In computer science
's object-oriented programming
, an abstract class
is one that is designed only
as a parent class
and from which child classes
may be derived, and which is not itself suitable for instantiation
. Abstract classes are often used to represent abstract
concepts or entities. The incomplete features of the abstract class are then shared by a group of sibling sub-classes which add different variations of the missing pieces.
Abstract classes are superclasses which contain abstract methods and are defined such that subclasses are to extend them by implementing the methods. The behaviors defined by such a class are "generic" and much of the class will be undefined and unimplemented. Before a class derived from an abstract class can be instantiated, it must implement particular methods for all the abstract methods of its parent classes.
All Wikipedia text
is available under the
terms of the GNU Free Documentation License