derived class

In object-oriented programming, a subclass is a class that inherits some properties from its superclass.You can usually think of the subclass as being "a kind of" its superclass, as in a "a Manx is a kind of cat", or "a square is a kind of rectangle":A cat has fur, four legs, and a tailA Manx cat does not have a tail, but has all of the other characteristics listed aboveA rectangle has four sides with lengths w and hA square has all of the characteristics of a rectangle; in addition, w = h. Some point out that squares may be a type of rectangle mathematically but are rarely desired to be treated as such in computer programs since changing the width of a rectangle does not change its height whereas this is the case for a square.
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<programming> (Or "subclass") In object-oriented programming, a class that is derived from a base class by inheritance. The derived class contains all the features of the base class, but may have new features added or redefine existing features.
The synonym "subclass" is possibly confusing since the derived class has a superset of the base class's features.
Compare derived type.
(2001-09-14)