Java

Inheritance
Allows one class to acquire properties and methods of another class
A subclass can reuse the fields and methods of the parent class without rewriting the code
A subclass can add its own fields and methods or modify existing ones to extend functionality

class Animal { void eat() { System.out.println("Animal eats"); } } class Dog extends Animal { void bark() { System.out.println("Dog barks"); } public static void main(String[] args) { Dog d = new Dog(); d.eat(); d.bark(); } } 

Output:
Animal eats
Dog barks