What is hard is not to choose the java version (1.8,19,...), but the JVM implementation. To choose between hotspot, openjdk, oracle. Even to find the download link without being forced to log in on oracle.com was difficult (in fact I couldnt find it the very last time).
Why is it hard? Since Go gives you no choice, the equivalent would be to pick literally any, and make do with its defaults. Same thing for tuning. You do not have to choose optimally, that's an extra constraint.
