Abou the java docs

[Sony Agrawal]

Hi i think this not the correct forum to ask this question.but still makes more sense here(i guess)
When using netbeans, if i have to find the javadoc of any method , i can do that by Ctrl+space ,then an overlay would describe the method.
But it not same with Servlet methods do i need to import any docs and add it to netbeans???
Please suggest... it a really helpful feature.