Hi!

First of all, you should avoid to name your class Date. It is not a good coding style naming classes after a java object class.

Next, avoid to use too many nested if and else statements. Instead use switch/case statements wherever you can.

Now to your problem. If I get you right, all you need is to write is a new Java class containing a main method (similiar to the one you already have in your Date class). Read in the user input, call the Date's class constructor with current date as parameters, code a FOR loop and call nextDay method in Date class as often as the user specified.