What is @UtilityClass used for?

@UtilityClass (experimental) converts a class into a static utility class: it makes the class final, generates a private constructor that throws if somehow invoked via reflection, and marks every field and method in the class as static automatically — the standard boilerplate for a class that's meant to be a bag of static helper methods, never instantiated.

@UtilityClass
public class MathUtils {
    public int square(int x) {
        return x * x;
    }
}
//  equivalent to a final class with a private constructor
//  and `square` implicitly treated as `public static int square(int x)`

Without it, writing a proper utility class by hand means remembering to mark the class final, add a private no-op constructor, and mark every single method static individually — small but easy-to-forget details that @UtilityClass handles for you in one line.

Invest now in Acorns!!! 🚀
Join Acorns and get your $5 bonus!

Acorns is a micro-investing app that automatically invests your "spare change" from daily purchases into diversified, expert-built portfolios of ETFs. It is designed for beginners, allowing you to start investing with as little as $5. The service automates saving and investing. Disclosure: I may receive a referral bonus.

Invest now!!! Get Free equity stock (US, UK only)!

Use Robinhood app to invest in stocks. It is safe and secure. Use the Referral link to claim your free stock when you sign up!.

The Robinhood app makes it easy to trade stocks, crypto and more.

Webull! Receive free stock by signing up using the link: Webull signup.