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Editorial Team
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Asked: 2026-06-03T10:34:29+00:00

I have this project on Eclipse 3.7 (Indigo) and planning to build the *.jar.

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I have this project on Eclipse 3.7 (Indigo) and planning to build the *.jar.
I am to build the project by File > Export > Java.Runnable JAR File > Named the filename of the jar file > Finish.
An error always return to me when running the jar file.

Could not find the main class: [package nmame].[Class name of Main class (PSVM) is located].
Program will exit.

In addition, MySQL Connector 5.1 was included as Referenced Library for JDBC use.

How can I resolve and be able to build a jar file that is running as runned on Eclipse as Java Application?

Thanks in advance.

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1 Answer

  1. Editorial Team

    When you export the project try selecting the option :

    Copy required libraries into a sub-folder next to the generated jar

    Screenshot

    This will create a lib folder containing the required dependency libraries ..

    You have also to select a valid launch configuration for the program, to make sure that the MANIFEST file will be created with the MAin class attribute populated correctly .

    When you run the generated jar you should run it with this command line (READ the MANIFEST.MF) : 

    java -jar yourjar.jar

    or with Main class specified in the command line : 

    java yourjar.jar MainClass
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