I created a java program to calculate the perimeter of a rectangle (please see attached) and my professor responded with this (which is what I need help with).. "Could you maybe define a class...

I created a java program to calculate the perimeter of a rectangle (please see attached) and my professor responded with this (which is what I need help with).. "Could you maybe define a class Rectangle having width and height as attributes and methods to compute the area and perimeter and then use that class in another class that contains the main method? In the main method you could create a Rectangle object and call its perimeter method."