// Possible enhancements you can do:
//               Check for zero before division.
//               Additional operations: mod, square root, sign change, ...
//               Make this work with doubles, BigInteger, or ...
//               Format double results with DecimalFormat
//               Add keyboard listener.
//             Change to RPN (Reverse Polish Notation)
//            How would you communicate an error to the caller? Ans: Exceptions.
//           about the change (except perhaps to add a "." for floating-point input).

Hi, i just finished my Java Course. and as Final Project i am going to Create a Simple YouTube Downloader.
but i Don't Know where to Start? and what things i will need to Complete This Project?

in Short Swing is Awesome i never find it messy
i also try JavaFx which is cool somehow for animation and high Graphics
but the good part is that we can use both Swing and JavaFx together ......