…it hasn’t really had that big an impact on my career. On the other hand the impact on my knowledge of the Java Language was immense.
I took the programmer exam and found it a worthwhile exercise, because it covers all aspects of the language, even those that you usually avoid / code around / get right but don’t know why / use seldomly.
I found it a very positive experience… when I had to study for the certification exam, I dug into the language details far more deeply and comprehensively than I ever would have on my own…
If your Java experience is weak, certification is likely to be a significant help in getting a Java job.