Vaadin ui components are incompatable

Question

I have a view extended from com.vaadin.flow.component.orderedlayout.VerticalLayout I need to add a component com.vaadin.ui.ListSelect But the ListSelect does not extend Component, so i can't use it on my view. How can i arrange compatibility?

Answer 1

But the ListSelect does not extend Component

ListSelect extends com.vaadin.ui.Component . Flow requires that your components extend com.vaadin.flow.component.Component .

Based on your package names com.vaadin.ui vs com.vaadin.flow.component it looks like you are mixing up Vaadin 8 and Vaadin 14+ for example (or Vaadin 7 and some other Vaadin 14+ version).

You may have the both frameworks in your classpath, thus IDE autocompletion suggest you classes from both libraries.

If you are developing application with Vaadin 14 or newer, instead of ListSelect component use com.vaaadin.flow.component.select.Select .