He asked the same question 3 weeks ago and received an answer [BUG] Not detecting Java on Linux (Lubuntu 19.04)
Java 13 is not supported (yet). Java 11 is a LTS version, default on Ubuntu and can be used. If we want to keep that ticket i would requalify it as an improvement, minor and name it as “Add support for Java 13”. Although i’m not sure if we should do this, as it will be dead soon and Oracle will release 14, 15, 16 and so on with their weird release cycle. You can’t keep up with every new short time release. 11 is enough for a while.