True in other Java spheres as well. Someone writing servlets will have almost nothing in common, knowledge-wise, with someone writing Android apps. And then you have EJB, which is something else entirely.
It's like Java is English, and the job ads are for working on fantasy, sci-fi, and an encyclopedia. You have to know it, but it's a tiny fraction of what you need to know.
It's like Java is English, and the job ads are for working on fantasy, sci-fi, and an encyclopedia. You have to know it, but it's a tiny fraction of what you need to know.