NetBeans is no longer generating a JAR file for code that it used to

Question

Two years ago I wrote a simple upload applet using Java, developed using NetBeans. When I first hit \"Clean and Build\" back then, and for some time afterwards, it worked perfec

Answer 1

Had the same problem with Netbeans 7.1 and a project started with Netbeans 7.0.1.
When building the project, the the jar file was lacking some files, in my case the Main class. Recreating the project worked this out for me too. Thanks a lot!