jpackage'd Java application on Windows does not find classes in the included jar files

Question

I package my application with jpackage and the resulting directory structure and config file looks correct.

19.11.2023  15.49    <DIR>          app
19.11.2023  15.49           562 688 EazyCNC.exe
19.11.2023  15.49    <DIR>          runtime
               1 File(s)        562 688 bytes
               4 Dir(s)  417 389 883 392 bytes free

Directory of C:\Users\nyholku\eazycnc-build\bundle\EazyCNC\app
 
19.11.2023  15.49    <DIR>          .
19.11.2023  15.49    <DIR>          ..
19.11.2023  15.49               262 .jpackage.xml
19.11.2023  15.49           385 091 commons-lang3-3.2.1.jar
19.11.2023  15.49               653 EazyCNC.cfg
19.11.2023  15.49         3 421 155 EazyCNC.jar
19.11.2023  15.49             4 928 humble-video-all-0.3.0.jar
19.11.2023  15.49         1 509 440 jna-5.6.0.jar
19.11.2023  15.49         2 735 878 jna-platform-5.6.0.jar
19.11.2023  15.49        11 712 967 jogamp-fat.jar
19.11.2023  15.49            65 966 json-20200518.jar
19.11.2023  15.49           195 713 miglayout-3.7.jar
19.11.2023  15.49           199 631 purejavacomm-1.0.1.x.jar
19.11.2023  15.49           118 138 purejavahidapi-0.0.13.jar
19.11.2023  15.49           127 628 vecmath.jar
              13 File(s)     20 477 450 bytes
               2 Dir(s)  417 401 921 536 bytes free

The app/EazyCNC.cfg looks like

[Application]
app.mainjar=$APPDIR\EazyCNC.jar
app.classpath=$APPDIR\commons-lang3-3.2.1.jar
app.classpath=$APPDIR\humble-video-all-0.3.0.jar
app.classpath=$APPDIR\jna-5.6.0.jar
app.classpath=$APPDIR\jna-platform-5.6.0.jar
app.classpath=$APPDIR\jogamp-fat.jar
app.classpath=$APPDIR\json-20200518.jar
app.classpath=$APPDIR\miglayout-3.7.jar
app.classpath=$APPDIR\purejavacomm-1.0.1.x.jar
app.classpath=$APPDIR\purejavahidapi-0.0.13.jar
app.classpath=$APPDIR\vecmath.jar
 
[JavaOptions]
java-options=-Djpackage.app-version=1.0
java-options=-Xmx1024m
java-options=-XX:+UseG1GC
java-options=-XX:MaxGCPauseMillis=50
java-options=-XX:+PrintGC

But when I try to launch it I get:

C:\Users\nyholku>eazycnc-build\bundle\EazyCNC\EazyCNC.exe
[0.004s][warning][gc] -XX:+PrintGC is deprecated. Will use -Xlog:gc instead.
[0.017s][info   ][gc] Using G1
Error: Unable to initialize main class eazycnc.Main
Caused by: java.lang.NoClassDefFoundError: purejavahidapi/InputReportListener

But when I use javajvm directly I like this:

C:\Users\nyholku\eazycnc-build\bundle\EazyCNC>java -cp app/* eazycnc.Main

it works.

I build the app using ant as follows (I've included only the relevant bits):

<target name="jpackage-windows" if="is_windows" depends="init">
    <exec executable="${jpackage}" dir=".">
        <arg value="--win-console" />
        <arg value="--type" />
        <arg value="app-image" />
        <arg value="--verbose" />
        <arg value="--dest" />
        <arg value="${bundle-dir}/" />
        <arg value="--name" />
        <arg value="EazyCNC" />
        <arg value="--main-jar" />
        <arg value="EazyCNC.jar" />
        <arg value="--java-options" />
        <arg value="-Xmx1024m -XX:+UseG1GC -XX:MaxGCPauseMillis=50 -XX:+PrintGC" />
        <arg value="--resource-dir" />
        <arg value="${resource-dir}" />
        <arg value="--input" />
        <arg value="${jpackage-input-dir}" />
        <arg value="--runtime-image" />
        <arg value="${java-runtime-dir}" />
        <arg value="--temp" />
        <arg value="${build-dir}/wix-tempfiles" />
    </exec>

Some of the build variables are set like this:

    <property name="app-image-type" value="exe" />
    <property name="jdk-loc" value="C:\Program Files\Java\jdk-11" />
    <property name="jpackage" value="C:\Program Files\Java\jdk-21\bin\jpackage.exe" />
    <property name="jlink" value="C:\Program Files\Java\jdk-11\bin\jlink.exe" />
    <property name="targetos" value="windows" />
    <property name="pathsep" value=";" />
    <property name="resource-dir" value="package-resources/windows" />

and some other vars have these values (from my ant output):

     [echo] os.name           : Windows 10
     [echo] jdk-loc           : C:\Program Files\Java\jdk-11
     [echo] fxant-loc         : ${fxant-loc}
     [echo] basedir           : C:\Users\nyholku\eazycnc-project
     [echo] build-dir         : C:\Users\nyholku/eazycnc-build
     [echo] lib-dir           : ./lib
     [echo] src-dir           : ./src
     [echo] dist-dir          : ./downloads
     [echo] temp-dir          : C:\Users\nyholku/eazycnc-build/temp-dir
     [echo] classes-dir       : C:\Users\nyholku/eazycnc-build/classes
     [echo] eazycnc_version   : 2.0.39
     [echo] jpackage-input-dir: C:\Users\nyholku/eazycnc-build/jlink-input

I'm using the jpackage from jdk21 as jdk11 does not have it, but I would not think that is a problem.

I've been stuck at this for a day now, what am I missing?

Answer 1

Turns out that

jpackage --type exe 

just does not work for me. The resulting exe works but no classpaths apart from the main .jar seem to be set.

However

jpackage --type msi 

does work.