One is: Please take the time to choose the correct forum for your posts. This forum is for questions on Servlets.
This post has been moved to a more appropriate forum.
Secondly, there aren't many rules that you need to worry about here on the Ranch, but one that we take very seriously regards the use of proper names. Please take a look at the JavaRanch Naming Policy and adjust your display name to match it.
In particular, your display name must be a first and a last name separated by a space character, and must not be obviously fictitious.
if you would like to Master in java i guess this is the right place you would like to start. Read each chapter and then solve the exercise problems also which will test how good you understand the chapter.