How to Integrate JavaFX Runtime into Eclipse for Java 11?

Integrating JavaFX Runtime into Eclipse for Java 11

Background:

Java 11 has excluded JavaFX as part of its latest version, resulting in "Error: JavaFX runtime components are missing" errors. This article provides a detailed guide on how to manually add JavaFX to Eclipse in Java 11.

Solution:

1. Install Eclipse 2018-09 and JDK 11:

   • Download and install Eclipse 2018-09 from the official website.
   • Download and install JDK 11 from the Java website.

2. Add JDK 11 to Eclipse:

   • Open Eclipse and navigate to "Window" → "Preferences" → "Java" → "Installed JREs".
   • Click "Add" and select the JDK 11 installation.

3. Obtain JavaFX 11:

   • Download JavaFX 11 ea from the OpenJDK website.

4. Create a User Library for JavaFX:

   • In Eclipse, go to "Window" → "Preferences" → "Libraries".
   • Create a new library named "JavaFX11".
   • Include the jars from the "lib" folder of the downloaded JavaFX 11 package.

5. Create a Java Project and Configure Module Path:

   • Create a new Java project and select Java 11.
   • Add the "JavaFX11" user library to the project's module path.

6. Sample JavaFX Application (HelloFX):

   • Create a package named "javafx11".
   • Add the following main application class:

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) {
        Label l = new Label("Hello, JavaFX 11");
        Scene scene = new Scene(new StackPane(l), 300, 200);
        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        launch();
    }
}

7. Configure VM Arguments for Runtime:

   • Edit the project's run configuration by right-clicking the project in the Package Explorer.
   • In the "VM Arguments" tab, add the following:

--module-path C:\Users<user>\Downloads\javafx-sdk-11\lib --add-modules=javafx.controls</user>

8. Run the Application:

   • Run the HelloFX application. It should execute successfully despite the absence of JavaFX in Java 11.

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