Section 3 - Object Oriented Programming class

I understood the whole concept of linking 2 classes but don't understand who do we link 2 different class in notepad???
When I try to run MyOwnCar.java it give errors because the other half of that class is in car.java
please helo

Try each class different file. Only execute steps given prior to assignment.

store both class in different files but in same folder. it will run .for example i create file name stu_name.java and define class stu_name including function print_name to print name. then i create another file link_class.java in which i create object of class stu_name and call function print_name. Save both files in same folder.