Bean Validation: Built-in constraints

'javax.validation.constraints' package provides number of annotations to do validations on data.

Below table summarizes the annotations provided by JSR-380 specification.

Annotation	Description
AssertFalse	The annotated element must be false.
AssertFalse.List	Defines several AssertFalse annotations on the same element.
AssertTrue	The annotated element must be true.
AssertTrue.List	Defines several AssertTrue annotations on the same element.
DecimalMax	The annotated element must be a number whose value must be lower or equal to the specified maximum.
DecimalMax.List	Defines several DecimalMax annotations on the same element.
DecimalMin	The annotated element must be a number whose value must be higher or equal to the specified minimum.
DecimalMin.List	Defines several DecimalMin annotations on the same element.
Digits	The annotated element must be a number within accepted range Supported types are: BigDecimal BigInteger CharSequence byte, short, int, long, and their respective wrapper types
Digits.List	Defines several Digits annotations on the same element.
Email	The string has to be a well-formed email address.
Email.List	Defines several @Email constraints on the same element.
Future	The annotated element must be an instant, date or time in the future.
Future.List	Defines several Future annotations on the same element.
FutureOrPresent	The annotated element must be an instant, date or time in the present or in the future.
FutureOrPresent.List	Defines several FutureOrPresent annotations on the same element.
Max	The annotated element must be a number whose value must be lower or equal to the specified maximum.
Max.List	Defines several Max annotations on the same element.
Min	The annotated element must be a number whose value must be higher or equal to the specified minimum.
Min.List	Defines several Min annotations on the same element.
Negative	The annotated element must be a strictly negative number (i.e.
Negative.List	Defines several Negative constraints on the same element.
NegativeOrZero	The annotated element must be a negative number or 0.
NegativeOrZero.List	Defines several NegativeOrZero constraints on the same element.
NotBlank	The annotated element must not be null and must contain at least one non-whitespace character.
NotBlank.List	Defines several @NotBlank constraints on the same element.
NotEmpty	The annotated element must not be null nor empty.
NotEmpty.List	Defines several @NotEmpty constraints on the same element.
NotNull	The annotated element must not be null.
NotNull.List	Defines several NotNull annotations on the same element.
Null	The annotated element must be null.
Null.List	Defines several Null annotations on the same element.
Past	The annotated element must be an instant, date or time in the past.
Past.List	Defines several Past annotations on the same element.
PastOrPresent	The annotated element must be an instant, date or time in the past or in the present.
PastOrPresent.List	Defines several PastOrPresent annotations on the same element.
Pattern	The annotated CharSequence must match the specified regular expression.
Pattern.List	Defines several Pattern annotations on the same element.
Positive	The annotated element must be a strictly positive number (i.e.
Positive.List	Defines several Positive constraints on the same element.
PositiveOrZero	The annotated element must be a positive number or 0.
PositiveOrZero.List	Defines several PositiveOrZero constraints on the same element.
Size	The annotated element size must be between the specified boundaries (included).
Size.List	Defines several Size annotations on the same element.

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