Since Java 11, JavaFX was removed from the SDK. It is now in its own separate module, and if you want to use it in your application, you will need to specifically include it.
Regarding, "to make the application modular":
Spring 5 and Spring Boot are not friendly with Java Platform Module System (JPMS). It won't really be built for modules until Spring 6/Springboot 3 is released.
I do try the modular approach with Spring Boot 2. However, compilation
failed due to a known Lombok
error.
Regarding, "to add command line arguments for module path and modules names. The Maven command doesn't take arguments "--module-path" nor "--add-modules":
You can use non-modular approach without --module-path and --add-modules.
Maven configuration is pretty straightforward.
Firstly, Add the JavaFX modules you need as maven dependencies. For instance:
<properties>
<java.version>17</java.version>
<javafx.version>17.0.2</javafx.version>
</properties>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-controls</artifactId>
<version>${javafx.version}</version>
</dependency>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-fxml</artifactId>
<version>${javafx.version}</version>
</dependency>
The project can be built and run using Spring Boot Maven Plugin
NOTE: There is a maven plugin available for running JavaFX 11+ applications. So far, it is not required since the application will be packed and run using Spring Boot.
You may find a working example here, showcasing how to bootstrap JavaFX applications within Spring Boot application.
How to bootstrap JavaFX application within Spring Boot application?
The bootstrap process is heavily inspired by Mr. Awesome Josh Long’s
Spring Tips:
JavaFX
installment.
Instead of calling SpringBootApplication.run() use a custom bootstrap class inheriting from JavaFX Application. This is needed to initialize JavaFX correctly.
JavaFxApplication class does the heavy lifting for creating a proper JavaFX application with initialized Spring Context. It's responsible for:
- Set Spring Boot web server type to NONE.
- Programmatically create a Spring Boot context in the
Application#init() method.
- Kick off application logic by sending a
StageReadyEvent containing the primary Stage as payload.
- Support graceful shutdown for both Spring context and JavaFX platform.
