Richtextfx: JavaFx RichText RunTime Error java.lang.NoClassDefFoundError: org/fxmisc/richtext/TextFlowLayout

[emersoneber]

I have a runtime error for java.lang.Exception: java.lang.NoClassDefFoundError: org/fxmisc/richtext/TextFlowLayout. I'm using java14 and JavaFx13. I use Maven to download the dependencies and use the maven-assembly-plugin to package my dependencies in a single jar. I already added in require org.fxmisc.richtext in module-info.java. At design time, the class call works. But not at runtime.

Mavem:

<dependency>
    <groupId>org.fxmisc.richtext</groupId>
    <artifactId>richtextfx</artifactId>
    <version>0.10.5</version>
</dependency>

The error occurs when instantiating the class in Runtime:

CodeArea codeArea = new CodeArea();

[Jugen]

I'm guessing that's because the RichTextFX multi-release jar isn't being repackaged properly into the single jar.

If I remember correctly the manifest of the repackaged jar must contain: Multi-Release: true and also make sure that the META-INF folder has a versions\9\org\fxmisc\richtext substructure containing files.

[emersoneber]

Multi-Release: true

Thanks, the manifest file was missing the Multi-Release: true

[Jugen]

Great :-)  Is that maybe a bug with the maven-assembly-plugin ?

[emersoneber]

I added it to my pom.xml in the maven-assembly-plugin.

                    <manifestEntries>
                        <Multi-Release>true</Multi-Release>
                    </manifestEntries>