Failed to load Main-Class manifest attribute

Question

I know this is a very common question, but I tried googling and got no helpful result. I\'m trying to make a jar out of my \"Main.class\" file (made in NetBeans, but I\'m not tr

Answer 1

Extract the mainifest file.

Add an extra line so it says :

Manifest-Version: 1.0
Created-By: 1.6.0_22 (Sun Microsystems Inc.)
Main-Class: Main

Make sure there is two newline characters at the end.

Update the jar file. You could either have edited the Manifest in the jar file with WinRAR, 7-zip, etc. or you could have deleted the original jar (after extracting and editing) then ran

jar -cmf MANIFEST.MF trovanum.jar *.class

Then it would use your newly modified manifest in the jar.