The final Keyword in Java: Understanding Its Impact and Usage

The `final` keyword in Java is used to make variables, methods, and classes unchangeable. A final variable cannot be reassigned, a final method cannot be overridden, and a final class cannot be subclassed. This ensures stability in your code, making it more predictable and secure.

Here’s an example using the `final` keyword with variables:

public class FinalExample {
    public static void main(String[] args) {
        final int MAX_VALUE = 100;
        System.out.println(MAX_VALUE);
    }
}
            

In this code, the `MAX_VALUE` variable is marked as `final`, meaning its value cannot be changed. The final keyword is often used in constants and to enforce immutability in Java, improving code clarity and preventing unintended behavior.