CMPE-103-Module-7-Method-Overloading-and-Overriding.pdf

CMPE 103 Module 7 METHOD OVERLOADING AND OVERRIDING At the end of the module, you should be able to: Recall the concept of Polymorphism discuss the two types of Polymorphism discuss the concept of Method Overloading demonstrate application programs on Method Overlo...

CMPE 103 Module 7 METHOD OVERLOADING AND OVERRIDING At the end of the module, you should be able to: Recall the concept of Polymorphism discuss the two types of Polymorphism discuss the concept of Method Overloading demonstrate application programs on Method Overloading discuss the concept of Method Overriding  Polymorphism The word “POLYMORPHISM” comes from two Greek words POLY and MORPHISM” which means many forms. It is important feature in Python that allows us to define methods in the child class with the same name as defined in their parent class. There are two types of Polymorphism: (1) Overloading (2) Overriding  Feature Method Overriding Method Overloading Defining multiple methods in the same scope Subclass provides a specific (usually in the same class) with the same name Definition implementation of a method already but different signatures (number or type of defined in its superclass. parameters). To change or extend the behavior of To allow different ways to call a method with Purpose an inherited method. different parameters. Must have the same name and Must have the same method name but different Method Signature parameters as the method in the parameters (not directly supported in Python). superclass. Does not require inheritance. Usually within the Requires a class hierarchy Inheritance same class. (inheritance). is used when you need to change the allows you to create multiple methods with the Summary behavior of inherited methods in a same name but different parameters. subclass. (not directly supported in Python). Method Overloading - Occurs when two or more methods in one class have the same method name but different parameters. - allows you to create multiple methods with the same name but different parameters. Method Overriding - Means having two methods with the same method name and parameters (i.e., METHOD SIGNATURE). One of the methods is in parent class and the other is in the child class. What do you think the output of this program? Operator Overloading and Overriding