Where Do I Search For Solution Architect ( Java / J2ee)?

The way you have asked the questions, it seems that you are an employer and you need people who can perform the job of working on Java/ J2ee. If this is the case that you have mentioned about, there are several avenues that you can try to get the kind of person and the prime avenue that I would like to suggests you is that contact some placement agencies that are operating in your area and they certainly can provide you a good person. The benefit that you can get by giving the task to the placement agencies is that though they charge you a hefty sum, they are expected to take the botheration of sorting out the people and they will send you only those people who are selected few and your job is quite easy.
      
The other avenue is also quite pragmatic and tell people that are working in your organization about finding the right kind of people. You can also say that a certain amount will also be given to the person who brings the candidate who is a performer and get selected.

The other choice is the obvious one and that's the internet. Depending on what capacity you require, either per project or on a part/full time basis, there are many sites that can help. Freelance project sites such as Directfreelance.com and Rentacoder.com will be a good start.