ok, well let me start off by saying this is not the right place to ask this question. there are other sections for that
secondly if the proper java package is installed properly path is irrelevant windows will know its there and eclipse will too
you probably have JRE the java runtime environment, you need something different, which you could easily identify by doing a google search or asking in the right place though i suggest google searching it kuz if you cant even figure that much out on your own eclipse will be useless to you