invalid header file while using jar for archiving

Question

When i use this cmd line : jar cmf arshad.mf ars.jar *.class i get this error :

invalid header field name:Manifest-version

This is my manifest file :

Manifest-Version: 1.0
Main-Class:t

i made the manifest file with notepad in UTF-8 encoding - is there any problem with the manifest ?

Answer 1

Add a space after the colons:

Manifest-Version: 1.0
Main-Class: t