> Markdown version of [UIInitListener](https://vaadin.com/docs/v10/flow/advanced/tutorial-ui-init-listener). Section index: [llms.txt](https://vaadin.com/docs/v10/flow/llms.txt)

# UIInitListener

A UIInitListener can be used to receive an event each time a new UI has been created and initialized.

The ideal place to add UIInitListeners would be inside a [VaadinServiceInitListener](https://vaadin.com/docs/v10/flow/advanced/tutorial-service-init-listener.md)

```java
public class ServiceListener implements VaadinServiceInitListener {

    @Override
    public void serviceInit(ServiceInitEvent event) {
        event.getSource().addUIInitListener(
                initEvent -> LoggerFactory.getLogger(getClass())
                        .info("A new UI has been initialized!"));
    }
}
```