Java Optional.orElse() is a method in the Java Optional class that returns the value inside the Optional if present, or a specified default value if the Optional is empty. It helps avoid NullPointerException and provides a cleaner, more expressive alternative to null checks. Introduced in Java 2014 with Java 8, orElse() is commonly used in functional programming scenarios where handling nulls explicitly is impractical.

https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html