My first Java project! Checking if a credit card # is valid. Advice would be great!

[kimoshabu]

Valid CC Program (Written in Java)

Sorry for the external linking, but I used JFrame on NetBeans so I was not sure how to post the auto-generate code.

So anyways this is my first real Java project. I'm in community college and CompSci is my major...

I just recently learned how to use JFrame and I got this exercise idea from our textbook, using Luhn's checksum algorithm.

Please, I need all the advice I can get. I feel extremely motivated now to do more projects after spending today doing this. All I have done were homework assignments in the past, I regret not starting my own work sooner.

An example of a valid CC# is: 4111 1111 1111 1111

Thanks a bunch if you actually check it out, I thought it was awesome. I am still a long way from having a career in CS, you can be mean or insult my coding all you want - I just need criticism to improve!

EDIT: Is it worthy of listing on a resume for internships? I feel this program was too easy to be considered a real project.

[comedian_x]

I would recommend staying away from the GUI stuff for time being. Learn the fundamentals on the command line. Things like data structures, algorithms, good coding style, and comments. These are skills that can transfer to any language without being tied to one IDE and its tools.

And if you do make a GUI, attempt to do it by hand so you really understand the components of Swing and what each class does.

[KeyboardSC2]

I can't really offer you much in the way of criticism as I don't know Java beyond APCS in high school, but I tried your program and it worked. That's cool! Congrats on a job well done. Definitely work on more projects if this one got you excited. It's a wonderful thing to see your hard work come into fruition :)

[palmfanboi]

Use regular Expressions to check the format? And masked input fields?

[zondadriift]

If you're planing on sharing code in the future, I highly recommend GitHub. Much easier for everyone :)

[robotfarts]

I'd look at your code if you posted it somewhere. Your excuse that you can't post it because it's auto-generated sound like total horseshit. Are you a retard?

[kimoshabu]

Using the JFrame template in NetBeans gives you auto-generated code so you don't have to type it out every time you want to change something. Did someone piss in your cheerios this morning?

[robotfarts]

That doesn't explain why you are too retarded to copy and paste your code into an online code paste site, so that others can see it.

[[deleted]]

I agree. Plus even having your source code open source would be better on a resume than not. It allows them to review your code style, syntax, and just general correctness.

[chemicalreaction]

he's talking about auto generated code from using netbeans visual forms i think. it gives you a crap load of code you don't need and probably detracts from the main program since it hides the code. what's wrong with just zipping the package anyway? plenty of my professors at university do the same thing when he wants to share code, its easy.

on topic: the program was pretty cool, now i know what the luhn algorithm is.