Quick start to Spring Boot 4, Java 25, and Vaadin 25

General
1

Hi all,

Just tested that if you have an existing standard Spring Boot 3 and Vaadin 24 project, the steps upgrading that to Spring Boot 4 ( Spring Framework 7) and the latest Vaadin/Java versions are pretty simple.:

Start by updating the Spring Boot version by updating the project parent:

<parent> 
    <groupId>org.springframework.boot</groupId> 
    <artifactId>spring-boot-starter-parent</artifactId> 
    <version>4.0.0</version> 
   <relativePath/> <!-- lookup parent from repository -->
</parent>

Update Java and Vaadin versions to 25 (latest beta for Vaadin):

<java.version>25</java.version>
<vaadin.version>25.0.0-beta8</vaadin.version>

Add back Vaadin development mode and Copilot for local development:

<dependency>
    <groupId>com.vaadin</groupId>
    <artifactId>vaadin-dev</artifactId>
    <optional>true</optional> 
</dependency>

Use the Lumo stylesheet annotation in your Application.java :

@StyleSheet(Lumo.STYLESHEET)

In IntelliJ IDEA you should also use jbr-25 to run your application locally to get the HotSwap benefits.

Now if we only could use the compact class for main :slight_smile:

3 Likes
2

I saw different strategies to include vaadin-dev for the upcoming next major version - either with or without optional=true.

Why did you choose not to apply optional=true?

3

<optional>true</optional> is the official way and also what you get from e.g. start.vaadin.com if you choose Vaadin 25 there.

1 Like
4

Wait, Copilot works with Java 25 now? I thought it only worked with Java 21.

5

You mean the hot swap (dcevm) features? For those Copilot requires JBR and it wasn’t long ago when Java 25 version of that was released.

1 Like