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https://issues.apache.org/jira/browse/GROOVY-9305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16982109#comment-16982109
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Paul King commented on GROOVY-9305:
-----------------------------------
Copying my answer from SO:
{{--add-modules java.xml.bind}} is not appropriate for Java 11 since it has
deleted that module. I would use {{set DEBUG=true}} and see what is actually
happening on your machine. {{startGroovy.bat}} (called by
{{groovyConsole.bat}}) should be adding {{-Dgroovy.jaxb=jaxb}} to {{JAVA_OPTS}}
which is then used by {{groovy-starter.conf}}. You could check you haven't
created a custom version of that conf file on your classpath.
> Unable to load class JaxbExtensions
> -----------------------------------
>
> Key: GROOVY-9305
> URL: https://issues.apache.org/jira/browse/GROOVY-9305
> Project: Groovy
> Issue Type: Bug
> Components: Groovy Console
> Affects Versions: 3.0.0-beta-3
> Environment: Training
> Reporter: Rod Hamann
> Priority: Minor
>
> Honestly, I am learning Groovy and I am getting this will taking the online
> course.
> Windows 10
> Java Folder : *C:\Program Files\Java\jdk-13.0.1*
> +Env Vars:+
> * *CLASSPATH* = *C:\Program Files\Java\jdk-13.0.1\lib*
> * *JAVA_HOME* = *C:\Program Files\Java\jdk-13.0.1*
> * Path env has "*C:\Program Files\Java\jdk-13.0.1\bin*" in it
>
> +Console:+
> groovy> println "X"
>
> Exception thrown
> java.lang.NoClassDefFoundError: Unable to load class
> org.apache.groovy.jaxb.extensions.JaxbExtensions due to missing dependency
> javax/xml/bind/JAXBContext
> at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native
> Method)
> at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
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