request javax.servlet.http.HttpServletRequest
response javax.servlet.http.HttpServletResponse
pageContext javax.servlet.jsp.PageContext
page java.lang.Object
config javax.servlet.ServletConfig
out javax.servlet.jsp.JSPWriter
session javax.servlet.http.HttpSession
application javax.servlet.ServletContext
exception java.lang.Throwable

implicit objects are available in methods generated by JSP engine and not in user defined methods.