Subclass (computer science)

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 cat is a kind of cat", or "a square is a kind of rectangle".

cat	rectangle
has fur has four legs has a tail	has four sides, lengths w and h
manx cat	square
does not have a tail	all sides have same length, w=b