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ClassNotFoundException with runnable jar [message #1850003]

Thu, 10 February 2022 11:53

Eclipse User

I made a runnable jar with packed libraries.

I'm going mad with java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

even if I added MySql Connector J in my Java Build Path.

This exception is thrown on a machine with openjdk 11.0.8, while it's not thrown on machines with 1.8.0_302.

When I try to export the runnable jar with libraries inside the lib subfolder, the exception becomes:
java.lang.NoClassDefFoundError: javax/activation/DataSource

Is it not possible to export a runnable JAR from a dev machine with Java 8 and running it on Java 11 ??

Re: ClassNotFoundException with runnable jar [message #1850104 is a reply to message #1850003]

Wed, 16 February 2022 01:06

Eclipse User

You said you made a runnable Jar. But didn't specify how you are running. Are you running it from Eclipse or from command line? In either case, can you share what the command looks like?

[Updated on: Wed, 16 February 2022 01:07] by Moderator

Re: ClassNotFoundException with runnable jar [message #1850108 is a reply to message #1850104]

Wed, 16 February 2022 03:05

Eclipse User

I solved the problem downgrading OpenJDK from 11 to 8 on the server were the JAR is running.

Regarding your questions:
- I'm running it from command line
- The command looks like "java -jar myapp.jar"

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