How to add JavaFX runtime to Eclipse in Java 11? Code Answer

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I am getting the following error as Java 11 excluded the JavaFX as part of the latest version.

Error: JavaFX runtime components are missing, and are required to run
this application

So how can I add JavaFX to Eclipse in Java 11? Thanks.

Answer

Following the getting started guide, these are the required steps to run JavaFX 11 from Eclipse.

  1. Install Eclipse 2018-09 from here.

  2. Install JDK 11 from here.

  3. Add Java 11 as an installed JRE to Eclipse: Eclipse -> Window -> Preferences -> Java -> Installed JREs -> Add.

  4. Download JavaFX 11 ea from here.

  5. Create a User Library: Eclipse -> Window -> Preferences -> Java -> Build Path -> User Libraries -> New. Name it JavaFX11 and include the jars under the lib folder from JavaFX 11-ea.

  6. Create a Java project. You don’t need to add a module-path class. Make sure that you select Java 11 and you add the JavaFX11 library to the project’s modulepath.

  7. Add a package javafx11 and the main application class HelloFX:

    package javafx11;
    
    import javafx.application.Application;
    import javafx.scene.Scene;
    import javafx.scene.control.Label;
    import javafx.scene.layout.StackPane;
    import javafx.stage.Stage;
    
    
    public class HelloFX extends Application {
    
        @Override
        public void start(Stage stage) {
            String version = System.getProperty("java.version");
            Label l = new Label ("Hello, JavaFX 11, running on "+version);
            Scene scene = new Scene (new StackPane(l), 300, 200);
            stage.setScene(scene);
            stage.show();
        }
    
        public static void main(String[] args) {
            launch();
        }
    
    }

Note that the editor shouldn’t complain about JavaFX classes, as we have included the user library.

  1. Add runtime arguments. Edit the project’s run configuration, and add these VM arguments:

    –module-path C:Users<user>Downloadsjavafx-sdk-11lib –add-modules=javafx.controls

  2. Finally, run the project. It should work fine.

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