Abstract Class

A class that cannot be created directly, but must be inherited.

What is an Abstract Class?

An abstract class is a class that you cannot create an instance of. It is a class that you must extend in order to use it. An abstract class does not yet have enough details to be useful.

Abstract classes define some data and functionality that all child classes have in common.

Abstract classes are one way to introduce polymorphism into your project.

public abstract class Building
{
    // variables and functions here
}

Level: Journeyman · More OOP terms at this level

Updated October 12, 2026