sachin,
j2ee = java 2 Platform, Enterprise Edition
yes with ur skill set u can develop an application.
Go to
http://java.sun.com/products/OV_enterpriseProduct.html to get an overview of what is involved.
To start off u will need an application server + webserver.. there are many available commercial and free and most of the commercial s/w have an evaluation download which work just as good but for like 30 days or so.
HTH,
Anup