[java] Why has it failed to load main-class manifest attribute from a JAR file?

I discovered that I was also having this error in NetBeans. I hope the following is helpful.

  1. Make sure that when you go to Project Configuration you set the main class you intend for running.
  2. Do a Build or Clean Build
  3. Place the jar file where you wish and try: java -jar "YourProject.jar" again at the command line.

This was the problem I was getting because I had other "test" programs I was using in NetBeans and I had to make sure the Main Class under the Run portion of the Project configuration was set correctly.

many blessings, John P

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