Yes, I know that Servlet runs on the server ,not in my browser. My expressions have some problem.
Yes, you are right . I read few java book cause busy work. In fact , you are very good teacher.
I need more time to read it and think it over by myself. I found I just relyed on your answer so much. So I should change the way .
But I will ask you some questions if I have some problems which I can't solve it by myself.