Why is Java so popular

The introductory programming course at uni teaches Java, but you don't have to take it if you know a programming language. Should I teach myself python over the summer (I already know the basics) and avoid having to learn Java? Or are the haters just people who are scared of object orientation.

You must live in some sort of Brave New World, because where I'm from finishing High School is considered as having an academic degree. Anything extra is just unnecessary.