Write a Java Program AND JUnit test:

Do NOT use regular expressions or any classes or methods that make use of regular expressions. Use Java API for methods in the String, StringBuilder, or StringBuffer classes and use those methods or develop your own algorithms to implement the required functionality of these methods.

/** * Returns true if the current string contains one or more characters * before an '@' character, followed by either "vcu.edu" or "mymail.vcu.edu" * For example, RodneyTheRam@vcu.edu a valid vcu email address also * and RamFan@hotmail.com is not. * * @return true if current string is formated as valid VCU email address * Returns false otherwise.

Do NOT use regular expressions. */ boolean isValidVCUEmail();

/** * Returns the number of characters that are digits in the current string * if two (and no more than two) of the same digit appear side by side. * * @return Number of double-digits in the current string */ int countDoubleDigits();