I’ve been using java for years — between college, grad school, and several jobs I almost don’t want to think about how long, but it’s at least a decade.
The first time I setup java I had to download the JDK from Oracles website, install eclipse, make sure the two were connected correctly with environment variables, etc. etc. etc. It took several hours.
That’s an average total time. At a job where we used RAD it took far longer, when I was on a team that used straight Eclipse it took less.