Java EE 8 Cookbook

How it works...

Let's check each declared constraint:

    @NotBlank (message = "Name should not be blank")    @Size (min = 4, max = 10,message = "Name should be between            4 and 10 characters")    private String name;

The @NotBlank annotation will deny not only null values, but also white spaces values, and @Size speaks for itself:

    @Email (message = "Invalid e-mail format")    @NotBlank (message = "E-mail shoud not be blank")    private String email;

The @Email constraint will check the email string format:

    @PastOrPresent (message = "Created date should be past or present")    @NotNull (message = "Create date should not be null")    private LocalDate created;

@PastOrPresent will constrain LocalDate to be in the past or until the present date. It can't be in the ...