CS202 Java-16
Java Identifiers
lA Java identifier must start with a letter or underscore or dollar sign, and be followed by zero or more letters (A-Z, a-z), digits (0-9), underscores, or dollar signs.
lVALID
l age_of_dog   taxRateY2K
l HourlyEmployee   ageOfDog
lNOT VALID  (Why?)
l age#                2000TaxRate         Age-Of-Dog