Make EPUB-Checker work with non-installing Java Distributions on Windows systems

[sermo-de-arboribus]

On Windows systems, launch4j uses registry entries to determine the Java installation to be used, based on the minimum and maximum version requirements (cf. https://sourceforge.net/p/launch4j/feature-requests/127/). Therefore EPUB-Checker does not work with Java distributions, that do not add registry entries, but are only configured via system variables (JAVA_HOME and/or PATH).
Is there a way to use the JAVA_HOME system variable as a fall-back, only in case when no suitable registry entries can be found?

[tofi86]

I guess we have to wait for a launch4j update which supports JAVA_HOME search. Reading the linked issue it's planned for the next release. However, the project isn't very active atm, so don't expect this anytime soon.