CMP Credit Card Validation Amanuensis  CMP Credit Card Validation Amanuensis

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This Applet will help you tell if a credit card number is valid. It will also tell you which of the following credit card companies issued the card: Amex, Diners Club, Carte Blanche, Discover, enRoute, JCB, MasterCard or Visa.

It validates the prefix and the checkdigit. It does not contact the credit card company to ensure that number has actually been issued and that the account is in good standing.

The Applet is designed for cannibalising so that you can steal the code you need from it to include in your own programs.

The Credit Card Validator amanuensis is also available with Java source to download. You can optionally run Credit Card Validation Amanuensis as an application by invoking the com.mindprod.creditcard. ValidateCreditCard class.

On the Internet, approximately 70% of transactions are Visa, 27% are Mastercard and 3% are American Express. Sorry, you need Java 1.5+ to run this Applet.

If, creditcard, the above Credit Card Validator Java Applet (that can also be run as an application) does not work…

  1. This Java Applet (that can also be run as an application) needs Java 1.5 or later, best version 1.5.0_22 or later, version 1.6.0_17 recommended and a recent browser.
  2. You should see the Applet hybrid above looking much like the screenshot. If you don’t, the following should help you get it working:
  3. If you are using Microsoft Internet Explorer, try another browser. Seriously. Microsoft has taken great pains, over and over, to screw up Java and every other multi-platform standardisation.
  4. If you are using Internet Explorer 7 or 8, you must allow blocked content permission for Active X to run. This also gives permission to Java to run. Click the Information bar, and then click Allow blocked content. Unfortunately, this also allows dangerous ActiveX code to run. However, you must do this in order to get access to perfectly-safe Java Applets running in a sandbox. This is part of Microsoft’s war on Java. Don’t put up with it! Use a different browser.
  5. Especially if this Applet hybrid has worked before, try clearing the browser cache and rebooting.
  6. To ensure your Java is up to date, check with Wassup. First, download it and run it as an application independent of your browser, then run it online as an Applet to add the complication of your browser.
  7. If the above Applet hybrid does not work, check the Java console for error messages.
  8. If the above Applet hybrid does not work, you might have better luck with the downloadable version.
  9. If you are using Mac OS X and would like an improved Look and Feel, download the QuaQua look & feel from randelshofer.ch/quaqua. UnZip the contained quaqua.jar and install it in ~/Library/Java/Extensions or one of the other ext dirs.
  10. If you still can’t get the program working click HELP for more detail.
  11. If you can’t get the above Applet hybrid working after trying the advice above and from the HELP button below, have bugs to report or ideas to improve the program or its documentation, please send me an email atemail Roedy Green.
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No information will be sent over the web, either to CMP or to the credit card companies. You can verify this by looking at the source code.
PackageVersionReleasedLicenceLanguageNotes 
creditcard
Credit Card Validator		 1.8 2008-03-06 free Java
summary ❘ facts ❘ screenshot ❘ browse source repository for the current version of Credit Card Validator. Applet to validate credit card numbers and tell who issued the card.
download Credit Card Validator Java source and compiled class files to run on your own machine as an application or Applet.

First install the most recent Java.

To install, extract the zip download with WinZip, (or similar unzip utility) into any directory you please, often J:\ — ticking off the “user folder names” option.

To check out the corresponding source from the Subversion repository, use the TortoiseSVN repo-browser to
access creditcard source in repository with [Tortoise] Subversion client on wush.net/svn/mindprod/com/mindprod/creditcard/.

After you have installed the jar, you can run it as an application. Type:

java -jar J:\com\mindprod\creditcard\creditcard.jar

adjusting as necessary to account for where the jar file is.

download ASP PAD XML program description for the current version of Credit Card Validator.

Credit Card Validator is free. Full source included. You may even include the source code, modified or unmodified in commercial programs that you write and distribute. Non-military use only.
    
 
CMP homejump to top You can get the freshest copy of this page from: or possibly from your local J: drive (Java virtual drive/mindprod.com website mirror)
http://mindprod.com/applet/creditcard.html J:\mindprod\applet\creditcard.html
CMP logofeedback Please email your feedback for publication, errors, omissions, typos, formatting errors, ambiguities, unclear wording, broken/redirected link reports, suggestions to improve this page or comments to Roedy Green : feedback email
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