code for this in css and jsp

Question

whenever a code format (means any code written in c or c++, or any other language) is found , the background color changes itself to grey , else all the text(theoritical part) remains in the same white background, how this can be done using css and jsp.

Answer 1

Will need to define a span or div with a particular id or class assigned, then just define a background colour for that id or class in your css and it'll be done.

Answer 2

If what you're doing is something like a forum, use a method of wrapping code. It's not a major inconvenience, as you can see on SO you have spacing in front of lines, and on forums using BBcode you'll have things like [code].

In any case, trying to automatically detect code is not a very good idea, as false positives could easily be triggered.

Then take the code and wrap it in a tag like <code>, and style it. Stack Overflow isn't an education site, so learn about CSS yourself. Searching things on the internet isn't hard... unless you've never used the internet.