Build failed: Could not initialize class org.codehaus.groovy.runtime.InvokerHelper

Hello, so I tried to run the FXSampler as described in the readme.md by cloning it, checking out a branch (9.0.0 in my case) and running ./gradlew run. However, there is a Gradle exception saying: Could not initialize class org.codehaus.groovy.runtime.InvokerHelper After a bit of googling I found out that you could change the gradle-wrapper.properties to pull Gradle 6.3 instead of 6.0.1, which indeed fixed this problem. However, now the build fails saying: Deprecated Gradle features were used in this build, making it incompatible with Gradle 7.0. I have no idea why this is a problem since I am not even using Gradle 7.0. Any help would be appreciated. Thanks!

[marcin-chwedczuk]

I got this error on brach jfx-13 and JDK 14. To fix update Gradle wrapper to at least 6.3 as described here: https://stackoverflow.com/a/61509462/1779504

[mlt]

Might be related that gradle has an issue 12599. One has to upgrade gradle to use newer jdk. I updated wrapper with gradle wrapper to 6.8. Then I was able to build with ./gradlew build check -x javadoc. However, I still can’t run examples 😦

Error occurred during initialization of boot layer
java.lang.module.FindException: Error reading module: C:\dev\java\controlsfx\controlsfx-samples\build\classes\java\main
Caused by: java.lang.module.InvalidModuleDescriptorException: Package org.controlsfx.fxsampler.fxsampler not found in module

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':controlsfx-samples:run'.
> Process 'command 'C:\tools\jdk-14.0.1\bin\java.exe'' finished with non-zero exit value 1