Hi .. I need topic for my java project and I need to use inheritance in the project I'm thinking of book store or employees , nut how can I use inheritance in book store or employees what class will I inherit from

you can create a class Employee, and two subclasses, Manager and Salesperson.

Class Book, subclasses Paperback, Hardback, eBook?

super class book and subclass by category
so you can inherit book class in your categorized subclass
Also you can create Employee class as super class and
subclass by contract basis employee and permanent employee.
or you can use any other criteria.