[gt565k]

From my personal experience, people who go the java route get stuck in more corporate jobs where things are slow and boring.

Java is just not that great for web dev. Dynamic languages offer much more flexibility. Although, at the end of the day, most web apps are REST APIs with Angular or another front-end framework.

I'd say learn Rails, as there are a lot of jobs in that area of expertise. Once you get good with Rails, learn Django, and then .NET MVC

Don't stick with one. Learn multiple frameworks so you can see the pros and cons of each.

Some will integrate better with certain technologies because of community support.