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I’ve done everything I know and found on the internet to open a file. jar, but nothing works. When I do 2 clicks it just doesn’t open, it doesn’t error, but it doesn’t open anything either. I have tried running from Windows Command Prompt, the following appears. " no major manifest attribute in Gym.jar, "I already opened that folder in the manifest, I made a change but it’s still the same thing.
I also tested the file on another computer, gave in it. I generated other files . jar and also does not work. I generate these files by eclipse. It had already generated files . jar a few months ago and it worked normal, but now I don’t know what else to do.
Inside my MANIFEST.MF file has the following information: Manifest-Version: 1.0 Sealed: true.
You did
java -jar seuarquivo.jar?– Pablo Almeida
Already, this appears. "no major manifest attribute in Gym.jar"
– Edson F.
How did you beget this jar?
– Pablo Almeida
By exporting from eclipse option, then generate JAR file and finally choose the file that contains the main method.
– Edson F.
Your mistake is that there is no main class in your JAR Manifest. This can only be because Eclipse did not find a main class (a class with a main method) in your project. Make sure you’re all right with your project. Also, try to open your JAR with 7-zip or similar, open your Manifest file and put its contents in question.
– Pablo Almeida
The code is written correctly, has a main method, and in the eclipse it runs normal without problem. I opened in Winrar on MANIFEST.MF file only has, Manifest-Version: 1.0 and Sealed: true, that’s all you have.
– Edson F.