Certifications are a good reinforcment that you know something. They also help with promotions if your employer values that certification.
My opinion is when it is all said and done experience is the best thing to have. You will earn more money based on experience than with certifications. Usually when you get the experience if you take a certification
test you can pass with a high score with very little extra study time.
I have heard that passing the
SCJP is viewed as 1 year of experience.