How to make vaadin validation with java validation api this is my code below

Flow
2

maybie without declare each component ui

3

just declare once

4

@nifty-tasmanian have you checked out the bean validator API? https://vaadin.com/blog/introduction-to-java-bean-validation

5

the tutorial should have Form Layout sir, but i dont have that

6

the constraintviolation objects should have enough information for you to set the appropriate condition on your field objects

7

so that, we need FormLayout for making validation sir?

8 
 val validation = registrationBinder.validate();

              if (validation.isOk()) {
              } else {
                validation
                    .getFieldValidationErrors()
                    .forEach(
                        error -> {
                          val field = error.getField();
                          if (field instanceof HasValidation hv) {
                            error.getMessage().ifPresent(hv::setErrorMessage);
                          }
                        });
              }
9

You don’t need a form layout–all of your fields should implement HasValidation and you can just use something like that ^^ to set the messages