validation with Help @pattern

UserTest.java

 user.setEmail("eqwqe@ewe.qwe");
        
        ValidatorFactory vf = Validation.buildDefaultValidatorFactory();
        Validator validator = vf.getValidator();
        Set<ConstraintViolation<Object>> constraintViolations = validator.validate(user);

        System.out.println(String.format("Кол-во ошибок: %d",
                constraintViolations.size()));
        System.out.println("constraintViolations = " + constraintViolations.isEmpty());


        for (ConstraintViolation<Object> cv : constraintViolations)
            System.out.println(String.format("Внимание, ошибка! property: [%s], value: [%s], message: [%s]",cv.getPropertyPath(), cv.getInvalidValue(), cv.getMessage()));