Hello,
Im building a
Java programm, that takes an ID. This ID (
String) must be 16 characters long and with specific structure:
AN AN AN AN AN N N N N N N AN AN AN A A
AN: Alphanumeric
N: Number (0-9)
A: Alphabetic (A-Z)
Until now im converting the String to charArray, and create another char array that contains letters A-Z but i dont know how to check if characters from 0-4 is letters or numbers etc...
thank you