error in building jar file in netbeans

Question

Not copying library C:\\Users\\Administrator\\Documents\\NetBeansProjects\\gc , it's a directory. Why this error occurs while building a jar file. Anyone familiar with this?

Answer 1

Do you have a manifest?

There's normally a default manifest: http://docs.oracle.com/javase/tutorial/deployment/jar/defman.html

You have to set an entry point: http://docs.oracle.com/javase/tutorial/deployment/jar/appman.html

Basically, create a META-INF\\Manifest.MF file. Then, and add "Main-class:<your main class> eg com.example.blahclass" (if you're not using packages, then don't keep the com.example part)