Does not start with OpenJDK

[DmitryBarashev]

This is discussed here:

Using open Java instead of Oracle version

Hi everybody, I have some trouble with continue using GanttProject because of the license changes of Oracle regarding Java. I am not allowed to use an unlicensed version of a software at my institution, also I am not allowed to use old not updated versions of a software, because of internet security (virus, spam, etc.). Consequently using Java from Oracle is no option for me anymore. Instead I installed an open Java version AdoptOpenJDK (https://adoptopenjdk.net/). Nevertheless when I start Gan…