Help need for Java Certification

Hi

I am thinking of getting some certification in Java.I have gone through some websites which have listed out the various Java certifications available in the market.

However, I have not got enough help required.Could someone please direct meto some useful websites .

I am a programmer with around 5yrs experience in C++ and Telecom industry.Will Java certification be useful to me? please consider today’s job scene and suggest what other certifications I could attempt

Thanks in advance for your time