Hibernate @Digits Validation for Double type

I am attempting to validate a Double field with the help of Hibernate validation API - using @Digits annotation

<areaLength>0</areaLength>
<buildArea>0.0</buildArea>

@Digits(integer=10, fraction=0)
private Long areaLength = null; // Here areaLength = 0 

@Digits(integer=20, fraction=0)
private Double buildArea = null; // Here buildArea = 0.0

Here areaLength has no constraint violation,

but buildArea is getting a constraint violation, saying

buildArea numeric value out of bounds (<20 digits>.<0 digits> expected)

No violation for 10.0, But getting violation for 0.0.

Does anybody know the reason?

Full Code :

public class ValidationTest {

    public static void main(String a[]) {
        Vehicle vehBean = new Vehicle();
        try {
            if (vehBean != null) {
                ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
                Validator validator = factory.getValidator();
                Set<ConstraintViolation<Vehicle>> violations = validator.validate(vehBean);
                if (violations!= null && violations.size() > 0) {
                    for (ConstraintViolation<Vehicle> violation : violations) {
                        System.out.println("Validation problem : " + violation.getMessage());
                    }
                }
            }
        } catch(Exception e) {
            throw e;
        }
    }
}

class Vehicle {
    @Digits(integer=20, fraction=0)
    private Double buildArea = 0.0; 
}

Validation problem : numeric value out of bounds (<20 digits>.<0 digits> expected)

Solution

You've restricted the amount of digits for fraction part to 0 meaning no fraction allowed, even though there isn't any in your 0.0 but you should confirm that that is the case, I think you have a Double value that is 0 < x < 0.1 You can also try using Float for the same field, and check if that has the same trouble?

The value of the field or property must be a number within a specified range. The integer element specifies the maximum integral digits for the number, and the fraction element specifies the maximum fractional digits for the number.

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