Project Description -This project demonstrates inheritance, abstraction, and polymorphism in Java through a phone call billing system: -PhoneCall is an abstract superclass representing any phone call.
The abstract keyword is a non-access modifier, used for classes and methods: Abstract class: is a restricted class that cannot be used to create objects (to access it, it must be inherited from ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results