Abstract Classes
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What is Abstract Classes?
An abstract class is a class in object-oriented programming (OOP) that cannot be instantiated. Instead, it serves as a template or blueprint for other classes to inherit from. An abstract class can contain both abstract and non-abstract methods (abstract methods are methods that do not have any implementation, they just have a signature).
Abstract classes are used to provide a common interface and implementation for a group of related classes. They are also used to define common behavior that must be implemented by all subclasses. A subclass that inherits from an abstract class is called a concrete class, and it must provide an implementation for all the abstract methods declared in the parent class.
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Abstract Classes: common questions
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Is this Abstract Classes tutorial for beginners?
It is lesson 40 of 94 in the free Software Design and Architecture roadmap, in stage 4, Design Principles. If you are new to Software Design and Architecture, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.