HttpServletRequest Objects

Many time encountered with trying to get servlet context, url, path , port number.
This is for reference.

Window Url:
http://localhost:8080/mycomp/myservlet?something=nothing

- request.getRequestURL().toString()
http://localhost:8080/mycomp/myservlet?something=nothing

- request.getContextPath().toString();
/mycomp

---------url.split(cntxt)[0]---------http://localhost:8080

----request.getProtocol()---------HTTP/1.1

----request.getServletPath()---------/myservlet

----request.getRemoteHost()--------0:0:0:0:0:0:0:1

---------url.split(cntxt)[0]---------http://localhost:8080