The Principles of Objects-Oriented Programs(OOP) In Java.

Object-oriented programming (OOP) is a programming paradigm in which programs are designed using ??????? ??? ???????.

A class is a template or blueprint from which objects are made from. Classes define the properties and methods that an object can have, and objects are unique instances of a class.

??????-???????? ??????????? ??? ? ???? ??????????; ?????????????, ???????????, ???????????, and ????????????.

????????????? hides internal details but exposes data & methods via a public interface, preventing unintentional changes. E.g. — a player can view a pet's age but can't accidentally change it. But they can run methods avail on the public interface like changing a pet's name.

??????????? allows classes to inherit properties and methods from other classes, making code reusable and organized. E.g. — A "SuperPet" class that extends from "Pet "and would inherit "age", "name", "eat", and "speak"; while defining new behaviors like "fly"

???????????? is a principle that enables objects to change their form by extending or overriding existing methods. E.g. A "Dog" & "Cat" class that extended from the "Pet", shouldn't share the same "speak" method. You'd override it to have its own logic like "woof" or "meow"

??????????? reduces complexity by only surfacing the information needed for a given context or use case. E.g. A “Player” class doesn’t need to know how the “eat” method works in the “Pet” class, it just needs to know how to interact with it — i.e. its input & output.

The above is the detailed content of The Principles of Objects-Oriented Programs(OOP) In Java.. For more information, please follow other related articles on the PHP Chinese website!