Inheritance

Inheritance

1. (Parent, Super) Class

   • Abstract
     • An Abstract Class is a class that cannot be instantiated as an object. This type of class does not require an abstract method; however, if an abstract method is located within a class, the class must be abstract.
   • Private
     • A private method is where the class cannot be instantiated as an object, and subclasses can not be established from this class.
   • Public
     • A public method is where the class can be instantiated as an object and all the methods within the class are inherited.
   • Protected
     • A private method is where the class cannot be instantiated as an object; however, all public subclasses can be instantiated, and the subclasses still inherit the parent’s methods.
   • OverLoading
     • Method Overloading is when a method contains the same method name; however, the method header is different from the method in the class or parent class.

2. (Child, Sub) Class

   • Abstract
     • An Abstract Class is a class that cannot be instantiated as an object. This type of class does not require an abstract method; however, if an abstract method is located within a class, the class must be abstract.
   • Private
     • A private method is where the class cannot be instantiated as an object, and subclasses can not be established from this class.
   • Public
     • A public method is where the class can be instantiated as an object and all the methods within the class are inherited.
   • Protected
     • A private method is where the class cannot be instantiated as an object; however, all public subclasses can be instantiated, and the subclasses still inherit the parent’s methods.
   • Super
     • KeyWord used to call the superclass version of a method or field.
   • Overloading
     • Method Overloading is when a method contains the same method name; however, the method header is different from the method in the class or parent class.
   • Overriding
     • Method Overriding is when a method established in the parent class is changed or altered in the subclass, while maintaining the same method header.