How can you determine if an Optional object contains a non-null value?

To determine whether an Optional object contains a non-null (non-empty) value, the isPresent() method is usually used.

Example in Java:

Optional<String> optional = Optional.ofNullable(getValue());
if (optional.isPresent()) {
    // Value is present
    String value = optional.get();
} else {
    // Value is absent
}

If isPresent() returns true, it means there is a value inside the Optional; otherwise, the object is empty.