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Thread: JavaFX in Netbeans using Maven: some issues taking over a poject

  1. #1
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    Default JavaFX in Netbeans using Maven: some issues taking over a poject

    I inherited a project that was using Ant in Netbeans and was last worked on over a year ago. Development is on a Mac, with the aim of deploying to Mac, Linux and Windows.

    The last compiled JAR file can run with a recipe like this:

    `%java -Djava.library.path=$HOME/Downloads/javafx-sdk-17.0.9/lib -jar /Users/philip/Downloads/genesis2.jar`

    If I run it with a newer JavaFX SDK, javafx-sdk-20.0.2 also works. However if I use v21, I get a spew of exceptions like

    Exception in thread "JavaFX Application Thread" java.lang.UnsatisfiedLinkError: 'long com.sun.glass.ui.mac.MacAccessible._createGlassAcc essible()'

    I tried to set up a build environment but Netbeans objected to setting it up with Ant, whether I opened the existing project or tried to start from scratch, because the existing Java platform does not support JavaFX. I tried using the OpenJDK but the interface for changing the Java platform was broken.

    So: give up on that and change to using Maven.

    That sort of worked but I could bet get a build that would run with the same recipe:

    `% java -Djava.library.path=$HOME/Downloads/javafx-sdk-21/lib target/Genesis2JavaFX-2.0-SNAPSHOT.jar
    Error: Could not find or load main class target.Genesis2JavaFX-2.0-SNAPSHOT.jar
    Caused by: java.lang.ClassNotFoundException: target.Genesis2JavaFX-2.0-SNAPSHOT.jar`

    I found out how to package all dependencies and that does run, after fixing a few things. For example, whenever there was code like

    X.getClass().getResource(Y);

    I changed it to

    X.getClass().getClassLoader().getResource(Y);

    I am not sure why this worked in the former build but not now.

    Another issue. The Ant build was able to create a JAR file that preserved the subdirectory structure whereas with Maven, I could only find a way to package all resources at the top-level:

    `<resources>
    <resource>
    <directory>src/main/java/org/h3abionet/genesis/view</directory>
    </resource>
    <resource>
    <directory>src/main/java/org/h3abionet/genesis/image</directory>
    </resource>
    <resource>
    <directory>src/main/java/org/h3abionet/genesis/help</directory>
    </resource>
    <resource>
    <directory>src/main/java/org/h3abionet/genesis/css</directory>
    </resource>
    </resources>
    `

    To make all this work, I had to change all references to directory structure to current directory, e.g. change

    view/AdmixtureOptions.fxml

    to

    view/Main.fxml

    etc. throughout the code.

    If I inspect the contents of the JAR file, the earlier build does preserve the directory structure.

    Questions:
    1. Is there a way I can configure Maven in pom.xml to preserve the directory structure when copying resources (non-code files) to JAR?
    2. Is there a way in Netbeans using Maven to create a JAR file that can run on the command line with a pointer to a library as the old Ant build did?
    3. Are there any pointers to best practice in using Maven + Netbean for JavAFX projects?

    PS: some pointers to how to format code or scripts not in Java would be helpful too

    --- Update ---

    That sort of worked but I could bet get a build that would run with the same recipe:

    Should be

    That sort of worked but I could *not* get a build that would run with the same recipe:

    Seems that this forum dislikes my browsers as some features liked editing posts are broken.

  2. #2
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    Default Re: JavaFX in Netbeans using Maven: some issues taking over a poject

    A few answers. Here is how to add a path to place resources in the JAR file (in pom.xml):

    <build>
    <resources>
    <resource>
    <directory>src/main/java/org/h3abionet/genesis/view</directory>
    <targetPath>org/h3abionet/genesis/view</targetPath>
    </resource>
    </build>

    To run the command line with a specific JavaFX library this is the basic recipe, assuming you have put the lib directory of a downloaded JavaFX library in /usr/local/lib/:

    JARF=pathtojar/jarfile.jar
    LIB=/usr/local/lib/JavaFX-21/
    MODS=javafx.controls,javafx.fxml
    java --module-path $LIB --add-modules $MODS -jar $JARF

  3. #3
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    Default Re: JavaFX in Netbeans using Maven: some issues taking over a poject

    To create a JAR file that can be run with a pointer to a library (similar to your old Ant build), you can use the maven-assembly-plugin to create an uber-jar or executable jar.

    Here's an example configuration for creating an executable JAR:
    <plugin>
    <artifactId>maven-assembly-plugin</artifactId>
    <version>3.3.0</version>
    <configuration>
    <archive>
    <manifest>
    <mainClass>your.main.class.Main</mainClass>
    </manifest>
    </archive>
    <descriptorRefs>
    <descriptorRef>jar-with-dependencies</descriptorRef>
    </descriptorRefs>
    </configuration>
    <executions>
    <execution>
    <id>make-assembly</id>
    <phase>package</phase>
    <goals>
    <goal>single</goal>
    </goals>
    </execution>
    </executions>
    </plugin>

    This is the optimised code for your query as far as I know for further assistance you may visit https://www.programminghomeworkhelp.com/netbeans/ there you will find an expert who can solve your queries.

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