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Asked: May 11, 20262026-05-11T08:45:55+00:00 2026-05-11T08:45:55+00:00

I ask because I have an unsigned jar that runs and a signed version

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I ask because I have an unsigned jar that runs and a signed version that doesn’t. Looking at the manifests, I see no main class thing for the signed one.

Do I have to run a signed jar from web start?

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  1. 2026-05-11T08:45:55+00:00Added an answer on May 11, 2026 at 8:45 am

    Not necessarily, but if you don’t have a Main-class: in the manifest, you can’t run it as an executable. If you know the main class, you can run it using the java executable, eg

    $ java -classpath ./myjar.jar MyClass 
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