Optional.ifPresentOrElse()

Code Comparison

Optional<User> user = findUser(id);
if (user.isPresent()) {
    greet(user.get());
} else {
    handleMissing();
}

findUser(id).ifPresentOrElse(
    this::greet,
    this::handleMissing
);

Why the modern way wins

📏

Both cases handled in one method call.

🚫

Eliminates the dangerous isPresent() + get() pattern.

🔗

Chains naturally after findUser() or any Optional-returning method.

Old Approach

if/else on Optional

Modern Approach

ifPresentOrElse()

JDK Support

Optional.ifPresentOrElse()

Available

Widely available since JDK 9 (Sept 2017)

How it works

ifPresentOrElse() takes a Consumer for the present case and a Runnable for the empty case. It avoids the isPresent/get anti-pattern.