public void validate() {

		if (personBean.getFirstName().length() == 0) {
			addFieldError("personBean.firstName", "First name is required.");
		}

		if (personBean.getEmail().length() == 0) {
			addFieldError("personBean.email", "Email is required.");
		}

		if (personBean.getAge() < 18) {
			addFieldError("personBean.age", "Age is required and must be 18 or older");
		}
	}