Please use real words when posting to the forums. Abbreviations such as "wt" in place of "what" and all the other abbreviations you posted only serve to make your posts more difficult to read and less likely to generate useful responses.
sudhakar naga wrote:any one tel me wt are the common problems wel developing the web based java application please
One of the most common problems I've seen is developers trying to develop an application using a web technology without first learning how to use the technology. For example, you want to use Servlets and JSP, you first need to learn how to build applications using Servlets and JSP.
What type of applications do you want to build? What web technology do you want to use?
There are a lot of resources available that will help you in the areas you want.