11. DataOutputStream, writing binary file

• Code that writes data to a binary file

  
      DataOutputStream out =
          new DataOutputStream(
          new BufferedOutputStream(
          new FileOutputStream("books.bin")));
  
      // write a Book object to the file
      out.writeUTF(book.getCode());
      out.writeUTF(book.getDescription());
      out.writeDouble(book.getPrice());
  
      // flush data to the file and close the output stream 
      out.close();