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can't run jar file [message #907325]

Mon, 03 September 2012 15:13

karl neumann
Messages: 2
Registered: August 2012

Junior Member

After having developed my first java applet which runs great in eclipse, I exported the project to a jar file. When I try to run the jar file from a command prompt I get: "no main manifest attribute, in MyClass.jar". I added the following line to the MANIFEST.MF file: Main-Class:org.eclipse.jdt.MyClass . I still get the same message when trying to run the jar file. I am not sure about the org.eclipse.jdt part. It's a guess. What am I doing wrong? Another observation, the MyClass.java source file does not have a main() or init() method. I don't know if that is relevant or not. I am at wits end trying to figure this out. Please help!

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Re: can't run jar file [message #907469 is a reply to message #907325]

Tue, 04 September 2012 00:15

Russell Bateman
Messages: 2711
Registered: July 2009
Location: Provo, Utah, USA

Senior Member

On 09/03/2012 01:13 PM, karl neumann wrote:
> After having developed my first java applet which runs great in eclipse,
> I exported the project to a jar file. When I try to run the jar file
> from a command prompt I get: "no main manifest attribute, in
> MyClass.jar". I added the following line to the MANIFEST.MF file:
> Main-Class:org.eclipse.jdt.MyClass . I still get the same message when
> trying to run the jar file. I am not sure about the org.eclipse.jdt
> part. It's a guess. What am I doing wrong? Another observation, the
> MyClass.java source file does not have a main() or init() method. I
> don't know if that is relevant or not. I am at wits end trying to figure
> this out. Please help!

This might help.

http://www.javahotchocolate.com/tutorials/jars-and-wars.html#runnable

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