Oh no, going back isn't for sunk cost reasons, quite the opposite. I'd advise just about anyone against starting college.
But, ignoring the time already spent (which is already wasted), there's a 3 month period between you and the bump to employability that comes with a bachelor's degree. Nobody's making you take a Java job afterwards.
See, I don't think there's an actual bump to employability to any job that I'd want to have. And also forget that we're talking worst-case; Ideally I'll be self-employed for the rest of my life. But if something terrible happens, my GitHub, reputation, and connections will do more than a piece of paper ever could.
But, ignoring the time already spent (which is already wasted), there's a 3 month period between you and the bump to employability that comes with a bachelor's degree. Nobody's making you take a Java job afterwards.