现代的方法是使用java Stream
。您可以像下面这样使用它:
Stream<OWLClass> stream = ontology.classesInSignature();
Set<OWLClass> set = ontology.classesInSignature().collect(Collectors.toSet());
OWLClass[] array = ontology.classesInSignature().toArray(OWLClass[]::new);
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