Make a jar in windows 2000 or One studio

Question

Hi,
I am trying to make a simple jar file using ONE studio from sun but I'm not too sure how to. When I use the Jar recipe thing in ONE, I can't execute it as it sais "cannot find main-class manifest attribute" Anyone know how to do this either in ONE studio or in Win2000?

Answer 1

<<path of you JDK installation>>jar cmvf0 <<Path to your manifest file>> <<Path and filename of your jar file>> -C <<directory where your class files are>> .
eg.
C:\j2sdk1.4.1_02\bin\jar cmvf0 D:\mainClass.txt D:\exe.jar -C D:\ClassFiles . <-- you need the dot
Als you need to create a manifest file that tells the jar file which class has the main method.
eg. mainClass.txt
Main-Class: mainClassFile
Name: Jar File Example
This file needs to end with a carriage return
Use the syntax above and you will always get a executable jar file ;)