Java Inheritance Explained With a Real E-Commerce Example

Inheritance in Java allows a child class to extend a parent class, reusing shared fields and methods while adding its own unique attributes. A practical example uses an e-commerce platform selling electronics, clothing, and groceries, where all products share a name, price, and seller, but differ in details like warranty period or expiry date. A base Product class holds the common fields, while subclasses like Electronics extend it using the extends keyword and initialize inherited fields via the super() constructor call. Child classes can also override parent methods to display category-specific information instead of the generic output. This approach eliminates code repetition and makes future updates, such as adding a discount field, easier to manage across all product types.