In
object-oriented programming is multiple inheritance, when a derived class
inherits directly from more than one base class. A sequential, multi-heirs will
not however referred to as multiple inheritance.
An application
example is the modeling of an amphibious vehicle that is both the attributes of
a land vehicle which also inherits from watercraft. Thus have both an
amphibious vehicle wheels numbers and a draft.
Few programming
languages offer the possibility of multiple-class inheritance, for example, C
+ +, CLOS, Eiffel, Perl and Python. As an objection to multiple-class
inheritance is often referred to, that they can make the design unnecessarily
complicated and opaque. It can therefore be ambiguity in the context of the
Diamond problem. In some programming languages, such as Oberon and its
further development, was therefore deliberately left out the possibility of
multiple implementation inheritance, which can be compensated by the use of
dual class.
However,
multiple interface inheritance is straightforward. In Java, Object Pascal (Delphi), C # and VB.NET, a class can inherit any number
of interfaces. Thus committed this class to provide the interface methods
available and thus makes something similar to the is-a relationship, the ratio
is as-relationship-forth.
With simple
class inheritance and multiple interface inheritance, most requirements for a
software design can be realized, without the disadvantages of full multiple
inheritance to have to accept.
