Thursday, November 11, 2021

[FIXED] Building JavaFX app in IntelliJ IDEA using maven

November 11, 2021 intellij-idea, java, javafx, maven, maven-plugin

Issue

I've encountered some difficulties trying to build JavaFX app using maven. The app work just fine from IDE. I run maven package task and it creates JAR file. The problem is this file doesn't run. I've checked included manifest and there wasn't entry point. I've added it, but the file still doesn't run. That's how the manifest looks now (the last string was added manually):

Manifest-Version: 1.0
Archiver-Version: Plexus Archiver
Created-By: Apache Maven 3.6.3
Built-By: Комп
Build-Jdk: 15
Main-Class: org.example.App

The pom file

<?xml version="1.0" encoding="UTF-8"?>

<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>org.example</groupId>
  <artifactId>Refinement</artifactId>
  <version>1.0-SNAPSHOT</version>


  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
    </dependency>
    <dependency>
      <groupId>org.openjfx</groupId>
      <artifactId>javafx-controls</artifactId>
      <version>11.0.2</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.openjfx/javafx-maven-plugin -->
    <dependency>
      <groupId>org.openjfx</groupId>
      <artifactId>javafx-maven-plugin</artifactId>
      <version>0.0.4</version>
    </dependency>

  </dependencies>

  <build>
    <plugins>
      <plugin>
        <groupId>org.openjfx</groupId>
        <artifactId>javafx-maven-plugin</artifactId>
        <version>0.0.4</version>
        <configuration>
          <mainClass>org.example.App</mainClass>
        </configuration>
      </plugin>
    </plugins>
  </build>


</project>

And build log

"C:\Program Files\Java\jdk-15\bin\java.exe" -Dmaven.multiModuleProjectDirectory=C:\Users\Комп\Documents\javaProjects\Refinement "-Dmaven.home=C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.3.3\plugins\maven\lib\maven3" "-Dclassworlds.conf=C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.3.3\plugins\maven\lib\maven3\bin\m2.conf" "-Dmaven.ext.class.path=C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.3.3\plugins\maven\lib\maven-event-listener.jar" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.3.3\lib\idea_rt.jar=65494:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.3.3\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.3.3\plugins\maven\lib\maven3\boot\plexus-classworlds-2.6.0.jar;C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.3.3\plugins\maven\lib\maven3\boot\plexus-classworlds.license" org.codehaus.classworlds.Launcher -Didea.version=2020.2.2 package
[INFO] Scanning for projects...
[INFO] 
[INFO] -----------------------< org.example:Refinement >-----------------------
[INFO] Building Refinement 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ Refinement ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\Users\Комп\Documents\javaProjects\Refinement\src\main\resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ Refinement ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ Refinement ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\Users\Комп\Documents\javaProjects\Refinement\src\test\resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ Refinement ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ Refinement ---
[INFO] Surefire report directory: C:\Users\Комп\Documents\javaProjects\Refinement\target\surefire-reports

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running org.example.AppTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.052 sec

Results :

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0

[INFO] 
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ Refinement ---
[INFO] Building jar: C:\Users\Комп\Documents\javaProjects\Refinement\target\Refinement-1.0-SNAPSHOT.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  35.456 s
[INFO] Finished at: 2020-10-06T12:04:09+03:00
[INFO] ------------------------------------------------------------------------

Updated

I've tried to launch JAR file from CLI and get the error:

Error: Could not find or load main class org.example.App
Caused by: java.lang.NoClassDefFoundError: javafx/application/Application

Maybe I have to include JavaFX classes in the JAR file? I'm not sure if user's machine will have JavaFX installed, and I don't want to rely on this.

Also I've tried to rebuild the pom file as shown in Building a minimal JavaFX 11 application with Maven article. This new version also throws an error:

Exception in thread "main" java.lang.NoClassDefFoundError: javafx/application/Application
        at java.base/java.lang.ClassLoader.defineClass1(Native Method)
        at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)
        at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:151)
        at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:825)
        at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:723)
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:646)
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:604)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:168)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
        at org.example.Launcher.main(Launcher.java:5)
Caused by: java.lang.ClassNotFoundException: javafx.application.Application
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:606)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:168)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
        ... 10 more

Looks more verbose, but the essence is the same on my mind.

Checked PATH variable, it points to JavaFX lib folder.

Solution

To start a new JavaFX project, it's a good idea to visit this (brand new) website: https://start.gluon.io/. You will get a ZIP containing all the files and a README to get you started immediately.

For a basic app, deselect all "Gluon Features", "CloudLink" and "Attach".

Answered By - Frank

This Answer collected from stackoverflow and tested by JavaFixing community admins, is licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0

Thursday, November 11, 2021

[FIXED] Building JavaFX app in IntelliJ IDEA using maven

Issue

Solution

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