Can you explain the concept of method overriding in Java?

Method overriding in Java is a mechanism that allows a subclass to provide its own implementation of a method that is already defined in the superclass.

Main points:

• The method in the subclass must have the same signature (name, parameters) and return type (or a compatible one).
• The access modifier cannot be more restrictive than that of the superclass method.
• It enables polymorphism: when calling a method through a reference to the superclass, the subclass's method will be invoked.

Example:

class Animal {
    void sound() {
        System.out.println("Some sound");
    }
}

class Dog extends Animal {
    @Override
    void sound() {
        System.out.println("Bark");
    }
}

public class Main {
    public static void main(String[] args) {
        Animal animal = new Dog();
        animal.sound(); // Will output "Bark"
    }
}

Here, the sound method is overridden in the Dog class, allowing the behavior to be changed.