public boolean equals(Object obj) {
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Pessoa other = (Pessoa) obj;
		if (matricula == null) {
			if (other.matricula != null)
				return false;
		 	} else if (!matricula.equals(other.matricula))
		 		return false;
		 
		return true;
	}