CMIS 242

1.
Add to the Date class the code for a correct increment method.

Remember the rule for leap years:
A year is a leap year if it is divisible by 4, unless it is divisible
by 100 (in which case it's not a leap year) UNLESS it's also divisible
by 400 (in which case it's a leap year):
 year%4==0 && year%100!=0 || year%400==0 
(1900 was not a leap year, but 2000 is, 2100 will not be).


2. 
Add to the Date class the code  for a correct isValidDay method.


These are coding exercises, i.e. you must create algorithms to do
them, you can not use some built-in classes or methods in Java to solve
them.

Note that the DateDriver.java already invokes both of these methods.
Make no changes to it.

Submit your Date.java as an attachment.  I will use the DateDriver.java as is.