public class Main {
        public static void main(final String[] args) throws Exception {
            final String tagged = "World_NN Big_RBS old_RB stupid_JJ";
    
            int nouns = 0;
            int adjectives = 0;
            int adverbs = 0;
    
            final String[] tokens = tagged.split(" ");
    
            for (final String token : tokens) {
                final int lastUnderscoreIndex = token.lastIndexOf("_");
                final String realToken = token.substring(lastUnderscoreIndex + 1);
                if ("NN".equals(realToken)) {
                    nouns++;
                }
                if ("JJ".equals(realToken)) {
                    adjectives++;
                }
                if ("RB".equals(realToken) || "RBS".equals(realToken)) {
                    adverbs++;
                }
            }
    
            System.out.println(String.format("Nouns: %d Adjectives: %d, Adverbs: %d", nouns, adjectives, adverbs));
        }
    }