Pessoal observando o código pude ver muitas classes de notas poderiam ser substituída por uma enum, reduzindo bastante a quantidade de código. Pode ser feito dessa forma?

package br.com.schimidtsolutions.estudo.flyweight;

import java.util.Arrays;
import java.util.List;

public class Programa {

    public static void main(final String[] args) {

        List<NotaMusical> musica = Arrays.asList(NotaMusical.getInstance("do").get(),
                NotaMusical.getInstance("re").get(), NotaMusical.getInstance("mi").get(),
                NotaMusical.getInstance("fa").get(), NotaMusical.getInstance("fa").get(),
                NotaMusical.getInstance("fa").get(), NotaMusical.getInstance("do").get(),
                NotaMusical.getInstance("re").get(), NotaMusical.getInstance("do").get(),
                NotaMusical.getInstance("re").get(), NotaMusical.getInstance("re").get(),
                NotaMusical.getInstance("re").get(), NotaMusical.getInstance("do").get(),
                NotaMusical.getInstance("sol").get(), NotaMusical.getInstance("fa").get(),
                NotaMusical.getInstance("mi").get(), NotaMusical.getInstance("mi").get(),
                NotaMusical.getInstance("mi").get(), NotaMusical.getInstance("do").get(),
                NotaMusical.getInstance("re").get(), NotaMusical.getInstance("mi").get(),
                NotaMusical.getInstance("fa").get(), NotaMusical.getInstance("fa").get(),
                NotaMusical.getInstance("fa").get());

        Piano piano = new Piano();
        piano.tocar(musica);
    }
}

package br.com.schimidtsolutions.estudo.flyweight;

import java.util.Optional;

public enum NotaMusical {
    DO("C"), RE("D"), MI("E"), FA("F"), SOL("G"), LA("A"), SI("B");

    private String simbolo;

    private NotaMusical(final String simbolo) {
        this.simbolo = simbolo;
    }

    public String getSimbolo() {
        return simbolo;
    }

    public static Optional<NotaMusical> getInstance(final String nome) {
        NotaMusical notaMusicalEncontrada = null;
        String nomeEmMaiusculo = nome.toUpperCase();

        for (NotaMusical notaMusical : values()) {
            if (notaMusical.name().equals(nomeEmMaiusculo)) {
                notaMusicalEncontrada = notaMusical;
            }
        }

        return Optional.ofNullable(notaMusicalEncontrada);
    }
}

package br.com.schimidtsolutions.estudo.flyweight;

import java.util.List;
import java.util.stream.Collectors;

import org.jfugue.Player;

public class Piano {

    public void tocar(List<NotaMusical> musica){

        String simbolosNotasMusicais = musica.stream()
            .map(NotaMusical::getSimbolo)
            .collect(Collectors.joining(" "));

        Player player = new Player();
        player.play(simbolosNotasMusicais);
    }
}