Eclipse and Maven: Error occured during initialization of boot layer

Question

Buongiorno,

I have a Java Project with some extra dependencies and I wanted to let Maven handle it.

So I added all dependencies in the pom.xml and Updated the Project with Maven. In my Maven Dependencies I have every package I need to run the programm, however I cant run my project again because I get this error:

Error occurred during initialization of boot layer
java.lang.module.FindException: Module javafx.base not found

Do I still have to add the modules in my VM Arguments (Run config) or are they not needed since they are added threw maven?

If I run it without any VM Arguments I get this:

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

Here is a Screenshot from the Maven Dependencies:

EDIT: I am able to make the build work but If I want to run the created .JAR File it gives me this error:

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

my pom.xml:

<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>kantinen_managementsystem</groupId>
  <artifactId>kantinen_managementsystem</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>Test KMS Maven</name>
  <description>Test Maven Build</description>
  
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
      <maven.compiler.source>16</maven.compiler.source>
    <maven.compiler.target>16</maven.compiler.target>
        <java.version>16</java.version>
    </properties>  
  
  <build>
    <sourceDirectory>src</sourceDirectory>
    <resources>
      <resource>
        <directory>images</directory>
        <excludes>
          <exclude>**/*.java</exclude>
        </excludes>
      </resource>
    </resources>
    <plugins>
    
  <plugin>
        <artifactId>maven-jar-plugin</artifactId>
        <version>3.2.0</version>
        <configuration>
          <archive>
            <manifest>
                <addClasspath>true</addClasspath>
              <mainClass>KMS.Main</mainClass>
            </manifest>
          </archive>
        </configuration>
      </plugin>    
    
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.8.1</version>
        <configuration>
            <archive>
            <manifest>
                <addClasspath>true</addClasspath>
            <mainClass>KMS.Main</mainClass>
            </manifest>
            </archive>
          <release>16</release>
        </configuration>
      </plugin>
      
    <plugin>
        <groupId>org.openjfx</groupId>
        <artifactId>javafx-maven-plugin</artifactId>
        <version>0.0.6</version>
        <configuration>
            <mainClass>KMS.Main</mainClass>
        </configuration>
    </plugin>    
    
      <plugin>
        <artifactId>maven-assembly-plugin</artifactId>
        <version>3.3.0</version>
        <executions>
          <execution>
            <phase>package</phase>
            <goals>
              <goal>single</goal>
            </goals>
          </execution>
        </executions>
        <configuration>
            <archive>
            <manifest>
                <addClasspath>true</addClasspath>
            <mainClass>KMS.Main</mainClass>
            </manifest>
            </archive>        
          <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
          </descriptorRefs>
        </configuration>
      </plugin> 
      
    </plugins>
  </build>
  
  <dependencies>
    <dependency>                                                    <!-- PostgreSQL -->
        <groupId>org.postgresql</groupId>
        <artifactId>postgresql</artifactId>
        <version>42.2.20</version>
    </dependency>
    
    <dependency>                                                    <!-- AnimateFX -->
        <groupId>io.github.typhon0</groupId>
        <artifactId>AnimateFX</artifactId>
        <version>1.2.1</version>
    </dependency>
    
    <dependency>
        <groupId>de.jensd</groupId>
        <artifactId>fontawesomefx</artifactId>
        <version>8.2</version>
    </dependency>
    
    <dependency>                                                    <!-- JavaFX - Controls -->
        <groupId>org.openjfx</groupId>
        <artifactId>javafx-controls</artifactId>
        <version>16</version>
    </dependency>
    
    <dependency>                                                    <!-- JavaFX - Graphics -->
        <groupId>org.openjfx</groupId>
        <artifactId>javafx-graphics</artifactId>
        <version>16</version>
    </dependency>
    
    <dependency>                                                    <!-- JavaFX - Base -->
        <groupId>org.openjfx</groupId>
        <artifactId>javafx-base</artifactId>
        <version>16</version>
    </dependency>
    
    <dependency>                                                    <!-- JavaFX - FXML -->
        <groupId>org.openjfx</groupId>
        <artifactId>javafx-fxml</artifactId>
        <version>16</version>
    </dependency>
    
    <dependency>                                                    <!-- JavaFX - Web -->
        <groupId>org.openjfx</groupId>
        <artifactId>javafx-web</artifactId>
        <version>16</version>
    </dependency>
    

<dependency>                                                    <!-- JavaFX - Swing -->
    <groupId>org.openjfx</groupId>
    <artifactId>javafx-swing</artifactId>
    <version>16</version>
</dependency>

<dependency>                                                    <!-- JavaFX - Media -->
    <groupId>org.openjfx</groupId>
    <artifactId>javafx-media</artifactId>
    <version>16</version>
</dependency>
                                                              

Answer 1

Can you move the javafx files to a different location? eg c:/ Sometimes such errors can be related to the file location. Redefine after copying files. You can open a different project and try. My answer may be bad but I wanted to give an idea.

Answer 2

Here is the Problem explained - and also how to fix it:

The reason is that the Java runtime will check if the main class extends javafx.application.Application, and if that is the case, it strongly requires the javafx platform to be available as a module, and not as a jar for example.

To fix it you have to create a "normal" Main and link your FX Main in that, after that you have to pick the new Main in the pom.xml setup.

Working example: src/Main.java

public class Main {

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

src/HelloFX.java

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.stage.Stage;
//import javafx.graphics;

public class HelloFX extends Application {

    @Override
    public void start(Stage stage) {
        String javaVersion = System.getProperty("java.version");
        String javafxVersion = System.getProperty("javafx.version");
        Label l = new Label("Hello, JavaFX " + javafxVersion + ", running on Java " + javaVersion + ".");
        Scene scene = new Scene(l, 640, 480);
        stage.setScene(scene);
        stage.show();
    }

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

pom.xml

<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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>HelloFX</groupId>
  <artifactId>HelloFX</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <build>
    <sourceDirectory>src</sourceDirectory>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.8.0</version>
        <configuration>
          <release>10</release>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-jar-plugin</artifactId>
        <version>3.1.0</version>
        <configuration>
          <archive>
            <manifest>
              <addClasspath>true</addClasspath>
              <mainClass>Main</mainClass>
            </manifest>
          </archive>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-assembly-plugin</artifactId>
        <version>3.1.0</version>
        <configuration>
          <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
          </descriptorRefs>
          <archive>
            <manifest>
              <addClasspath>true</addClasspath>
              <mainClass>Main</mainClass>
            </manifest>
          </archive>
        </configuration>
        <executions>
          <execution>
            <id>make-assembly</id> <!-- this is used for inheritance merges -->
            <phase>package</phase> <!-- bind to the packaging phase -->
            <goals>
              <goal>single</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
  <dependencies>
    <dependency>
        <groupId>org.openjfx</groupId>
        <artifactId>javafx-controls</artifactId>
        <version>11</version>
    </dependency>
    <dependency>
        <groupId>org.openjfx</groupId>
        <artifactId>javafx-graphics </artifactId>
        <version>11</version>
                <classifier>win</classifier>
    </dependency>
    <dependency>
        <groupId>org.openjfx</groupId>
        <artifactId>javafx-graphics </artifactId>
        <version>11</version>
                <classifier>linux</classifier>
    </dependency>
    <dependency>
        <groupId>org.openjfx</groupId>
        <artifactId>javafx-graphics </artifactId>
        <version>11</version>
                <classifier>mac</classifier>
    </dependency>
  </dependencies>
</project>

Credit: https://github.com/javafxports/openjdk-jfx/issues/236