private int classify(List<Classifier> classifiers, Instance instance) { List<Double> predictedClasses = classifiers .stream() .map( classifier -> { try { return classifier.classifyInstance(instance); } catch (Exception e) { return -1.0; } }) .collect(Collectors.toList()); System.out.println("Resultados de clasificar muestra:"); System.out.println(predictedClasses); Map<Double, Long> predictedClassOcurrencesMap = predictedClasses .stream() .collect(Collectors.groupingBy(Function.identity(), Collectors.counting())); System.out.println("Mapa de ocurrencias:"); System.out.println(predictedClassOcurrencesMap); Double predictedClass = predictedClassOcurrencesMap .entrySet() .stream() .max(Map.Entry.comparingByValue()) .get() .getKey(); System.out.println("Resultado final:"); System.out.println(predictedClass); return predictedClass.intValue(); }