How do I develop a servlet for different versions of the JDK?

Question

This is my first post here so I hope this is the appropriate forum...
I am developing a servlet on my local machine set up with :-
Windows XP Pro SP2
J2SE 1.50
Tomcat 5.5.4
However, one of the hosts where I need to use the servlet has :-
J2EE 1.4 SDK
Tomcat 4.1.29
I have installed JDK 1.4.2_06 but need to access the servlet api jar (servlet-api.jar) to compile against otherwise I get errors such as:
FirstServlet.java:4: package javax.servlet does not exist
import javax.servlet.*;
The servlet api jar I use when compiling with J2SE 1.50 is in "C:\Tomcat\Tomcat 5.5\common\lib\servlet-api.jar".
My question is where can I obtain a servlet api jar to compile against for use under J2EE 1.4 SDK / Tomcat 4.1.29 - i.e. do I need to install the relevant version of Tomcat or is the jar available seperately?
Any help much appreciated.

Answer 1

"My question is where can I obtain a servlet api jar to compile against for use under J2EE 1.4 SDK / Tomcat 4.1.29 - i.e. do I need to install the relevant version of Tomcat or is the jar available seperately?"
you can download it seperately from java servlets website
http://java.sun.com/products/servlet/download.html
you should download the tomcat version you are hosting your code
with to ensure full compatability
i think it is called servlet.jar not servlet-api.jar in older tomcats