how to get all the classes defined in an ontology, using owlapi in a none deprecated way

Question

How can I find all the defined classes using owlapi in Java? I'm aware of the deprecated getClassesInSignature method, but the documentation (JavaDocs) are lacking a bit in regards, what should be used instead?

Answer 1

The modern way is to use the java Stream. You can use it like the following :

    Stream<OWLClass> stream = ontology.classesInSignature();
    Set<OWLClass> set = ontology.classesInSignature().collect(Collectors.toSet());
    OWLClass[] array = ontology.classesInSignature().toArray(OWLClass[]::new);