Home/ Questions/Q 6677157
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-26T04:04:56+00:00

I’ve got a weird problem that I can’t understand… I have a simple HelloWorld

  • 0

I’ve got a weird problem that I can’t understand… I have a simple HelloWorld jar that I built in Eclipse which has the Apache Loggings jar on it’s classpath. I’ve written a script to run the jar:

#!/bin/sh
export CLASSPATH=lib/*:$CLASSPATH
java -jar HelloWorld.jar

The directory structure here is a main directory with the HelloWorld.jar and a lib subdirectory holding the commons-logging-1.1.1.jar.

Running this script works fine. However, when I place the HelloWorld.jar into the lib directory (i.e. to contain all the JARs in one place), and executing java -jar lib/HelloWorld.jar, I get:

Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory

error. Why?!?!?!?!

I’m asking this because I’ve used the JarBundler on OSX to create an Application bundle for the HelloWorld app and placed a modified script in the MacOS directory whereas all the libs are placed in the Resources/Java directory. Modified version of the script is:

#!/bin/sh
RESOURCE_DIR=$(cd "../Resources"; pwd)
export CLASSPATH=$RESOURCE_DIR/Java/*:$CLASSPATH
java -jar $RESOURCE_DIR/Java/HelloWorld.jar

and I’m getting the same error as above I’d really appreciate any help understanding why I can’t do this and/or how to fix it?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Classpath doesn’t work with wildcards. Every jar has to be specified explicitly, either as part of the CLASSPATH variable or in the manifest of another jar that is included in the classpath.

    Also, IIRC java -jar ignores all the third party jars that are present in the classpath. Why not do this instead?

    java -cp yourJar:logJars <mainClass>
    • 0