Inheritance: Enables one class to acquire the properties and behavior of another class using the extends keyword.
Example:

class Animal {
 void eat() { System.out.println("This animal eats food."); }
}
class Dog extends Animal {
 void bark() { System.out.println("Dog barks."); }
}
Dog myDog = new Dog();
myDog.eat();
myDog.bark();