ifPresentOrElseConsumer

The ifPresentOrElseConsumer method is a functional interface provided in Java's Optional class. It allows for handling both the presence and absence of an optional value in a concise manner. This method takes two arguments: a Consumer that will be executed if the Optional contains a value, and a Runnable that will be executed if the Optional is empty.

The purpose of ifPresentOrElseConsumer is to avoid verbose if-else statements when dealing with Optional objects. Instead of checking if a value is present using isPresent() and then performing actions, this method consolidates the logic. If the Optional has a value, the provided Consumer function receives that value and performs its defined operation. If the Optional is empty, the provided Runnable function is executed, typically for side effects or default behavior.

This method is particularly useful for scenarios where you need to either process a value if it exists or execute a fallback action if it doesn't. It enhances code readability and reduces the potential for NullPointerExceptions by encouraging the use of Optional as intended. The signature is typically void ifPresentOrElse(Consumer<? super T> action, Runnable emptyAction).