Coming from the standpoint of someone using your code, I see a method named getMonth, or getDay, or getYear, I expect a method with this naming scheme to return a value to me. Your instructions say to provide a class with 3 type int, a getter and setter for each field, and a displayDate method. That comes to three variables and seven methods in a class. Then you are to demonstrate the use of the 7 methods interacting with the 3 fields in another class.
You should research on keywords "java getters and setters" to see how your methods should look. Basically a getter will get and return the field you are after and a setter will set the field to the value supplied in the method call.
When you post your code please use [code=java] before your code and [/code] after your code instead of the quote block. This will keep the formatting and highlight keywords to make the code easier to read. Plus it makes the forum pretty and easy to my old eyes.