStream out , int bufferSize ) throws IOException { try ( FileInputStream fin = new FileInputStream ( fileIn ) ) { InputStream in = new BufferedInputStream ( fin ) ; IO . copyB ( in , out , bufferSize ) ; } }
copy file to output stream, specify internal buffer size

@param fileIn     copy this file
@param out        copy to this stream
@param bufferSize internal buffer size.
@throws java.io.IOException on io error
copy file to output stream specify internal buffer size