Dúvida enum

public enum Arabico {  
     QUATRO (4), 
     CINCO (5), 
     SEIS (6), 
     SETE (7), DEZ(10), ONZE(11), DOZE(12), UM(1), DOIS(2), TRES(3);

     Arabico (int valor) { this.valor = valor; }
     public int getArabico() { return valor; }
     private int valor;  
 }

 class TesteArabico {
    public static void main (String[] args) {
        System.out.println (Arabico.UM);
        System.out.println (Arabico.UM.getArabico());
    }
 }