<dependencies> <dependency> <groupId>com.vaadin</groupId> <artifactId>vaadin-bom</artifactId> <version>14.5.1</version> <type>pom</type> <scope>import</scope> </dependency> <dependency> <groupId>com.vaadin</groupId> <artifactId>vaadin-core</artifactId> </dependency> </dependencies> @Route("form") public class MyFormView extends VerticalLayout { public MyFormView() { nameField.setRequired(true); emailField.setRequired(true); submitButton.addClickListener(e -> { } else { } }); add(nameField, emailField, submitButton); } }


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