doubt on servlet compilation

hai i'm new to this page nd beginner in servlet so i need your help guys..
i downloaded my servlet code i know why we are using META-INF/MANIFEST.MF file but my question is how to compile the code to create that folder and file...? ? ? ?
i placed my folder in tomcat.../webapps and tat folder name is DEMOSERVLET with in tat folder i'm having my all servlet files..(WEB_INF,login.html,META-INF).
Advance THANKS for helping...

Actually, you don't need that folder and file. It may get added when a war file is created, but it is not necessary.

Thank you so much

but what cmd to pass to create a war file ? ? ?

A war file is nothing but a jar file with a different file extension, and a convention as to what its contents are. You can create it from the command line via the jar utility or -and this is what I advise you to do if you don't already- using the ant build tool's war task.

(And a jar file is nothing but a zip file with a different file extension, just in case you were wondering, so you can use any zip handling tool as well.)

sorry but still am confused

if my servlets folder is not in webapps means i ll use this cmd jar -cvf DEMOSERVLET.war * to create a war file nd i ll deploy it through tomcat but now i placed the full folder in tomcat webapps so can you tell the command to create war ? ? ?

I'm not sure what you're asking. It sounds if you are successfully creating a war file, but now you're asking how to create a war file? Maybe you can rephrase the question while also giving more detail on what you did and did not do successfully.

sorrry Ulf Dittmer i actually thought for every servlet we need to create META-INF/MANIFEST.mf file so oly asked whether it ll get created through cmd nd if so wat is tat cmd.... but now i get cleared servlet works cool with out that file... Thanks for your help. . .