how could i connect the flashdrive to my java program, so that i could use it as an atm card?

Question

I will create an atm simulation program and when i insert a flashdrive my program can read the flashdrive.

Answer 1

You may save a file in the flash drive that may contain a special number, like a 16 digit card number. This number can be read by the program and if you have a match, you may print that the card has been read, and the user may remove it to continue in the transaction.