Inheritance

Inheritance

1. An important feature in OOP used to extend a class.

   • Parent-Child relationship between classes
     • The child class can be extendable until you declare it as "final"
       • Use "final" keyword to prevent classes from being subclassed or extended.
   • Use the "extends" keyword after class name and before parent class.
     • Example: public class Child extends Parent{}

2. Allows you to change behaviors of an existing class to better suit your need s.

3. Multiple inheritance is allowed in C++ unlike JAVA.

4. The "is-a" relationship is a special relationship between the subclass and the superclass.

   • Superclass being a big class and the subclasses are the different types of the superclass.
   • A subclass inherits all public methods and fields from the superclass.
   • Must not assign an instance of a subclass to a reference variable of the parent type.