Parameter of orElse() is evaluated, even when having a non-empty Optional.

Supplier method of orElseGet passed as an argument is only executed when an Optional value isn’t present.

Therefore, using orElseGet() will save computing time.

Non compliant Code Example

Optional.of("creedengo").orElse(getUnpredictedMethod());

Compliant Code Example

Optional.of("creedengo").orElseGet(() -> getUnpredictedMethod());

randomClass.orElse(getUnpredictedMethod());