04_Inheritance

Inheritance & Polymorphism

Inheritance allows you to define a new class based on an existing class. In this section, you'll explore inheritance, polymorphism, and abstract classes.

Topics Covered:

1. Inheritance - Reusing code from existing classes.
2. Polymorphism - Using a single interface to represent different types.
3. Super Keyword - Accessing parent class members.
4. Abstract Classes - Working with abstract classes and methods.

Example Programs:

• BoxWeight.java - Inherit class Box and add the weight variable.
• SuperDemo.java - Use the super keyword to call the parent class constructor.
• AbstractFigure.java - Demonstrate the use of abstract classes and methods.
• DynamicDispatch.java - Demonstrate dynamic method dispatch (runtime polymorphism).

Exercises:

1. Create a class BoxWeight that inherits from Box and adds a weight attribute.
2. Write a program to implement polymorphism using dynamic method dispatch.
3. Create an abstract class Figure and implement Rectangle and Triangle subclasses.

Continue to Packages & Interfaces after completing these.

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Files

• AbstractFigure.java: Demonstrates the use of abstract classes and methods.
• BoxWeight.java: Inherit class Box and add the weight variable.
• DynamicDispatch.java: Demonstrates dynamic method dispatch (runtime polymorphism).
• SuperDemo.java: Demonstrates the use of the super keyword to call the parent class constructor.