Hi there, thanks for taking an interest.
The jdk plugin is mostly here for legacy reasons, we encourage people to go the path of using the ant, gradle[w] or maven plugins to get java based applications working.
A snapped jre in a confined environment with no application to it added is mostly useless (exceptions apply) as it will not be able to see what is on the filesystem by default.
Let’s see if we can approach this differently, tell us what you are trying to get done and let’s see where we can go from there.