I'm trying to get a Maven/JavaFX project, created from the javafx-archetype-fxml archetype and unedited, to run in the latest version of IntelliJ. To be clear, the project is a direct copy of that archetype; I'm just trying to get an example working.
Suffice it to say I'm a complete beginner with Maven, so I'm could just be missing an obvious step here.
Maven build went smoothly, and the project's pom.xml looks the way the JavaFX documentation says it should.
I left it unchanged except for updating the maven.compiler.source and maven.compiler.target properties, as well as the release property in the maven-compiler-plugin, to 16, the JDK version I'm using for the project:
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-
v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.epre</groupId>
<artifactId>jfx-sandbox</artifactId>
<version>0.0.1-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>16</maven.compiler.source>
<maven.compiler.target>16</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-controls</artifactId>
<version>17</version>
</dependency>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-fxml</artifactId>
<version>17</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<release>16</release>
</configuration>
</plugin>
<plugin>
<groupId>org.openjfx</groupId>
<artifactId>javafx-maven-plugin</artifactId>
<version>0.0.6</version>
<executions>
<execution>
<!-- Default configuration for running -->
<!-- Usage: mvn clean javafx:run -->
<id>default-cli</id>
<configuration>
<mainClass>com.epre.App</mainClass>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
The dependencies show up in the Maven tab, and I'm able to reload the project with no problems. Similarly, I can see that the javafx-base, -controls, -fxml, -graphics, and their corresponding :win libraries have been added to the project's External Libraries (pic):
However, when I try to run the project's Main class, IntelliJ throws ~15 errors telling me that many of the packages I'm trying to import from don't exist.
java: package javafx.application does not exist
java: package javafx.fxml does not exist
java: package javafx.scene does not exist
java: package javafx.scene does not exist
java: package javafx.stage does not exist
java: cannot find symbol class Application
java: cannot find symbol class Scene
java: method does not override or implement a method from a supertype
java: cannot find symbol class Stage
java: cannot find symbol class Scene
java: cannot find symbol class Parent
java: cannot find symbol class FXMLLoader
java: cannot find symbol class FXMLLoader
java: cannot find symbol method launch()
This is the Main class, just to show what sort of packages I'm trying to import from:
package com.epre;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
import java.io.IOException;
/**
* JavaFX App
*/
public class App extends Application {
private static Scene scene;
@Override
public void start(Stage stage) throws IOException {
scene = new Scene(loadFXML("primary"), 640, 480);
stage.setScene(scene);
stage.show();
}
static void setRoot(String fxml) throws IOException {
scene.setRoot(loadFXML(fxml));
}
private static Parent loadFXML(String fxml) throws IOException {
FXMLLoader fxmlLoader = new FXMLLoader(App.class.getResource(fxml + ".fxml"));
return fxmlLoader.load();
}
public static void main(String[] args) {
launch();
}
}
I've done some searching and tried fixing every unrelated problem with the project, just to try and isolate the issue, i.e.
- Changing the project language level to 16
- Changing the project module's Per-module bytecode version to 16
- Replacing instances of "11" in the pom.xml with "16" as mentioned earlier
- Opening the project in an older version of IntelliJ
None of these have produced any change, though.
In previous non-Maven projects that also used JavaFX, I had to add all the packages the project needed to its module-info.java. This is the only step I can think of that I haven't taken, since it's my understanding that I shouldn't have to deal with it if I'm declaring those packages as dependencies in the pom.xml?
EDIT: I'm assuming I don't need to set up a module-info.java because the JavaFX documentation never mentions it as a step for creating a Maven+JavaFK project: https://openjfx.io/openjfx-docs/.
The JavaFX and IntelliJ > Non-modular with Maven section of the documentation simply states that upon loading the project, "The JavaFX classes will be recognized."
EDIT 2: I managed to solve the package errors and get the program running by changing the JavaFX dependencies in the pom.xml to version 16 instead of 17. Not sure why a single version would break the program like it did, though I suspect there was probably a change in how JavaFX is bundled/distributed.
See Question&Answers more detail:
os 
