Question

I am trying to create a jar using the following command on a RHEL box

jar -cf first MANIFEST.TXT HelloWorld.class 

the contents of MANIFEST.TXT is
Main-Class: HelloWorld

This is failing with the following error
Failed to load Main-Class manifest attribute from
first

I understand i need to create the manifest file which has Main-Class manifest even with this I cannot execute
java -jar first without an error

Thanks
Bhavya

Answer 1

See the example from jar -help:

jar cvfm classes.jar mymanifest -C foo/ .

You must specify m so jar knows there is a manifest file and you should not omit the .jar from first. This should work:

jar cfm first.jar MANIFEST.TXT HelloWorld.class