Hi,
I have using vaadin technology i need validate combobox, radio button and textbox still now am using form validation in my application so please ow can i solve this issue if any idea let me know.
If you want to validate the fields you need to add a validator to them in order to make validation works as expected, you can read more in depth about it in the book of vaadin
5.19 Form , point 5.19.3 Validating Form Input.
For example, extracted from book:
// Postal code that must be 5 digits (10000-99999).
TextField field = new TextField("Postal Code");
field.setColumns(5);
// Create the validator
Validator postalCodeValidator = new RegexpValidator(
"[1-9]
[0-9]
{4}", "Postal code must be a number 10000-99999.");
field.addValidator(postalCodeValidator);
// Set the form to act immediately on user input. This is
// necessary for the validation of the fields to occur immediately
// when the input focus changes and not just on commit.
form.setImmediate(true);
// The Commit button calls form.commit().
Button commit = new Button("Commit", form, "commit");