There are two separate conditions under which you can redefine superclass properties:
The value of the superclass property
Abstract attribute is
The values of the superclass property
GetAccess attributes are
If a superclass defines a property as abstract, the subclass must implement a concrete version of this property or the subclass is also abstract. Superclasses define abstract properties to create a consistent interface among subclasses.
If a superclass defines a property with private access, then only the superclass can access this property. The subclass can implement a different property with the same name.
When superclass and subclass define a property with the same name, methods that refer to this property access the property of the class defining the method.
For example, if a subclass property has the same name as a superclass private property, and a method of the superclass references the property name, MATLAB® accesses the property defined by the superclass.
Consider the following classes,
classdef Super properties (Access = private) Prop = 2 end methods function p = superMethod(obj) p = obj.Prop; end end end
classdef Sub < Super properties Prop = 1 end end
If you create an instance of the
Sub class and use it to call the superclass method, MATLAB accesses the private property of the superclass:
subObj = Sub
subObj = Sub with properties: Prop: 1
ans = 2