When packaging with maven I seem to have an issue with org/lwjgl/glfw/GLFW

Question

I am compiling and packaging my programme with maven and it compiles and package with out any errors, when I run my jar from the command line UI loads well, however when I press the play button I get an error: "Thread-0" java.lang.NoClassDefFoundError: org/lwjgl/glfw/GLFW at gameGraphics.GraphicsDisplay.init(GraphicsDisplay.java:54).

I am using Eclipse as my IDE and have a maven project. The UI is coded using Swing. UI.png I have made a class called GraphicsDisplay which creates my GLFW window using LWJGL: GLFW window (GrapicksDisplay class) the Graphics display class is called when I press the play button in the UI and runs on a separate thread.

So when I run my programme in eclipse it all works fine.... good When I export my programme using Eclipse export and put my source folders with my runnable it all works fine. When I do a maven clean, compile and package the UI works fine however when I press the play button I get the above error: "Thread-0" java.lang.NoClassDefFoundError: org/lwjgl/glfw/GLFW at gameGraphics.GraphicsDisplay.init(GraphicsDisplay.java:54).

So here is my pom.xml:

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"> 4.0.0

<groupId>nhvdr</groupId>
<artifactId>javaSwingBuild_2D</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>javaSwingBuild_2D</name>
<url>http://maven.apache.org</url>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>12</maven.compiler.source>
    <maven.compiler.target>12</maven.compiler.target>
    <lwjgl.version>3.3.4</lwjgl.version>
    <joml.version>1.10.7</joml.version>
    <lwjgl3-awt.version>0.1.8</lwjgl3-awt.version>
    <steamworks4j.version>1.9.0</steamworks4j.version>
    <steamworks4j-server.version>1.9.0</steamworks4j-server.version>
    <joml-primitives.version>1.10.0</joml-primitives.version>
    <lwjgl.natives>natives-windows</lwjgl.natives>
</properties>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.lwjgl</groupId>
            <artifactId>lwjgl-bom</artifactId>
            <version>${lwjgl.version}</version>
            <scope>import</scope>
            <type>pom</type>
        </dependency>
    </dependencies>
</dependencyManagement>

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.lwjgl</groupId>
        <artifactId>lwjgl</artifactId>
    </dependency>
    <dependency>
        <groupId>org.lwjgl</groupId>
        <artifactId>lwjgl-glfw</artifactId>
    </dependency>

    <dependency>
        <groupId>org.lwjgl</groupId>
        <artifactId>lwjgl-opengl</artifactId>
    </dependency>
    <dependency>
        <groupId>org.lwjgl</groupId>
        <artifactId>lwjgl-opengles</artifactId>
    </dependency>
    <dependency>
        <groupId>org.lwjgl</groupId>
        <artifactId>lwjgl-stb</artifactId>
    </dependency>
    <dependency>
        <groupId>org.lwjgl</groupId>
        <artifactId>lwjgl</artifactId>
        <classifier>${lwjgl.natives}</classifier>
    </dependency>
    <dependency>
        <groupId>org.lwjgl</groupId>
        <artifactId>lwjgl-glfw</artifactId>
        <classifier>${lwjgl.natives}</classifier>
    </dependency>
    <dependency>
        <groupId>org.lwjgl</groupId>
        <artifactId>lwjgl-opengl</artifactId>
        <classifier>${lwjgl.natives}</classifier>
    </dependency>
    <dependency>
        <groupId>org.lwjgl</groupId>
        <artifactId>lwjgl-opengles</artifactId>
        <classifier>${lwjgl.natives}</classifier>
    </dependency>
    <dependency>
        <groupId>org.lwjgl</groupId>
        <artifactId>lwjgl-stb</artifactId>
        <classifier>${lwjgl.natives}</classifier>
    </dependency>
    <dependency>
        <groupId>org.joml</groupId>
        <artifactId>joml</artifactId>
        <version>${joml.version}</version>
    </dependency>
    <dependency>
        <groupId>org.lwjglx</groupId>
        <artifactId>lwjgl3-awt</artifactId>
        <version>${lwjgl3-awt.version}</version>
    </dependency>
    <dependency>
        <groupId>com.code-disaster.steamworks4j</groupId>
        <artifactId>steamworks4j</artifactId>
        <version>${steamworks4j.version}</version>
    </dependency>
    <dependency>
        <groupId>com.code-disaster.steamworks4j</groupId>
        <artifactId>steamworks4j-server</artifactId>
        <version>${steamworks4j-server.version}</version>
    </dependency>
    <dependency>
        <groupId>org.joml</groupId>
        <artifactId>joml-primitives</artifactId>
        <version>${joml-primitives.version}</version>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.8.0</version>
            <configuration>
                <release>11</release>
            </configuration>
        </plugin>
        <plugin>
            <!-- Build an executable JAR -->
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-jar-plugin</artifactId>
            <version>3.1.0</version>
            <configuration>
                <archive>
                    <manifest>
                        <addClasspath>true</addClasspath>
                        <classpathPrefix>lib/</classpathPrefix>
                        <mainClass>nhvdr.javaSwingBuild.Main</mainClass>
                    </manifest>
                </archive>
            </configuration>
        </plugin>
        <plugin>
            <artifactId>maven-dependency-plugin</artifactId>
            <executions>
                <execution>
                    <phase>install</phase>
                    <goals>
                        <goal>copy-dependencies</goal>
                    </goals>
                    <configuration>
                            <outputDirectory>${project.build.directory}/lib</outputDirectory>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

What could I be missing?

Answer 1

You got your pom.xml file mostly correct. It's just failing to build a fat jar. You can see that Maven is producing a skinny jar when opening it with 7zip, since no LWJGL files are included in the archive.

Replace your plugins with these two to build a fat jar:

        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.0</version>
                <configuration>
                    <release>11</release>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <configuration>
                    <archive>
                        <manifest>
                            <mainClass>nhvdr.javaSwingBuild.Main</mainClass>
                        </manifest>
                    </archive>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                </configuration>
                <executions>
                    <execution>
                        <id>assemble-all</id>
                        <phase>package</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>

When you build, two jars will be created. The one labeled [your_jar_name]-jar-with-dependencies.jar is the fat jar. This solution is based on this StackOverflow thread about building a fat jar with Maven.

Note that the fat jar produced will only be able to run on Windows machines, since you only selected the natives for windows-x64 on the LWJGL customize site. If you want your fat jar to run on every computer, on the LWJGL customize webiste, you have to:

1. Select "Maven" under the "Mode" category
2. Select all platforms you want to support under "Natives"
3. Download the new file and update your current pom.xml file accordingly.

You will not need to update anything under plugins after making this change.