Definition von Unterklassen
Syntax und Entwicklung von Unterklassen
Erfahren Sie, wie Unterklassen implementiert werden, wie Superklassen-Methoden aus Unterklassen aufgerufen werden und wie kontrolliert wird, welche Klassen von einer Superklasse abgeleitet werden.
Tools
| Class Diagram Viewer | Create diagrams with class details and hierarchies |
Funktionen
superclasses | Names of superclasses |
Klassen
matlab.diagram.ClassViewer | Create class diagrams in Class Diagram Viewer app |
matlab.mixin.Heterogeneous | Superclass for heterogeneous array formation |
Themen
Klassenhierarchien
- Hierarchies of Classes — Concepts
Organizing classes into hierarchies facilitates the reuse of code. - Designing Heterogeneous Class Hierarchies
Heterogeneous arrays can contain objects of different class, but all objects in the array must derive from a common superclass.
Erstellen von Unterklassen
- Subclass Syntax
Specify superclasses on the classdef line after the class name. - Design Subclass Constructors
Specify superclasses on theclassdefline in the class file. - Call Superclass Methods on Subclass Objects
Subclass methods can override inherited superclass methods. Subclass methods can call the superclass method that they override. - Control Sequence of Constructor Calls
Control the order in which MATLAB® constructs objects in class hierarchy. - Modify Inherited Methods
Subclasses can modify inherited methods. - Modify Inherited Properties
Subclasses can modify inherited properties that are abstract or private. - Subclassing Multiple Classes
Multiple inheritance can lead to conflicting definitions. All superclasses must be free of conflicts in definition. - Specify Allowed Subclasses
Classes can restrict the classes that can derive from it.
Kompatibilität von Handle-Klassen
- Handle Compatible Classes
Enable both handle and value classes to derive from a specific class. - How to Define Handle-Compatible Classes
Handle compatible classes have applications for mixin and abstract superclasses. - Methods for Handle-Compatible Classes
Handle-compatible class methods must work with both handle and value objects. - Handle-Compatible Classes and Heterogeneous Arrays
Heterogeneous class hierarchies impose certain restrictions when classes are handle compatible.
Zugriffskontrolle auf Klassenmitglieder
- Class Members Access
Determine what level of access is allowed for properties, methods, and events.
